Fixing a handfull of issues!

Reduced verification allocations
- Dependency hashing reuses one read buffer per artifact - Hash tests cover large, short, and empty entries
2026-10-22 16:17:44 +00:00 · 2026-10-21 18:07:10 -04:00 · 2026-10-21 09:08:00 -04:00 · 2026-10-21 09:06:24 -04:00 · 2026-10-21 09:06:24 -04:00 · 2026-10-21 08:27:49 -04:00
485 changed files with 34920 additions and 2652 deletions
@@ -1,87 +1,78 @@
-name: Iris Bug Report
+name: Bug report
-description: File a bug report for Iris
+description: Something in Iris isn't working.
-labels: [ bug ]
+labels: [bug]
 type: Bug
 assignees: [SwiftSwamp]
 body:
  - type: markdown
    attributes:
      value: |
-        Thank you for taking the time to fill this out!
+        Make sure you're on the [latest release](https://github.com/VolmitSoftware/Iris/releases/latest) and that it hasn't [already been reported](https://github.com/VolmitSoftware/Iris/issues?q=is%3Aissue).
-        If this does not work for you, feel free to use the [blank](https://github.com/VolmitSoftware/Iris/issues/new) format.
+
        The Iris plugin supports Minecraft 26.1.2 through 26.3 on Paper, Purpur, Leaf, Canvas, Folia, and Spigot. The Fabric, Forge, and NeoForge builds support 26.3. Both need Java 25.
  - type: textarea
-    id: how
+    id: issue
    attributes:
-      label: Problem
+      label: What issue are you having?
-      description: Please give a text description of how you reached the problem
+      description: Include any error message you saw.
      value: |
        1. Install Iris...
        2. Do this...
        3. Do that...
        4. Observe the error...
    validations:
      required: true
  - type: textarea
-    id: what
+    id: steps
    attributes:
-      label: Solution
+      label: Steps to reproduce
-      description: Explain where you think the problem comes from (optional)
+      placeholder: |
-      placeholder: The code to place a is missing b and c...
+        1. Start a server with Iris installed
        2. Change ... in the config
        3. Run /iris ...
        4. ... happens instead of ...
    validations:
-      required: false
+      required: true
  - type: input
    id: diagnostics
    attributes:
      label: Debug dump or latest log file
      description: Run `/iris debug dump upload=true` and paste the link. If Iris won't start, upload `logs/latest.log` to [mclo.gs](https://mclo.gs) and paste that link instead.
      placeholder: https://mclo.gs/...
    validations:
      required: true
  - type: input
    id: plugin-version
    attributes:
      label: "Iris version"
      description: Run `/iris debug version` (`/iris version` on Fabric, Forge, and NeoForge).
    validations:
      required: true
  - type: dropdown
    id: platform
    attributes:
-      label: Platform
+      label: Server software
      description: Which server platform is Iris running on? Pick the loader or server software, not the launcher.
      options:
-        - Paper
+        - "Paper"
-        - Purpur
+        - "Purpur"
-        - Leaf
+        - "Leaf"
-        - Canvas
+        - "Canvas"
-        - Folia
+        - "Folia"
-        - Spigot / CraftBukkit
+        - "Spigot"
-        - Fabric
+        - "Fabric"
-        - Forge
+        - "Forge"
-        - NeoForge
+        - "NeoForge"
        - Other (describe under Problem)
    validations:
      required: true
  - type: dropdown
    id: mcversion
    attributes:
      label: Minecraft Version
      description: What version of Minecraft is the server on? Iris 4.x supports 26.1.2 to 26.3 on Bukkit-family servers and 26.3 on Fabric, Forge and NeoForge; older versions are not supported.
      options:
        - '26.3'
        - '26.2'
        - '26.1.2'
        - Other (unsupported)
    validations:
      required: true
-  - type: input
+  - type: dropdown
-    id: loaderversion
+    id: minecraft
    attributes:
-      label: Platform / Loader Version
+      label: Minecraft version
-      description: Exact server or loader build (see console). For example "Paper 26.3-133", "Fabric Loader 0.19.5", "NeoForge 26.3.0.33-beta".
+      options:
-      placeholder: DO NOT SAY "LATEST"
+        - "26.3"
        - "26.2"
        - "26.1.2"
        - Other (unsupported)
    validations:
      required: true
-  - type: input
+  - type: textarea
-    id: irisversion
+    id: extra
    attributes:
-      label: Iris Version
+      label: Anything else?
-      description: What version of Iris are you running? (see console)
+      description: Other plugins involved, screenshots, or videos.
      placeholder: DO NOT SAY "LATEST"
    validations:
      required: true
  - type: input
    id: logs
    attributes:
      label: Log
      description: Paste a full log. Always use [mclogs](https://mclo.gs) Or [Pastebin](https://pastebin.com/). Must not be a crash report. Must be a full log. Must not be a screenshot of a log.
      placeholder: https://mslog.gs/...
    validations:
      required: true
  - type: markdown
    id: thanks
    attributes:
      value: "Thank you for filling out the form! We will be with you soon. Please do not ask support to review your report."
@@ -0,0 +1,8 @@
 blank_issues_enabled: false
 contact_links:
  - name: Help and questions
    url: https://volmitsoftware.com/discord
    about: Ask setup and configuration questions on the Volmit Discord.
  - name: "Iris documentation"
    url: https://docs.volmitsoftware.com/iris
    about: Installation, commands, permissions, and configuration.
@@ -1,46 +1,28 @@
-name: Iris Feature Request
+name: Suggestion
-description: File a feature request for Iris. If you want to report a bug this is not the place.
+description: Suggest a new feature or a change to Iris.
-labels: [ feature ]
+labels: [enhancement]
 type: Feature
 assignees: [SwiftSwamp]
 body:
  - type: markdown
    attributes:
      value: |
-        Thank you for taking the time to fill this out!
+        Check the [existing suggestions](https://github.com/VolmitSoftware/Iris/issues?q=is%3Aissue+label%3Aenhancement) first and add relevant information to the existing issue.
-        If this does not work for you, feel free to use the [blank](https://github.com/VolmitSoftware/Iris/issues/new) format.
+  - type: textarea
-  - type: dropdown
+    id: problem
    id: arc
    attributes:
-      label: Adding, Removing, or Changing
+      label: What are your suggestions for new features or changes?
      description: What are you doing
      options:
        - Adding
        - Removing
        - Changing
    validations:
      required: true
  - type: input
    id: atype
    attributes:
      label: Type of Modification
      description: What is it for?
      value: I want to ...
    validations:
      required: true
  - type: textarea
-    id: desc
+    id: proposal
    attributes:
-      label: What are you trying to modify
+      label: How should it work?
-      description: Give as detailed of a description as you can for the modification that you want done (include pictures if applicable)
+      description: Provide as much detail as possible on what you would like changed or added.
      value: The way I would implement this is ...
    validations:
      required: true
  - type: textarea
-    id: alternative
+    id: extra
    attributes:
-      label: Alternatives
+      label: Anything else?
-      description: What alternatives have you considered?
+      description: Any additional information such as screenshots, examples, etc.
      value: If this could not be implemented I would ...
  - type: markdown
    id: thanks
    attributes:
      value: "Thank you for filling out the form! We will be with you soon. Please do not ask support to review your report."
@@ -0,0 +1,55 @@
 name: Translation
 description: A message in Iris is wrong, missing, or unclear.
 labels: [bug]
 type: Bug
 assignees: [SwiftSwamp]
 body:
  - type: markdown
    attributes:
      value: |
        The language files are in [`core/src/main/resources/languages/`](https://github.com/VolmitSoftware/Iris/tree/HEAD/core/src/main/resources/languages).
        You can create a pull request to modify the files directly.
  - type: dropdown
    id: language
    attributes:
      label: Language
      options:
        - English (en_US)
        - German (de_DE)
        - Spanish (es_ES)
        - Finnish (fi_FI)
        - French (fr_FR)
        - Hebrew (he_IL)
        - Italian (it_IT)
        - Japanese (ja-JP)
        - Korean (ko_KR)
        - Lithuanian (lt_LT)
        - Dutch (nl_NL)
        - Polish (pl_PL)
        - Portuguese (pt_PT)
        - Russian (ru_RU)
        - Turkish (tr_TR)
        - Vietnamese (vi_VI)
        - Chinese, Simplified (zh_CN)
        - Chinese, Traditional (zh_TW)
        - Another language (name it below)
    validations:
      required: true
  - type: textarea
    id: current
    attributes:
      label: Current text
    validations:
      required: true
  - type: textarea
    id: suggested
    attributes:
      label: Suggested text
    validations:
      required: true
  - type: input
    id: where
    attributes:
      label: Where does it appear?
      description: The command used or message key where it is appearing.
@@ -1,160 +1,215 @@
                    GNU GENERAL PUBLIC LICENSE
                       Version 3, 29 June 2007
-Copyright (C) 2007 Free Software Foundation, Inc. <https://fsf.org/>
+ Copyright (C) 2007 Free Software Foundation, Inc. <https://fsf.org/>
-Everyone is permitted to copy and distribute verbatim copies of this license document, but changing it is not allowed.
+ Everyone is permitted to copy and distribute verbatim copies
 of this license document, but changing it is not allowed.
                            Preamble
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 keep intact all notices of the absence of any warranty; and give all
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 terms of section 4, provided that you also meet all of these conditions:
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@@ -177,17 +232,22 @@ code under the terms of section 4, provided that you also meet all of these cond
    interfaces that do not display Appropriate Legal Notices, your
    work need not make them do so.
-A compilation of a covered work with other separate and independent works, which are not by their nature extensions of
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+and which are not combined with it such as to form a larger program,
-"aggregate" if the compilation and its resulting copyright are not used to limit the access or legal rights of the
+in or on a volume of a storage or distribution medium, is called an
-compilation's users beyond what the individual works permit. Inclusion of a covered work in an aggregate does not cause
+"aggregate" if the compilation and its resulting copyright are not
-this License to apply to the other parts of the aggregate.
+used to limit the access or legal rights of the compilation's users
 beyond what the individual works permit.  Inclusion of a covered work
 in an aggregate does not cause this License to apply to the other
 parts of the aggregate.
-6. Conveying Non-Source Forms.
+  6. Conveying Non-Source Forms.
-You may convey a covered work in object code form under the terms of sections 4 and 5, provided that you also convey the
+  You may convey a covered work in object code form under the terms
-machine-readable Corresponding Source under the terms of this License, in one of these ways:
+of sections 4 and 5, provided that you also convey the
 machine-readable Corresponding Source under the terms of this License,
 in one of these ways:
    a) Convey the object code in, or embodied in, a physical product
    (including a physical distribution medium), accompanied by the
@@ -230,55 +290,77 @@ machine-readable Corresponding Source under the terms of this License, in one of
    Source of the work are being offered to the general public at no
    charge under subsection 6d.
-A separable portion of the object code, whose source code is excluded from the Corresponding Source as a System Library,
+  A separable portion of the object code, whose source code is excluded
-need not be included in conveying the object code work.
+from the Corresponding Source as a System Library, need not be
 included in conveying the object code work.
-A "User Product" is either (1) a "consumer product", which means any tangible personal property which is normally used
+  A "User Product" is either (1) a "consumer product", which means any
-for personal, family, or household purposes, or (2) anything designed or sold for incorporation into a dwelling. In
+tangible personal property which is normally used for personal, family,
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+or household purposes, or (2) anything designed or sold for incorporation
-particular product received by a particular user, "normally used" refers to a typical or common use of that class of
+into a dwelling.  In determining whether a product is a consumer product,
-product, regardless of the status of the particular user or of the way in which the particular user actually uses, or
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-the product.
+of the particular user or of the way in which the particular user
 actually uses, or expects or is expected to use, the product.  A product
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-"Installation Information" for a User Product means any methods, procedures, authorization keys, or other information
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 code is in no case prevented or interfered with solely because
 modification has been made.
-If you convey an object code work under this section in, or with, or specifically for use in, a User Product, and the
+  If you convey an object code work under this section in, or with, or
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-apply if neither you nor any third party retains the ability to install modified object code on the User Product (for
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-example, the work has been installed in ROM).
+Corresponding Source conveyed under this section must be accompanied
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 if neither you nor any third party retains the ability to install
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 been installed in ROM).
-The requirement to provide Installation Information does not include a requirement to continue to provide support
+  The requirement to provide Installation Information does not include a
-service, warranty, or updates for a work that has been modified or installed by the recipient, or for the User Product
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+the User Product in which it has been modified or installed.  Access to a
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+network may be denied when the modification itself materially and
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-Corresponding Source conveyed, and Installation Information provided, in accord with this section must be in a format
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-no special password or key for unpacking, reading or copying.
+documented (and with an implementation available to the public in
 source code form), and must require no special password or key for
 unpacking, reading or copying.
-7. Additional Terms.
+  7. Additional Terms.
-"Additional permissions" are terms that supplement the terms of this License by making exceptions from one or more of
+  "Additional permissions" are terms that supplement the terms of this
-its conditions. Additional permissions that are applicable to the entire Program shall be treated as though they were
+License by making exceptions from one or more of its conditions.
-included in this License, to the extent that they are valid under applicable law. If additional permissions apply only
+Additional permissions that are applicable to the entire Program shall
-to part of the Program, that part may be used separately under those permissions, but the entire Program remains
+be treated as though they were included in this License, to the extent
-governed by this License without regard to the additional permissions.
+that they are valid under applicable law.  If additional permissions
 apply only to part of the Program, that part may be used separately
 under those permissions, but the entire Program remains governed by
 this License without regard to the additional permissions.
-When you convey a copy of a covered work, you may at your option remove any additional permissions from that copy, or
+  When you convey a copy of a covered work, you may at your option
-from any part of it.  (Additional permissions may be written to require their own removal in certain cases when you
+remove any additional permissions from that copy, or from any part of
-modify the work.)  You may place additional permissions on material, added by you to a covered work, for which you have
+it.  (Additional permissions may be written to require their own
-or can give appropriate copyright permission.
+removal in certain cases when you modify the work.)  You may place
 additional permissions on material, added by you to a covered work,
 for which you have or can give appropriate copyright permission.
-Notwithstanding any other provision of this License, for material you add to a covered work, you may (if authorized by
+  Notwithstanding any other provision of this License, for material you
-the copyright holders of that material) supplement the terms of this License with terms:
+add to a covered work, you may (if authorized by the copyright holders of
 that material) supplement the terms of this License with terms:
    a) Disclaiming warranty or limiting liability differently from the
    terms of sections 15 and 16 of this License; or
@@ -303,182 +385,251 @@ the copyright holders of that material) supplement the terms of this License wit
    any liability that these contractual assumptions directly impose on
    those licensors and authors.
-All other non-permissive additional terms are considered "further restrictions" within the meaning of section 10. If the
+  All other non-permissive additional terms are considered "further
-Program as you received it, or any part of it, contains a notice stating that it is governed by this License along with
+restrictions" within the meaning of section 10.  If the Program as you
-a term that is a further restriction, you may remove that term. If a license document contains a further restriction but
+received it, or any part of it, contains a notice stating that it is
-permits relicensing or conveying under this License, you may add to a covered work material governed by the terms of
+governed by this License along with a term that is a further
-that license document, provided that the further restriction does not survive such relicensing or conveying.
+restriction, you may remove that term.  If a license document contains
 a further restriction but permits relicensing or conveying under this
 License, you may add to a covered work material governed by the terms
 of that license document, provided that the further restriction does
 not survive such relicensing or conveying.
-If you add terms to a covered work in accord with this section, you must place, in the relevant source files, a
+  If you add terms to a covered work in accord with this section, you
-statement of the additional terms that apply to those files, or a notice indicating where to find the applicable terms.
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-Additional terms, permissive or non-permissive, may be stated in the form of a separately written license, or stated as
+  Additional terms, permissive or non-permissive, may be stated in the
-exceptions; the above requirements apply either way.
+form of a separately written license, or stated as exceptions;
 the above requirements apply either way.
-8. Termination.
+  8. Termination.
-You may not propagate or modify a covered work except as expressly provided under this License. Any attempt otherwise to
+  You may not propagate or modify a covered work except as expressly
-propagate or modify it is void, and will automatically terminate your rights under this License (including any patent
+provided under this License.  Any attempt otherwise to propagate or
-licenses granted under the third paragraph of section 11).
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 this License (including any patent licenses granted under the third
 paragraph of section 11).
-However, if you cease all violation of this License, then your license from a particular copyright holder is
+  However, if you cease all violation of this License, then your
-reinstated (a)
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+holder fails to notify you of the violation by some reasonable means
 prior to 60 days after the cessation.
-Moreover, your license from a particular copyright holder is reinstated permanently if the copyright holder notifies you
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 your receipt of the notice.
-Termination of your rights under this section does not terminate the licenses of parties who have received copies or
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-9. Acceptance Not Required for Having Copies.
+  9. Acceptance Not Required for Having Copies.
-You are not required to accept this License in order to receive or run a copy of the Program. Ancillary propagation of a
+  You are not required to accept this License in order to receive or
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 nothing other than this License grants you permission to propagate or
 modify any covered work.  These actions infringe copyright if you do
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 covered work, you indicate your acceptance of this License to do so.
-10. Automatic Licensing of Downstream Recipients.
+  10. Automatic Licensing of Downstream Recipients.
-Each time you convey a covered work, the recipient automatically receives a license from the original licensors, to run,
+  Each time you convey a covered work, the recipient automatically
-modify and propagate that work, subject to this License. You are not responsible for enforcing compliance by third
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+propagate that work, subject to this License.  You are not responsible
 for enforcing compliance by third parties with this License.
-An "entity transaction" is a transaction transferring control of an organization, or substantially all assets of one, or
+  An "entity transaction" is a transaction transferring control of an
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 Corresponding Source of the work from the predecessor in interest, if
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-You may not impose any further restrictions on the exercise of the rights granted or affirmed under this License. For
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-example, you may not impose a license fee, royalty, or other charge for exercise of rights granted under this License,
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-11. Patents.
+  11. Patents.
-A "contributor" is a copyright holder who authorizes use under this License of the Program or a work on which the
+  A "contributor" is a copyright holder who authorizes use under this
-Program is based. The work thus licensed is called the contributor's "contributor version".
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 work thus licensed is called the contributor's "contributor version".
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 consequence of further modification of the contributor version.  For
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-Each contributor grants you a non-exclusive, worldwide, royalty-free patent license under the contributor's essential
+  Each contributor grants you a non-exclusive, worldwide, royalty-free
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+make, use, sell, offer for sale, import and otherwise run, modify and
 propagate the contents of its contributor version.
-In the following three paragraphs, a "patent license" is any express agreement or commitment, however denominated, not
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-If you convey a covered work, knowingly relying on a patent license, and the Corresponding Source of the work is not
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-or (2) arrange to deprive yourself of the benefit of the patent license for this particular work, or (3) arrange, in a
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-A patent license is "discriminatory" if it does not include within the scope of its coverage, prohibits the exercise of,
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-Nothing in this License shall be construed as excluding or limiting any implied license or other defenses to
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+any implied license or other defenses to infringement that may
 otherwise be available to you under applicable patent law.
-12. No Surrender of Others' Freedom.
+  12. No Surrender of Others' Freedom.
-If conditions are imposed on you (whether by court order, agreement or otherwise) that contradict the conditions of this
+  If conditions are imposed on you (whether by court order, agreement or
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-you may not convey it at all. For example, if you agree to terms that obligate you to collect a royalty for further
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-conveying from those to whom you convey the Program, the only way you could satisfy both those terms and this License
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-would be to refrain entirely from conveying the Program.
+not convey it at all.  For example, if you agree to terms that obligate you
 to collect a royalty for further conveying from those to whom you convey
 the Program, the only way you could satisfy both those terms and this
 License would be to refrain entirely from conveying the Program.
-13. Use with the GNU Affero General Public License.
+  13. Use with the GNU Affero General Public License.
-Notwithstanding any other provision of this License, you have permission to link or combine any covered work with a work
+  Notwithstanding any other provision of this License, you have
-licensed under version 3 of the GNU Affero General Public License into a single combined work, and to convey the
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+License will continue to apply to the part which is the covered work,
 but the special requirements of the GNU Affero General Public License,
 section 13, concerning interaction through a network will apply to the
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-14. Revised Versions of this License.
+  14. Revised Versions of this License.
-The Free Software Foundation may publish revised and/or new versions of the GNU General Public License from time to
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-time. Such new versions will be similar in spirit to the present version, but may differ in detail to address new
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 address new problems or concerns.
-Each version is given a distinguishing version number. If the Program specifies that a certain numbered version of the
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 version or of any later version published by the Free Software
 Foundation.  If the Program does not specify a version number of the
 GNU General Public License, you may choose any version ever published
 by the Free Software Foundation.
-If the Program specifies that a proxy can decide which future versions of the GNU General Public License can be used,
+  If the Program specifies that a proxy can decide which future
-that proxy's public statement of acceptance of a version permanently authorizes you to choose that version for the
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-Program.
+public statement of acceptance of a version permanently authorizes you
 to choose that version for the Program.
-Later license versions may give you additional or different permissions. However, no additional obligations are imposed
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-on any author or copyright holder as a result of your choosing to follow a later version.
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 author or copyright holder as a result of your choosing to follow a
 later version.
-15. Disclaimer of Warranty.
+  15. Disclaimer of Warranty.
-THERE IS NO WARRANTY FOR THE PROGRAM, TO THE EXTENT PERMITTED BY APPLICABLE LAW. EXCEPT WHEN OTHERWISE STATED IN WRITING
+  THERE IS NO WARRANTY FOR THE PROGRAM, TO THE EXTENT PERMITTED BY
-THE COPYRIGHT HOLDERS AND/OR OTHER PARTIES PROVIDE THE PROGRAM "AS IS" WITHOUT WARRANTY OF ANY KIND, EITHER EXPRESSED OR
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-THE ENTIRE RISK AS TO THE QUALITY AND PERFORMANCE OF THE PROGRAM IS WITH YOU. SHOULD THE PROGRAM PROVE DEFECTIVE, YOU
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-ASSUME THE COST OF ALL NECESSARY SERVICING, REPAIR OR CORRECTION.
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 PURPOSE.  THE ENTIRE RISK AS TO THE QUALITY AND PERFORMANCE OF THE PROGRAM
 IS WITH YOU.  SHOULD THE PROGRAM PROVE DEFECTIVE, YOU ASSUME THE COST OF
 ALL NECESSARY SERVICING, REPAIR OR CORRECTION.
-16. Limitation of Liability.
+  16. Limitation of Liability.
-IN NO EVENT UNLESS REQUIRED BY APPLICABLE LAW OR AGREED TO IN WRITING WILL ANY COPYRIGHT HOLDER, OR ANY OTHER PARTY WHO
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 PARTIES OR A FAILURE OF THE PROGRAM TO OPERATE WITH ANY OTHER PROGRAMS),
 EVEN IF SUCH HOLDER OR OTHER PARTY HAS BEEN ADVISED OF THE POSSIBILITY OF
 SUCH DAMAGES.
-17. Interpretation of Sections 15 and 16.
+  17. Interpretation of Sections 15 and 16.
-If the disclaimer of warranty and limitation of liability provided above cannot be given local legal effect according to
+  If the disclaimer of warranty and limitation of liability provided
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+an absolute waiver of all civil liability in connection with the
 Program, unless a warranty or assumption of liability accompanies a
 copy of the Program in return for a fee.
                     END OF TERMS AND CONDITIONS
            How to Apply These Terms to Your New Programs
-If you develop a new program, and you want it to be of the greatest possible use to the public, the best way to achieve
+  If you develop a new program, and you want it to be of the greatest
-this is to make it free software which everyone can redistribute and change under these terms.
+possible use to the public, the best way to achieve this is to make it
 free software which everyone can redistribute and change under these terms.
-To do so, attach the following notices to the program. It is safest to attach them to the start of each source file to
+  To do so, attach the following notices to the program.  It is safest
-most effectively state the exclusion of warranty; and each file should have at least the "copyright" line and a pointer
+to attach them to the start of each source file to most effectively
-to where the full notice is found.
+state the exclusion of warranty; and each file should have at least
 the "copyright" line and a pointer to where the full notice is found.
    <one line to give the program's name and a brief idea of what it does.>
    Copyright (C) <year>  <name of author>
@@ -498,21 +649,26 @@ to where the full notice is found.
 Also add information on how to contact you by electronic and paper mail.
-If the program does terminal interaction, make it output a short notice like this when it starts in an interactive mode:
+  If the program does terminal interaction, make it output a short
 notice like this when it starts in an interactive mode:
    <program>  Copyright (C) <year>  <name of author>
    This program comes with ABSOLUTELY NO WARRANTY; for details type `show w'.
    This is free software, and you are welcome to redistribute it
    under certain conditions; type `show c' for details.
-The hypothetical commands `show w' and `show c' should show the appropriate parts of the General Public License. Of
+The hypothetical commands `show w' and `show c' should show the appropriate
-course, your program's commands might be different; for a GUI interface, you would use an "about box".
+parts of the General Public License.  Of course, your program's commands
 might be different; for a GUI interface, you would use an "about box".
-You should also get your employer (if you work as a programmer) or school, if any, to sign a "copyright disclaimer" for
+  You should also get your employer (if you work as a programmer) or school,
-the program, if necessary. For more information on this, and how to apply and follow the GNU GPL, see
+if any, to sign a "copyright disclaimer" for the program, if necessary.
 For more information on this, and how to apply and follow the GNU GPL, see
 <https://www.gnu.org/licenses/>.
-The GNU General Public License does not permit incorporating your program into proprietary programs. If your program is
+  The GNU General Public License does not permit incorporating your program
-a subroutine library, you may consider it more useful to permit linking proprietary applications with the library. If
+into proprietary programs.  If your program is a subroutine library, you
-this is what you want to do, use the GNU Lesser General Public License instead of this License. But first, please read
+may consider it more useful to permit linking proprietary applications with
 the library.  If this is what you want to do, use the GNU Lesser General
 Public License instead of this License.  But first, please read
 <https://www.gnu.org/licenses/why-not-lgpl.html>.
@@ -25,7 +25,7 @@ Canonical English is defined in the typed Java catalogs under `core/src/main/jav
 | Spigot / CraftBukkit | plugin jar | 26.1.2 - 26.3 | Managed `iris:*` creation and generation; exact vanilla-slot `/iris replace` is unavailable |
 | Fabric | mod jar | 26.3 | Server worldgen + client HUD; requires Fabric Loader 0.19.5+ |
 | Forge | mod jar | 26.3 | Server worldgen + client HUD; current target is Forge 26.3-66.0.8 |
-| NeoForge | mod jar | 26.3 | Server worldgen + client HUD; current target is NeoForge 26.3.0.33-beta |
+| NeoForge | mod jar | 26.3 | Server worldgen + client HUD; requires NeoForge 26.3.0.65-beta+; current target is NeoForge 26.3.0.83 |
 Java 25 is required on every platform.
@@ -248,28 +248,26 @@ which is what a board reader means.
 Requirements: JDK 25 (set `JAVA_HOME` to it). The Gradle wrapper handles everything else.
-```
+```sh
-./gradlew buildAllToOut
+./gradlew buildAll
 ```
-builds every platform artifact into the workspace-level `../PluginOuts/` directory:
+This builds and verifies the Bukkit plugin, API, SPI and the Fabric, Forge and NeoForge jars
 for every Minecraft version declared in `gradle/mod-targets.json`. Artifacts stay in the
 producing module's `build/` directory. The packed Bukkit plugin is in `build/libs/`, the
 API is in `build/api/`, the SPI is in `spi/build/libs/`, and mod jars are in
 `adapters/<loader>/build/<minecraft>/libs/`.
-```
+Use `./gradlew buildBukkit` for the plugin, or `verify<Loader><mc>` for one mod jar,
-Iris v<version> [CraftBukkit] <mc>.jar
+for example `verifyFabric26_2` or `verifyNeoForge1_21_1`. `buildFabric`, `buildForge`
-Iris v<version> [Fabric] <mc>+<loader>.jar
+and `buildNeoforge` select the `minecraftVersion` Gradle property. `./gradlew checkAll`
-Iris v<version> [Forge] <mc>+<loader>.jar
+runs every check plus the complete mod matrix. Forge 1.21.1 compiles its tests because
-Iris v<version> [NeoForge] <mc>+<loader>.jar
+Forge 52 cannot bootstrap Minecraft outside FML.
 ```
-Per-platform tasks: `./gradlew buildBukkit`, `buildFabric`, `buildForge`, `buildNeoforge`. The
+Multiplexor reads `gradle/multiplexor.gradle` to discover targets and build each in a
-SPI jar (the pure-JVM adapter/platform contract, not the stable plugin API) is built to `spi/build/libs/` by
+separate source sandbox. Use its project build and deployment commands to export jars
-`./gradlew :spi:jar`.
+or install them into managed test instances. Gradle builds do not copy artifacts to
-
+external destinations.
 `./gradlew buildAll` also runs `buildAllToOut` and copies the jars into a consumer dropin tree
 for a local test server. The consumer directory defaults to `../../[Minecraft Server]/consumers/`
 when it exists, otherwise `build/consumers/` inside the repo. `-Plocation=/path/to/consumers`
 changes only the consumer directory. Both tasks copy all four verified platform jars into
 `../PluginOuts/`.
 VolmLib is built from source when a `VolmLib` checkout sits beside the repo or in a parent directory
 (`VOLMLIB_DIR` or `-PlocalVolmLibDirectory=<path>` pick another one). Without one, or with
@@ -245,9 +245,15 @@ public class NativeStructurePostProcessorSurfaceTerrainTest {
            for (int y = groundY + 1; y <= groundY + 32; y++) {
                assertTrue("Roof at " + x + "," + y, state(blocks, x, y, 0).isAir());
            }
-            for (int y = 12; y < groundY; y++) {
+            int supportY = x < 2 ? groundY - 33 : 12;
            for (int y = supportY; y < groundY; y++) {
                assertTrue("Missing foundation at " + x + "," + y, state(blocks, x, y, 0).isSolid());
            }
            if (x < 2) {
                for (int y = 13; y < supportY; y++) {
                    assertTrue("Cave beneath support at " + x + "," + y, state(blocks, x, y, 0).isAir());
                }
            }
        }
    }
@@ -268,6 +274,57 @@ public class NativeStructurePostProcessorSurfaceTerrainTest {
        assertTrue(state(blocks, 0, groundY + 1, 0).isAir());
    }
    @Test
    public void flattenPreservesCavesBelowIntactGroundAtTheSkirtEdge() {
        StructureStart start = desertStart();
        int groundY = start.getBoundingBox().minY() - 1;
        int x = start.getBoundingBox().maxX() + 23;
        int z = start.getBoundingBox().minZ();
        BoundingBox area = new BoundingBox(x, 0, z, x, 127, z);
        Map<BlockPos, BlockState> blocks = new HashMap<>();
        for (int y = groundY - 35; y <= groundY; y++) {
            BlockState block = y >= groundY - 34 && y <= groundY - 13
                    ? Blocks.CAVE_AIR.defaultBlockState() : Blocks.STONE.defaultBlockState();
            put(blocks, x, y, z, block);
        }
        put(blocks, x, groundY - 1, z, Blocks.DIRT.defaultBlockState());
        put(blocks, x, groundY, z, Blocks.GRASS_BLOCK.defaultBlockState());
        NativeStructureTerrainIntegrator.TerrainTarget target = surfaceTarget(start, StructureTerrainMode.FLATTEN);
        ((IrisStructureTerrain) target.terrain()).setHorizontalPadding(24).setFlattenRange(64);
        NativeStructureSurfaceFitter.prepareSurfaceStructures(world(blocks), area, List.of(target), (px, pz) -> groundY);
        for (int y = groundY - 34; y <= groundY - 13; y++) {
            assertEquals("Cave at " + y, Blocks.CAVE_AIR.defaultBlockState(), state(blocks, x, y, z));
        }
        assertEquals(Blocks.DIRT.defaultBlockState(), state(blocks, x, groundY - 1, z));
    }
    @Test
    public void flattenBridgesTheFoundationGapWithoutFillingACaveBelowItsSupport() {
        StructureStart start = desertStart();
        int groundY = start.getBoundingBox().minY() - 1;
        BoundingBox area = new BoundingBox(0, 0, 0, 0, 127, 0);
        Map<BlockPos, BlockState> blocks = new HashMap<>();
        put(blocks, 0, groundY, 0, Blocks.GRASS_BLOCK.defaultBlockState());
        for (int y = groundY - 11; y <= groundY - 9; y++) {
            put(blocks, 0, y, 0, Blocks.STONE.defaultBlockState());
        }
        for (int y = groundY - 20; y <= groundY - 12; y++) {
            put(blocks, 0, y, 0, Blocks.CAVE_AIR.defaultBlockState());
        }
        NativeStructureSurfaceFitter.prepareSurfaceStructures(world(blocks), area,
                List.of(surfaceTarget(start, StructureTerrainMode.FLATTEN)), (x, z) -> groundY);
        for (int y = groundY - 8; y < groundY; y++) {
            assertEquals("Foundation at " + y, Blocks.STONE.defaultBlockState(), state(blocks, 0, y, 0));
        }
        for (int y = groundY - 20; y <= groundY - 12; y++) {
            assertEquals("Cave at " + y, Blocks.CAVE_AIR.defaultBlockState(), state(blocks, 0, y, 0));
        }
    }
    @Test
    public void flattenLeavesBuriedAndSubmergedInstancesUntouched() {
        StructureStart start = desertStart();
@@ -619,10 +676,18 @@ public class NativeStructurePostProcessorSurfaceTerrainTest {
            for (int z = 0; z <= 8; z++) {
                int groundY = plan.flattenedHeights().get(NativeStructureTemplateOccupancy.columnKey(x, z)) - 1;
                assertTrue("Village grade at " + x + "," + z + ": " + groundY, groundY >= 64 && groundY <= 70);
-                for (int y = 20; y <= groundY; y++) {
+                boolean originalFoundation = (x == 0 || x == 8) && (z == 0 || z == 8);
                int supportY = originalFoundation ? 63 : 20;
                for (int y = supportY; y <= groundY; y++) {
                    assertTrue("Disconnected village ground at " + x + "," + y + "," + z,
                            state(blocks, x, y, z).isSolid());
                }
                if (originalFoundation) {
                    for (int y = 21; y < supportY; y++) {
                        assertTrue("Cave beneath foundation at " + x + "," + y + "," + z,
                                state(blocks, x, y, z).isAir());
                    }
                }
                for (int y = groundY + 1; y <= 96; y++) {
                    assertTrue("Roof remains above village at " + x + "," + y + "," + z,
                            state(blocks, x, y, z).isAir());
@@ -3,6 +3,7 @@ package art.arcane.iris.platform.bukkit.nms.v26_2_R1;
 import art.arcane.volmlib.nativelib.v26_2_R1.terrain.NativeStructureWorldgenAccess;
 import art.arcane.iris.structure.placement.IrisStructureTerrain;
 import art.arcane.volmlib.nativelib.terrain.NativeBlockChangeSet;
 import art.arcane.volmlib.util.structure.StructureTerrainMode;
 import art.arcane.volmlib.nativelib.minecraft26_2.terrain.NativeStructurePostProcessor;
 import art.arcane.volmlib.nativelib.minecraft26_2.terrain.NativeStructureTerrainIntegrator;
@@ -230,8 +231,9 @@ public class NativeStructureWorldgenAccessTest {
                recording.world(), generationCenter,
                (x, z) -> SURFACE_FIRST_FREE_Y,
                (x, z) -> FLOOR_FIRST_FREE_Y,
-                true,
+                true, true,
-                position -> false);
+                position -> false,
                NativeBlockChangeSet.disabled());
        int x = generationCenter.getMiddleBlockX();
        int z = generationCenter.getMiddleBlockZ();
@@ -248,8 +250,9 @@ public class NativeStructureWorldgenAccessTest {
                recording.world(), generationCenter(),
                (x, z) -> SURFACE_FIRST_FREE_Y,
                (x, z) -> FLOOR_FIRST_FREE_Y,
-                false,
+                false, true,
-                position::equals);
+                position::equals,
                NativeBlockChangeSet.disabled());
        assertSame(Blocks.DIRT, access.getBlockState(position).getBlock());
        assertFalse(access.ensureCanWrite(position));
@@ -319,8 +322,9 @@ public class NativeStructureWorldgenAccessTest {
                recording.world(), generationCenter(),
                (x, z) -> SURFACE_FIRST_FREE_Y,
                (x, z) -> FLOOR_FIRST_FREE_Y,
-                false,
+                false, true,
-                position -> false);
+                position -> false,
                NativeBlockChangeSet.disabled());
    }
    private static ChunkPos generationCenter() {
@@ -9,6 +9,7 @@ import art.arcane.iris.structure.nativegen.NativeStructureVolumeIndex;
 import art.arcane.iris.generation.runtime.IrisEngine;
 import art.arcane.iris.generation.runtime.Engine;
 import art.arcane.volmlib.nativelib.terrain.structure.NativeStructureVolume;
 import art.arcane.volmlib.nativelib.terrain.structure.StructureTerrainSettings;
 import art.arcane.iris.world.history.GenerationHistoryRuntimeRouter;
 import art.arcane.volmlib.util.collection.KList;
 import net.minecraft.SharedConstants;
@@ -69,7 +70,8 @@ public class NativeStructureVolumeIndexTest {
        StructureStart start = swampHut(0, 0, 4, 6);
        BoundingBox bounds = start.getPieces().getFirst().getBoundingBox();
-        KList<NativeStructureVolume> volumes = NativeStructureVolumeSource.appendPieces(null, STRUCTURE_KEY, start);
+        KList<NativeStructureVolume> volumes = NativeStructureVolumeSource.appendPieces(null, STRUCTURE_KEY, start,
                StructureTerrainSettings.SOURCE, (x, z) -> 63);
        assertEquals(1, volumes.size());
        NativeStructureVolume volume = volumes.getFirst();
@@ -84,8 +86,10 @@ public class NativeStructureVolumeIndexTest {
    @Test
    public void invalidStartsContributeNoVolumes() {
-        assertNull(NativeStructureVolumeSource.appendPieces(null, STRUCTURE_KEY, StructureStart.INVALID_START));
+        assertNull(NativeStructureVolumeSource.appendPieces(null, STRUCTURE_KEY, StructureStart.INVALID_START,
-        assertNull(NativeStructureVolumeSource.appendPieces(null, STRUCTURE_KEY, null));
+                StructureTerrainSettings.SOURCE, (x, z) -> 63));
        assertNull(NativeStructureVolumeSource.appendPieces(null, STRUCTURE_KEY, null,
                StructureTerrainSettings.SOURCE, (x, z) -> 63));
    }
    @Test
@@ -323,7 +327,7 @@ public class NativeStructureVolumeIndexTest {
        BlockingResolver coordination = new BlockingResolver();
        NativeStructureVolumeIndex.OriginResolver volumes = (engine, chunkX, chunkZ) ->
                new KList<>(new NativeStructureVolume(chunkX + ":" + chunkZ,
-                        -256, 0, -256, 256, 255, 256));
+                        -256, 0, -256, 256, 255, 256, null));
        NativeStructureVolumeIndex index = NativeStructureVolumeIndex.forTesting((engine, chunkX, chunkZ) -> {
            coordination.volumesAt(engine, chunkX, chunkZ);
            return volumes.volumesAt(engine, chunkX, chunkZ);
@@ -369,7 +373,7 @@ public class NativeStructureVolumeIndexTest {
                terrain.join();
            }
            return new KList<>(new NativeStructureVolume(chunkX + ":" + chunkZ,
-                    -256, 0, -256, 256, 100, 256));
+                    -256, 0, -256, 256, 100, 256, null));
        });
        ExecutorService owner = Executors.newSingleThreadExecutor();
        ForkJoinPool workers = new ForkJoinPool(2);
@@ -544,7 +548,8 @@ public class NativeStructureVolumeIndexTest {
            if (chunkX != originChunkX || chunkZ != originChunkZ) {
                return NativeStructureVolume.NONE;
            }
-            return NativeStructureVolumeSource.appendPieces(null, STRUCTURE_KEY, swampHut(chunkX, chunkZ, 4, 6));
+            return NativeStructureVolumeSource.appendPieces(null, STRUCTURE_KEY, swampHut(chunkX, chunkZ, 4, 6),
                    StructureTerrainSettings.SOURCE, (x, z) -> 63);
        }
    }
@@ -596,7 +601,7 @@ public class NativeStructureVolumeIndexTest {
            return new KList<>(new NativeStructureVolume(
                    chunkX + ":" + chunkZ,
                    0, 0, 0,
-                    15, 255, 15));
+                    15, 255, 15, null));
        }
    }
    private record ScopedEngine(IrisEngine engine, AtomicInteger scopes) {
@@ -245,9 +245,15 @@ public class NativeStructurePostProcessorSurfaceTerrainTest {
            for (int y = groundY + 1; y <= groundY + 32; y++) {
                assertTrue("Roof at " + x + "," + y, state(blocks, x, y, 0).isAir());
            }
-            for (int y = 12; y < groundY; y++) {
+            int supportY = x < 2 ? groundY - 33 : 12;
            for (int y = supportY; y < groundY; y++) {
                assertTrue("Missing foundation at " + x + "," + y, state(blocks, x, y, 0).isSolid());
            }
            if (x < 2) {
                for (int y = 13; y < supportY; y++) {
                    assertTrue("Cave beneath support at " + x + "," + y, state(blocks, x, y, 0).isAir());
                }
            }
        }
    }
@@ -268,6 +274,57 @@ public class NativeStructurePostProcessorSurfaceTerrainTest {
        assertTrue(state(blocks, 0, groundY + 1, 0).isAir());
    }
    @Test
    public void flattenPreservesCavesBelowIntactGroundAtTheSkirtEdge() {
        StructureStart start = desertStart();
        int groundY = start.getBoundingBox().minY() - 1;
        int x = start.getBoundingBox().maxX() + 23;
        int z = start.getBoundingBox().minZ();
        BoundingBox area = new BoundingBox(x, 0, z, x, 127, z);
        Map<BlockPos, BlockState> blocks = new HashMap<>();
        for (int y = groundY - 35; y <= groundY; y++) {
            BlockState block = y >= groundY - 34 && y <= groundY - 13
                    ? Blocks.CAVE_AIR.defaultBlockState() : Blocks.STONE.defaultBlockState();
            put(blocks, x, y, z, block);
        }
        put(blocks, x, groundY - 1, z, Blocks.DIRT.defaultBlockState());
        put(blocks, x, groundY, z, Blocks.GRASS_BLOCK.defaultBlockState());
        NativeStructureTerrainIntegrator.TerrainTarget target = surfaceTarget(start, StructureTerrainMode.FLATTEN);
        ((IrisStructureTerrain) target.terrain()).setHorizontalPadding(24).setFlattenRange(64);
        NativeStructureSurfaceFitter.prepareSurfaceStructures(world(blocks), area, List.of(target), (px, pz) -> groundY);
        for (int y = groundY - 34; y <= groundY - 13; y++) {
            assertEquals("Cave at " + y, Blocks.CAVE_AIR.defaultBlockState(), state(blocks, x, y, z));
        }
        assertEquals(Blocks.DIRT.defaultBlockState(), state(blocks, x, groundY - 1, z));
    }
    @Test
    public void flattenBridgesTheFoundationGapWithoutFillingACaveBelowItsSupport() {
        StructureStart start = desertStart();
        int groundY = start.getBoundingBox().minY() - 1;
        BoundingBox area = new BoundingBox(0, 0, 0, 0, 127, 0);
        Map<BlockPos, BlockState> blocks = new HashMap<>();
        put(blocks, 0, groundY, 0, Blocks.GRASS_BLOCK.defaultBlockState());
        for (int y = groundY - 11; y <= groundY - 9; y++) {
            put(blocks, 0, y, 0, Blocks.STONE.defaultBlockState());
        }
        for (int y = groundY - 20; y <= groundY - 12; y++) {
            put(blocks, 0, y, 0, Blocks.CAVE_AIR.defaultBlockState());
        }
        NativeStructureSurfaceFitter.prepareSurfaceStructures(world(blocks), area,
                List.of(surfaceTarget(start, StructureTerrainMode.FLATTEN)), (x, z) -> groundY);
        for (int y = groundY - 8; y < groundY; y++) {
            assertEquals("Foundation at " + y, Blocks.STONE.defaultBlockState(), state(blocks, 0, y, 0));
        }
        for (int y = groundY - 20; y <= groundY - 12; y++) {
            assertEquals("Cave at " + y, Blocks.CAVE_AIR.defaultBlockState(), state(blocks, 0, y, 0));
        }
    }
    @Test
    public void flattenLeavesBuriedAndSubmergedInstancesUntouched() {
        StructureStart start = desertStart();
@@ -619,10 +676,18 @@ public class NativeStructurePostProcessorSurfaceTerrainTest {
            for (int z = 0; z <= 8; z++) {
                int groundY = plan.flattenedHeights().get(NativeStructureTemplateOccupancy.columnKey(x, z)) - 1;
                assertTrue("Village grade at " + x + "," + z + ": " + groundY, groundY >= 64 && groundY <= 70);
-                for (int y = 20; y <= groundY; y++) {
+                boolean originalFoundation = (x == 0 || x == 8) && (z == 0 || z == 8);
                int supportY = originalFoundation ? 63 : 20;
                for (int y = supportY; y <= groundY; y++) {
                    assertTrue("Disconnected village ground at " + x + "," + y + "," + z,
                            state(blocks, x, y, z).isSolid());
                }
                if (originalFoundation) {
                    for (int y = 21; y < supportY; y++) {
                        assertTrue("Cave beneath foundation at " + x + "," + y + "," + z,
                                state(blocks, x, y, z).isAir());
                    }
                }
                for (int y = groundY + 1; y <= 96; y++) {
                    assertTrue("Roof remains above village at " + x + "," + y + "," + z,
                            state(blocks, x, y, z).isAir());
@@ -3,6 +3,7 @@ package art.arcane.iris.platform.bukkit.nms.v26_3_R1;
 import art.arcane.volmlib.nativelib.v26_3_R1.terrain.NativeStructureWorldgenAccess;
 import art.arcane.iris.structure.placement.IrisStructureTerrain;
 import art.arcane.volmlib.nativelib.terrain.NativeBlockChangeSet;
 import art.arcane.volmlib.util.structure.StructureTerrainMode;
 import art.arcane.volmlib.nativelib.v26_3_R1.terrain.NativeStructurePostProcessor;
 import art.arcane.volmlib.nativelib.v26_3_R1.terrain.NativeStructureTerrainIntegrator;
@@ -230,8 +231,9 @@ public class NativeStructureWorldgenAccessTest {
                recording.world(), generationCenter,
                (x, z) -> SURFACE_FIRST_FREE_Y,
                (x, z) -> FLOOR_FIRST_FREE_Y,
-                true,
+                true, true,
-                position -> false);
+                position -> false,
                NativeBlockChangeSet.disabled());
        int x = generationCenter.getMiddleBlockX();
        int z = generationCenter.getMiddleBlockZ();
@@ -248,8 +250,9 @@ public class NativeStructureWorldgenAccessTest {
                recording.world(), generationCenter(),
                (x, z) -> SURFACE_FIRST_FREE_Y,
                (x, z) -> FLOOR_FIRST_FREE_Y,
-                false,
+                false, true,
-                position::equals);
+                position::equals,
                NativeBlockChangeSet.disabled());
        assertSame(Blocks.DIRT, access.getBlockState(position).getBlock());
        assertFalse(access.ensureCanWrite(position));
@@ -319,8 +322,9 @@ public class NativeStructureWorldgenAccessTest {
                recording.world(), generationCenter(),
                (x, z) -> SURFACE_FIRST_FREE_Y,
                (x, z) -> FLOOR_FIRST_FREE_Y,
-                false,
+                false, true,
-                position -> false);
+                position -> false,
                NativeBlockChangeSet.disabled());
    }
    private static ChunkPos generationCenter() {
@@ -9,6 +9,7 @@ import art.arcane.iris.structure.nativegen.NativeStructureVolumeIndex;
 import art.arcane.iris.generation.runtime.IrisEngine;
 import art.arcane.iris.generation.runtime.Engine;
 import art.arcane.volmlib.nativelib.terrain.structure.NativeStructureVolume;
 import art.arcane.volmlib.nativelib.terrain.structure.StructureTerrainSettings;
 import art.arcane.iris.world.history.GenerationHistoryRuntimeRouter;
 import art.arcane.volmlib.util.collection.KList;
 import net.minecraft.SharedConstants;
@@ -69,7 +70,8 @@ public class NativeStructureVolumeIndexTest {
        StructureStart start = swampHut(0, 0, 4, 6);
        BoundingBox bounds = start.getPieces().getFirst().getBoundingBox();
-        KList<NativeStructureVolume> volumes = NativeStructureVolumeSource.appendPieces(null, STRUCTURE_KEY, start);
+        KList<NativeStructureVolume> volumes = NativeStructureVolumeSource.appendPieces(null, STRUCTURE_KEY, start,
                StructureTerrainSettings.SOURCE, (x, z) -> 63);
        assertEquals(1, volumes.size());
        NativeStructureVolume volume = volumes.getFirst();
@@ -84,8 +86,10 @@ public class NativeStructureVolumeIndexTest {
    @Test
    public void invalidStartsContributeNoVolumes() {
-        assertNull(NativeStructureVolumeSource.appendPieces(null, STRUCTURE_KEY, StructureStart.INVALID_START));
+        assertNull(NativeStructureVolumeSource.appendPieces(null, STRUCTURE_KEY, StructureStart.INVALID_START,
-        assertNull(NativeStructureVolumeSource.appendPieces(null, STRUCTURE_KEY, null));
+                StructureTerrainSettings.SOURCE, (x, z) -> 63));
        assertNull(NativeStructureVolumeSource.appendPieces(null, STRUCTURE_KEY, null,
                StructureTerrainSettings.SOURCE, (x, z) -> 63));
    }
    @Test
@@ -323,7 +327,7 @@ public class NativeStructureVolumeIndexTest {
        BlockingResolver coordination = new BlockingResolver();
        NativeStructureVolumeIndex.OriginResolver volumes = (engine, chunkX, chunkZ) ->
                new KList<>(new NativeStructureVolume(chunkX + ":" + chunkZ,
-                        -256, 0, -256, 256, 255, 256));
+                        -256, 0, -256, 256, 255, 256, null));
        NativeStructureVolumeIndex index = NativeStructureVolumeIndex.forTesting((engine, chunkX, chunkZ) -> {
            coordination.volumesAt(engine, chunkX, chunkZ);
            return volumes.volumesAt(engine, chunkX, chunkZ);
@@ -369,7 +373,7 @@ public class NativeStructureVolumeIndexTest {
                terrain.join();
            }
            return new KList<>(new NativeStructureVolume(chunkX + ":" + chunkZ,
-                    -256, 0, -256, 256, 100, 256));
+                    -256, 0, -256, 256, 100, 256, null));
        });
        ExecutorService owner = Executors.newSingleThreadExecutor();
        ForkJoinPool workers = new ForkJoinPool(2);
@@ -544,7 +548,8 @@ public class NativeStructureVolumeIndexTest {
            if (chunkX != originChunkX || chunkZ != originChunkZ) {
                return NativeStructureVolume.NONE;
            }
-            return NativeStructureVolumeSource.appendPieces(null, STRUCTURE_KEY, swampHut(chunkX, chunkZ, 4, 6));
+            return NativeStructureVolumeSource.appendPieces(null, STRUCTURE_KEY, swampHut(chunkX, chunkZ, 4, 6),
                    StructureTerrainSettings.SOURCE, (x, z) -> 63);
        }
    }
@@ -596,7 +601,7 @@ public class NativeStructureVolumeIndexTest {
            return new KList<>(new NativeStructureVolume(
                    chunkX + ":" + chunkZ,
                    0, 0, 0,
-                    15, 255, 15));
+                    15, 255, 15, null));
        }
    }
    private record ScopedEngine(IrisEngine engine, AtomicInteger scopes) {
@@ -223,7 +223,6 @@ public class Iris extends VolmitPlugin implements Listener, ReloadAware {
    private IrisUpdateNotifier updateNotifier;
    private BukkitDebugDump debugDump;
    private volatile SettingsHotloadWatch settingsHotloadWatch;
    private volatile Thread serverLifecycleThread;
    private volatile ServerShutdownBoundary serverShutdownBoundary;
    public static VolmitSender getSender() {
@@ -832,7 +831,6 @@ public class Iris extends VolmitPlugin implements Listener, ReloadAware {
    public void addShutdownHook() {
        removeShutdownHook();
        serverLifecycleThread = Thread.currentThread();
        serverShutdownBoundary = INMS.isBound() ? INMS.get().createServerShutdownBoundary() : null;
        shutdownHook = new Thread(this::runShutdownHook, "Iris-ShutdownHook");
        try {
@@ -1164,7 +1162,7 @@ public class Iris extends VolmitPlugin implements Listener, ReloadAware {
            if (generator == null) {
                continue;
            }
-            IrisToolbelt.beginWorldMaintenance(world, reason, true);
+            IrisToolbelt.beginWorldMaintenance(world, reason);
            if (!deferredShutdownGenerators.contains(generator)) {
                deferredShutdownGenerators.add(generator);
            }
@@ -1176,52 +1174,32 @@ public class Iris extends VolmitPlugin implements Listener, ReloadAware {
        if (!postStopFinisherStarted.compareAndSet(false, true)) {
            return;
        }
-        Thread activeServerThread = serverLifecycleThread;
+        Thread finisher = new Thread(() -> finishRuntimeAfterServerShutdown("post-server-stop"),
-        if (activeServerThread == null) {
+                "Iris-PostStop-Finisher");
            Iris.warn("Iris could not start its post-stop runtime finisher because the server lifecycle thread is unavailable.");
            return;
        }
        Thread finisher = new Thread(() -> {
            if (!awaitServerThreadTermination(activeServerThread)) {
                return;
            }
            finishDeferredRuntimeTeardown("post-server-stop", 30L);
        }, "Iris-PostStop-Finisher");
        finisher.setDaemon(false);
        finisher.start();
    }
    static boolean awaitServerThreadTermination(Thread serverThread) {
        if (serverThread == null || serverThread == Thread.currentThread()) {
            return false;
        }
        try {
            serverThread.join();
            return true;
        } catch (InterruptedException e) {
            Thread.currentThread().interrupt();
            Iris.reportError("Iris post-stop runtime finisher was interrupted.", e);
            return false;
        }
    }
    private void runShutdownHook() {
        if (startupBoundaryRestart.get()) {
            finishDeferredRuntimeTeardown("startup-boundary-restart-hook", 30L);
            return;
        }
        finishRuntimeAfterServerShutdown("shutdown-hook");
    }
    private void finishRuntimeAfterServerShutdown(String reason) {
        if (!awaitServerShutdownBoundary()) {
-            SHUTDOWN_ERRORS.println("[Iris] Paper did not reach its post-world-close boundary; retaining the runtime and plugin class loader until JVM exit.");
+            SHUTDOWN_ERRORS.println("[Iris] The server did not reach its post-world-close boundary; retaining the runtime and plugin class loader until JVM exit.");
            return;
        }
-        finishDeferredRuntimeTeardown("shutdown-hook", 30L);
+        finishDeferredRuntimeTeardown(reason, 30L);
    }
    private boolean awaitServerShutdownBoundary() {
        ServerShutdownBoundary boundary = serverShutdownBoundary;
        if (boundary == null) {
-            return true;
+            return false;
        }
        try {
            return boundary.await(
@@ -1508,12 +1486,15 @@ public class Iris extends VolmitPlugin implements Listener, ReloadAware {
    public int getIrisVersion() {
        String input = getDescription().getVersion();
        int hyphenIndex = input.indexOf('-');
-        if (hyphenIndex != -1) {
+        String release = hyphenIndex < 0 ? input : input.substring(0, hyphenIndex);
-            String result = input.substring(0, hyphenIndex);
+        if (!release.matches("[0-9]+(?:\\.[0-9]+)*")) {
-            result = result.replaceAll("\\.", "");
+            return -1;
-            return Integer.parseInt(result);
+        }
        try {
            return Integer.parseInt(release.replace(".", ""));
        } catch (NumberFormatException invalid) {
            return -1;
        }
        return -1;
    }
    public int getMCVersion() {
@@ -81,7 +81,6 @@ import org.bukkit.FluidCollisionMode;
 import org.bukkit.Location;
 import org.bukkit.World;
 import org.bukkit.entity.Player;
 import org.bukkit.event.inventory.InventoryType;
 import org.bukkit.inventory.Inventory;
 import org.bukkit.util.Vector;
@@ -309,23 +308,33 @@ public class CommandStudio implements DirectorExecutor {
        O<Integer> ta = new O<>();
        ta.set(-1);
-        var sender = sender();
+        VolmitSender sender = sender();
-        var player = player();
+        Player player = player();
-        var engine = engine();
+        Engine engine = engine();
-        ta.set(J.sr(() ->
+        ta.set(J.sr(() -> {
-        {
+            if (!J.runEntity(player, () -> {
-            if (!player.getOpenInventory().getType().equals(InventoryType.CHEST)) {
+                if (player.getOpenInventory().getTopInventory() != inv) {
                    J.csr(ta.get());
                    sender.sendMessage(IrisLanguage.text(BukkitCommandMessages.COMMAND_STUDIO_OPENED_INVENTORY));
                    return;
                }
                if (!add) {
                    inv.clear();
                }
                Location location = player.getLocation();
                try {
                    EngineBukkitOps.addItems(engine, true, inv, tables, InventorySlotType.STORAGE,
                            location.getWorld(), location.getBlockX(), location.getBlockY(), location.getBlockZ());
                } catch (RuntimeException | Error failure) {
                    J.csr(ta.get());
                    Iris.reportError(failure);
                    sender.sendMessage(IrisLanguage.text(BukkitCommandMessagesExtended.COMMAND_STUDIO_CANNOT_ADD_ITEMS_VIRTUAL_INVENTORY_BECAUSE,
                            MessageArgument.untrusted("value", String.valueOf(failure.getMessage()))));
                }
            }, 0, () -> J.csr(ta.get()))) {
                J.csr(ta.get());
                sender.sendMessage(IrisLanguage.text(BukkitCommandMessages.COMMAND_STUDIO_OPENED_INVENTORY));
                return;
            }
            if (!add) {
                inv.clear();
            }
            EngineBukkitOps.addItems(engine, true, inv, tables, InventorySlotType.STORAGE, player.getWorld(), player.getLocation().getBlockX(), player.getLocation().getBlockY(), player.getLocation().getBlockZ());
        }, fast ? 5 : 35));
        sender().sendMessage(IrisLanguage.text(BukkitCommandMessagesExtended.COMMAND_STUDIO_OPENING_INVENTORY_NOW));
@@ -896,14 +896,10 @@ public final class IrisWorldGeneratorResolver {
    }
    private static String dimensionTypeKey(IrisData data, IrisDimension dimension) {
-        return IrisPlatforms.get()
+        return dimension.dimensionTypeResourceKey(
-                .registries()
+                IrisPlatforms.get().registries().generationRegistry(),
-                .generationRegistry()
+                data.getDataFolder().getName()
-                .dimensionTypeResourceKey(
+        );
                        data.getDataFolder().getName(),
                        dimension.getLoadKey(),
                        dimension.getDimensionTypeKey()
                );
    }
    private record LoadedHistory(GenerationHistory history, File activePack) {
@@ -19,6 +19,10 @@
 package art.arcane.iris.world.runtime;
 import art.arcane.iris.api.world.IrisWorldPhase;
 import art.arcane.iris.generation.mantle.CustomBlockOwnership;
 import art.arcane.iris.integration.ExternalDataSVC;
 import art.arcane.iris.spi.IrisServices;
 import art.arcane.volmlib.nativelib.terrain.NativeBlockPoint;
 import art.arcane.iris.pack.datapack.ServerConfigurator;
 import art.arcane.iris.pack.datapack.DatapackIngestService;
 import art.arcane.iris.world.event.IrisEngineHotloadEvent;
@@ -51,6 +55,13 @@ import org.bukkit.World;
 import org.bukkit.WorldBorder;
 public final class BukkitEnginePlatformHooks implements EnginePlatformHooks {
    @Override
    public boolean removeCustomBlock(Engine engine, NativeBlockPoint position, CustomBlockOwnership.Entry entry) {
        ExternalDataSVC service = IrisServices.getOrNull(ExternalDataSVC.class);
        return service != null && service.removeGenerated(
                BukkitWorldBinding.world(engine.getWorld()).getBlockAt(position.x(), position.y(), position.z()), entry);
    }
    @Override
    public CompletableFuture<Void> flushSavedTerrainCapture(Engine engine) {
        return INMS.get().flushSavedTerrainCapture(BukkitWorldBinding.world(engine.getWorld()));
@@ -0,0 +1,46 @@
 {
  "name": "Flat",
  "derivative": "minecraft:snowy_plains",
  "vanillaDerivative": "minecraft:snowy_plains",
  "layers": [
    {
      "minHeight": 1,
      "maxHeight": 1,
      "palette": [
        {
          "block": "minecraft:lime_wool"
        }
      ]
    },
    {
      "minHeight": 384,
      "maxHeight": 384,
      "palette": [
        {
          "block": "minecraft:green_concrete"
        }
      ]
    }
  ],
  "generators": [
    {
      "generator": "flat",
      "min": 96,
      "max": 96
    }
  ],
  "decorators": [
    {
      "palette": [
        {
          "block": "craftengine:default/flower_basket",
          "data": {
            "variant": "ground"
          }
        }
      ],
      "chance": 1,
      "forcePlace": true
    }
  ]
 }
@@ -0,0 +1,39 @@
 {
  "name": "CraftEngine Imported Feature Fixture",
  "version": 1,
  "mode": {
    "type": "OVERWORLD"
  },
  "regions": [
    "flat"
  ],
  "focusRegion": "flat",
  "focus": "flat",
  "landChance": 1,
  "environment": "NORMAL",
  "dimensionHeight": {
    "min": -64,
    "max": 320
  },
  "logicalHeight": 384,
  "fluidHeight": 0,
  "bedrock": false,
  "rockPalette": {
    "palette": [
      {
        "block": "minecraft:red_concrete"
      }
    ]
  },
  "importedStructures": {
    "disabled": [
      "minecraft:"
    ]
  },
  "importedFeatures": {
    "enabled": true,
    "steps": [
      "TOP_LAYER_MODIFICATION"
    ]
  }
 }
@@ -0,0 +1,15 @@
 {
  "interpolator": {
    "function": "NONE",
    "horizontalScale": 1
  },
  "seed": 310,
  "composite": [
    {
      "seed": 310,
      "style": {
        "style": "FLAT"
      }
    }
  ]
 }
@@ -0,0 +1,12 @@
 {
  "name": "Flat",
  "landBiomes": [
    "flat"
  ],
  "seaBiomes": [
    "flat"
  ],
  "shoreBiomes": [
    "flat"
  ]
 }
@@ -0,0 +1,35 @@
 plugins {
    id 'java'
 }
 version = '1.0.0'
 repositories {
    mavenCentral()
    maven { url = 'https://repo.papermc.io/repository/maven-public/' }
 }
 dependencies {
    compileOnly files(providers.gradleProperty('irisJar').get())
    compileOnly files(providers.gradleProperty('craftEngineJar').get())
    compileOnly 'io.papermc.paper:paper-api:26.1.2.build.74-stable'
 }
 java {
    toolchain.languageVersion = JavaLanguageVersion.of(25)
 }
 sourceSets {
    main {
        java.srcDirs = ['src']
        resources.srcDirs = ['resources']
    }
 }
 tasks.withType(JavaCompile).configureEach {
    options.compilerArgs += '-parameters'
 }
 tasks.named('jar') {
    archiveBaseName = 'IrisCraftEngineNativeFixture'
 }
@@ -0,0 +1,12 @@
 name: IrisCraftEngineNativeFixture
 version: 1.0.0
 main: art.arcane.iris.fixture.CraftEngineNativeFixture
 api-version: '26.1.2'
 folia-supported: true
 depend: [Iris, CraftEngine]
 commands:
  iriscenative:
    permission: iriscenative.run
 permissions:
  iriscenative.run:
    default: op
@@ -0,0 +1 @@
 rootProject.name = 'iris-craftengine-native-fixture'
@@ -0,0 +1,385 @@
 package art.arcane.iris.fixture;
 import art.arcane.iris.generation.block.IrisCustomData;
 import art.arcane.iris.generation.block.TileData;
 import art.arcane.iris.generation.mantle.DeferredPlacementRecords;
 import art.arcane.iris.generation.mantle.CustomBlockOwnership;
 import art.arcane.iris.generation.runtime.Engine;
 import art.arcane.iris.integration.ExternalDataSVC;
 import art.arcane.iris.integration.Identifier;
 import art.arcane.iris.platform.generation.EngineBukkitOps;
 import art.arcane.iris.spi.IrisServices;
 import art.arcane.iris.world.IrisCreator;
 import art.arcane.iris.world.IrisToolbelt;
 import art.arcane.iris.world.storage.matter.TileWrapper;
 import art.arcane.iris.world.task.J;
 import art.arcane.volmlib.nativelib.terrain.NativeBlockChangeSet;
 import art.arcane.volmlib.util.mantle.flag.MantleFlag;
 import art.arcane.volmlib.util.mantle.runtime.Mantle;
 import art.arcane.volmlib.util.matter.Matter;
 import net.momirealms.craftengine.bukkit.api.CraftEngineBlocks;
 import net.momirealms.craftengine.bukkit.api.CraftEngineFurniture;
 import net.momirealms.craftengine.core.util.Key;
 import org.bukkit.Bukkit;
 import org.bukkit.Chunk;
 import org.bukkit.GameMode;
 import org.bukkit.Location;
 import org.bukkit.Material;
 import org.bukkit.NamespacedKey;
 import org.bukkit.World;
 import org.bukkit.block.Block;
 import org.bukkit.block.data.BlockData;
 import org.bukkit.command.Command;
 import org.bukkit.command.CommandSender;
 import org.bukkit.entity.Entity;
 import org.bukkit.entity.Player;
 import org.bukkit.plugin.java.JavaPlugin;
 import java.util.ArrayList;
 import java.util.List;
 import java.util.concurrent.CompletableFuture;
 import java.util.logging.Level;
 public final class CraftEngineNativeFixture extends JavaPlugin {
    private static final NamespacedKey WORLD_KEY = new NamespacedKey("iris", "ce_native_probe");
    private static final NamespacedKey FEATURE_WORLD_KEY = new NamespacedKey("iris", "ce_native_feature_probe");
    private static final int TEST_Y = 180;
    private static final int TEST_Z = 8;
    private static final String BLOCK_ID = "craftengine:default/topaz_ore";
    private static final String FURNITURE_ID = "craftengine:default/flower_basket[variant=ground]";
    @Override
    public boolean onCommand(CommandSender sender, Command command, String label, String[] arguments) {
        if (!(sender instanceof Player player) || arguments.length != 1) {
            sender.sendMessage("CE_FAILED Use /iriscenative prepare|pending|neighbor|loaded|features|restart from a player");
            return true;
        }
        if (arguments[0].equals("prepare")) {
            player.setGameMode(GameMode.CREATIVE);
            prepare(player);
            return true;
        }
        if (arguments[0].equals("features")) {
            importedFeatures(player);
            return true;
        }
        World world = Bukkit.getWorld(WORLD_KEY);
        if (world == null) {
            fail(player, new IllegalStateException("Fixture world has not been created"));
            return true;
        }
        if (arguments[0].equals("restart")) {
            loadChunks().thenCompose(ignored -> J.runRegionFuture(world, 0, 0,
                    () -> later(player, world, () -> restarted(player, world))))
                    .whenComplete((ignored, failure) -> {
                        if (failure != null) {
                            fail(player, failure);
                        }
                    });
            return true;
        }
        J.runRegionFuture(world, 0, 0, () -> {
            switch (arguments[0]) {
                case "pending" -> pending(player, world);
                case "neighbor" -> neighbor(player, world);
                case "loaded" -> invalidateLoaded(player, world, IrisToolbelt.access(world).getEngine());
                default -> throw new IllegalArgumentException("Unknown fixture operation");
            }
        }).whenComplete((ignored, failure) -> {
            if (failure != null) {
                fail(player, failure);
            }
        });
        return true;
    }
    private void prepare(Player player) {
        CompletableFuture.runAsync(() -> {
            if (Bukkit.getWorld(WORLD_KEY) == null) {
                try {
                    new IrisCreator().name(WORLD_KEY.toString()).dimension("ce-native-fixture")
                            .seed(78264193L).create();
                } catch (Exception failure) {
                    throw new IllegalStateException("Could not create CraftEngine fixture world", failure);
                }
            }
        }).thenCompose(ignored -> loadChunks()).thenCompose(ignored -> {
            World world = Bukkit.getWorld(WORLD_KEY);
            return J.runRegionFuture(world, 0, 0, () -> preparePlatform(world));
        }).thenAccept(ignored -> {
            World world = Bukkit.getWorld(WORLD_KEY);
            if (!J.runEntity(player, () -> player.teleportAsync(new Location(world, 8.5, TEST_Y + 3, 8.5))
                    .whenComplete((teleported, failure) -> {
                        if (failure != null || !Boolean.TRUE.equals(teleported)) {
                            fail(player, failure == null ? new IllegalStateException("Fixture teleport failed") : failure);
                            return;
                        }
                        player.sendMessage("CE_READY world=" + WORLD_KEY + " folia=" + J.isFolia());
                    }))) {
                throw new IllegalStateException("Could not schedule fixture teleport");
            }
        }).exceptionally(failure -> {
            fail(player, failure);
            return null;
        });
    }
    private void importedFeatures(Player player) {
        CompletableFuture.runAsync(() -> {
            if (Bukkit.getWorld(FEATURE_WORLD_KEY) == null) {
                try {
                    new IrisCreator().name(FEATURE_WORLD_KEY.toString()).dimension("ce-native-feature-fixture")
                            .seed(78264193L).create();
                } catch (Exception failure) {
                    throw new IllegalStateException("Could not create imported feature fixture world", failure);
                }
            }
        }).thenCompose(ignored -> {
            World world = Bukkit.getWorld(FEATURE_WORLD_KEY);
            return world.getChunkAtAsync(0, 0, true);
        }).thenCompose(chunk -> J.runRegionFuture(chunk.getWorld(), 0, 0, () -> {
            World world = chunk.getWorld();
            Engine engine = IrisToolbelt.access(world).getEngine();
            int snow = 0;
            int pending = 0;
            for (int x = 0; x < 16; x++) {
                for (int z = 0; z < 16; z++) {
                    if (world.getBlockAt(x, 97, z).getType() == Material.SNOW) {
                        snow++;
                    }
                    if (engine.getMantle().getMantle().get(x, 97 - engine.getMinHeight(), z, Identifier.class) != null) {
                        pending++;
                    }
                }
            }
            require(snow == 256, "Imported snow feature did not cover all 256 test columns: " + snow);
            require(pending == 0, "Imported feature left pending furniture records: " + pending);
            for (Entity entity : chunk.getEntities()) {
                require(!CraftEngineFurniture.isFurniture(entity), "Imported snow feature left generated furniture");
            }
            if (!J.runEntity(player, () -> player.teleportAsync(new Location(world, 8.5, 101, 8.5))
                    .whenComplete((teleported, failure) -> {
                        if (failure != null || !Boolean.TRUE.equals(teleported)) {
                            fail(player, failure == null ? new IllegalStateException("Feature world teleport failed") : failure);
                            return;
                        }
                        player.sendMessage("CE_FEATURES snow=256 pending=0 furniture=0");
                    }))) {
                throw new IllegalStateException("Could not schedule feature world teleport");
            }
        })).exceptionally(failure -> {
            fail(player, failure);
            return null;
        });
    }
    private CompletableFuture<Void> loadChunks() {
        World world = Bukkit.getWorld(WORLD_KEY);
        require(world != null && IrisToolbelt.isIrisWorld(world), "Fixture must use a real Iris world");
        List<CompletableFuture<Void>> chunks = new ArrayList<>(15);
        for (int x = -1; x <= 3; x++) {
            for (int z = -1; z <= 1; z++) {
                chunks.add(world.getChunkAtAsync(x, z, true).thenCompose(chunk ->
                        J.runRegionFuture(world, chunk.getX(), chunk.getZ(), () -> chunk.addPluginChunkTicket(this))));
            }
        }
        return CompletableFuture.allOf(chunks.toArray(CompletableFuture[]::new));
    }
    private void preparePlatform(World world) {
        require(CraftEngineBlocks.byId(Key.of("default:topaz_ore")) != null, "CraftEngine default block is missing");
        require(CraftEngineFurniture.byId(Key.of("default:flower_basket")) != null, "CraftEngine furniture is missing");
        for (int chunkX = 0; chunkX <= 2; chunkX++) {
            for (Entity entity : world.getChunkAt(chunkX, 0).getEntities()) {
                if (CraftEngineFurniture.isFurniture(entity)) {
                    CraftEngineFurniture.remove(entity, false, false);
                }
            }
        }
        for (int x = 0; x <= 47; x++) {
            for (int z = 2; z <= 14; z++) {
                world.getBlockAt(x, TEST_Y - 1, z).setType(Material.STONE, false);
                for (int y = TEST_Y; y <= TEST_Y + 5; y++) {
                    world.getBlockAt(x, y, z).setType(Material.AIR, false);
                }
            }
        }
    }
    private void pending(Player player, World world) {
        Engine engine = IrisToolbelt.access(world).getEngine();
        Mantle<Matter> mantle = engine.getMantle().getMantle();
        queue(engine, world, 2, BLOCK_ID);
        queue(engine, world, 4, BLOCK_ID);
        queue(engine, world, 6, BLOCK_ID);
        queue(engine, world, 8, BLOCK_ID);
        queue(engine, world, 10, FURNITURE_ID);
        queue(engine, world, 12, FURNITURE_ID);
        Block chest = world.getBlockAt(14, TEST_Y, TEST_Z);
        chest.setType(Material.CHEST, false);
        mantle.set(14, TEST_Y - engine.getMinHeight(), TEST_Z, new TileWrapper(TileData.getTileState(chest, false)));
        world.getBlockAt(4, TEST_Y, TEST_Z).setType(Material.AIR, false);
        world.getBlockAt(6, TEST_Y, TEST_Z).setType(Material.COBBLESTONE, false);
        NativeBlockChangeSet changes = DeferredPlacementRecords.track(engine, bounds(world));
        changes.add(8, TEST_Y, TEST_Z);
        changes.add(12, TEST_Y - 1, TEST_Z);
        changes.add(12, TEST_Y, TEST_Z);
        changes.add(14, TEST_Y, TEST_Z);
        world.getBlockAt(8, TEST_Y, TEST_Z).setType(Material.AIR, false);
        world.getBlockAt(12, TEST_Y - 1, TEST_Z).setType(Material.AIR, false);
        chest.setType(Material.COBBLESTONE, false);
        DeferredPlacementRecords.invalidate(engine, changes);
        require(record(engine, 8, Identifier.class) == null, "Native cut retained a pending custom record");
        require(record(engine, 12, Identifier.class) == null, "Flatten column retained pending furniture");
        require(record(engine, 14, TileWrapper.class) == null, "Native wall retained pending chest data");
        require(record(engine, 2, Identifier.class) != null, "Native writes invalidated an untouched custom record");
        replay(engine, world, 0);
        CustomBlockOwnership ownership = record(engine, 10, CustomBlockOwnership.class);
        require(record(engine, 2, Identifier.class) == null, "Custom materialization did not consume pending records");
        require(CraftEngineBlocks.isCustomBlock(world.getBlockAt(2, TEST_Y, TEST_Z)), "Intact custom block was not placed");
        require(world.getBlockAt(4, TEST_Y, TEST_Z).getType().isAir(), "Cut custom block was resurrected");
        require(world.getBlockAt(6, TEST_Y, TEST_Z).getType() == Material.COBBLESTONE, "Custom block replaced native wall");
        require(world.getBlockAt(8, TEST_Y, TEST_Z).getType().isAir(), "Invalidated custom block was resurrected");
        require(chest.getType() == Material.COBBLESTONE, "Chest data replaced native wall");
        later(player, world, () -> {
            int intactFurniture = furnitureAt(world, 10);
            require(intactFurniture == 1, "Intact furniture count is " + intactFurniture
                    + "; pending=" + record(engine, 10, Identifier.class)
                    + "; ownership=" + ownership
                    + "; chunkEntities=" + world.getChunkAt(0, 0).getEntities().length);
            require(furnitureAt(world, 12) == 0, "Flattened furniture was resurrected");
            player.sendMessage("CE_PENDING intact=1 air=1 wall=1 invalidated=1 flatten=1 chest=1 furniture=1");
        });
    }
    private void neighbor(Player player, World world) {
        Engine engine = IrisToolbelt.access(world).getEngine();
        queue(engine, world, 18, FURNITURE_ID);
        queue(engine, world, 20, FURNITURE_ID);
        queue(engine, world, 22, FURNITURE_ID);
        queue(engine, world, 42, FURNITURE_ID);
        replay(engine, world, 1);
        replay(engine, world, 2);
        world.getBlockAt(40, TEST_Y, TEST_Z).setType(Material.DIAMOND_BLOCK, false);
        later(player, world, () -> {
            require(furnitureAt(world, 18) == 1 && furnitureAt(world, 20) == 1
                    && furnitureAt(world, 22) == 1, "Neighbor furniture did not materialize");
            require(furnitureAt(world, 42) == 1 && record(engine, 42, CustomBlockOwnership.class) != null,
                    "Regeneration target furniture did not materialize with saved ownership");
            if (!J.runEntity(player, () -> player.teleportAsync(new Location(world, 40.5, TEST_Y + 3, TEST_Z + 0.5))
                    .whenComplete((teleported, failure) -> {
                        if (failure != null || !Boolean.TRUE.equals(teleported)) {
                            fail(player, failure == null ? new IllegalStateException("Regeneration target teleport failed") : failure);
                            return;
                        }
                        player.sendMessage("CE_NEIGHBOR_READY chunk=2,0 furniture=3 target=1");
                    }))) {
                throw new IllegalStateException("Could not schedule regeneration target teleport");
            }
        });
    }
    private void invalidateLoaded(Player player, World world, Engine engine) {
        require(world.getBlockAt(40, TEST_Y, TEST_Z).getType().isAir(), "Adjacent target chunk did not regenerate");
        require(furnitureAt(world, 18) == 1 && furnitureAt(world, 20) == 1
                && furnitureAt(world, 22) == 1, "Neighbor furniture did not materialize");
        NativeBlockChangeSet changes = DeferredPlacementRecords.track(engine, bounds(world));
        changes.add(18, TEST_Y - 1, TEST_Z);
        changes.add(18, TEST_Y, TEST_Z);
        changes.add(22, TEST_Y, TEST_Z);
        world.getBlockAt(18, TEST_Y - 1, TEST_Z).setType(Material.AIR, false);
        world.getBlockAt(18, TEST_Y, TEST_Z).setType(Material.COBBLESTONE, false);
        DeferredPlacementRecords.invalidate(engine, changes);
        require(CraftEngineFurniture.place(new Location(world, 22.5, TEST_Y, TEST_Z + 0.5),
                Key.of("default:flower_basket"), "ground", false) != null,
                "Could not place replacement furniture before scheduled cleanup");
        later(player, world, () -> {
            require(furnitureAt(world, 42) == 0, "Regeneration retained target chunk furniture");
            require(furnitureAt(world, 18) == 0, "Native write left materialized neighbor furniture");
            require(furnitureAt(world, 20) == 1, "Native write removed untouched neighbor furniture");
            require(furnitureAt(world, 22) == 1, "Native cleanup removed replacement furniture or retained the old one");
            require(world.getBlockAt(18, TEST_Y, TEST_Z).getType() == Material.COBBLESTONE,
                    "Furniture cleanup replaced the native wall");
            player.sendMessage("CE_LOADED removed=1 untouched=1 replacement=1 wall=1 target=1");
        });
    }
    private void restarted(Player player, World world) {
        require(furnitureAt(world, 20) == 1, "Generated neighbor furniture did not survive restart");
        require(furnitureAt(world, 10) == 1, "Untouched furniture did not survive restart");
        Engine engine = IrisToolbelt.access(world).getEngine();
        NativeBlockChangeSet changes = DeferredPlacementRecords.track(engine, bounds(world));
        changes.add(20, TEST_Y, TEST_Z);
        DeferredPlacementRecords.invalidate(engine, changes);
        later(player, world, () -> {
            require(furnitureAt(world, 20) == 0, "Persisted furniture ownership was not invalidated after restart");
            require(furnitureAt(world, 10) == 1, "Restart cleanup removed untouched furniture");
            player.sendMessage("CE_RESTART removed=1 untouched=1");
        });
    }
    private void queue(Engine engine, World world, int x, String identifier) {
        ExternalDataSVC service = IrisServices.get(ExternalDataSVC.class);
        BlockData data = service.getBlockData(Identifier.fromString(identifier)).orElseThrow();
        require(data instanceof IrisCustomData, "Iris did not resolve real CraftEngine content: " + identifier);
        IrisCustomData custom = (IrisCustomData) data;
        world.getBlockAt(x, TEST_Y, TEST_Z).setBlockData(custom.getBase(), false);
        engine.getMantle().getMantle().set(x, TEST_Y - engine.getMinHeight(), TEST_Z, custom.getCustom());
    }
    private <T> T record(Engine engine, int x, Class<T> type) {
        return engine.getMantle().getMantle().get(x, TEST_Y - engine.getMinHeight(), TEST_Z, type);
    }
    private void replay(Engine engine, World world, int chunkX) {
        Mantle<Matter> mantle = engine.getMantle().getMantle();
        for (int x = chunkX - 1; x <= chunkX + 1; x++) {
            for (int z = -1; z <= 1; z++) {
                require(world.isChunkLoaded(x, z), "Replay neighbor is not loaded: " + x + "," + z);
            }
        }
        require(mantle.isLoaded(world.getChunkAt(chunkX, 0)), "Replay mantle chunk is not loaded: " + chunkX);
        mantle.flag(chunkX, 0, MantleFlag.ETCHED, false);
        mantle.flag(chunkX, 0, MantleFlag.TILE, false);
        mantle.flag(chunkX, 0, MantleFlag.CUSTOM, false);
        EngineBukkitOps.updateChunk(engine, world.getChunkAt(chunkX, 0), mantle);
    }
    private int furnitureAt(World world, int x) {
        int count = 0;
        for (Entity entity : world.getChunkAt(x >> 4, TEST_Z >> 4).getEntities()) {
            Location location = entity.getLocation();
            if (location.getBlockX() == x && location.getBlockY() == TEST_Y && location.getBlockZ() == TEST_Z
                    && CraftEngineFurniture.getLoadedFurnitureByMetaEntity(entity) != null) {
                count++;
            }
        }
        return count;
    }
    private void later(Player player, World world, Runnable assertion) {
        Bukkit.getRegionScheduler().runDelayed(this, new Location(world, 8, TEST_Y, TEST_Z), task -> {
            try {
                assertion.run();
            } catch (Throwable failure) {
                fail(player, failure);
            }
        }, 20);
    }
    private NativeBlockChangeSet.Bounds bounds(World world) {
        return new NativeBlockChangeSet.Bounds(-1, -1, 3, 1, world.getMinHeight(), world.getMaxHeight() - world.getMinHeight());
    }
    private void require(boolean condition, String message) {
        if (!condition) {
            throw new IllegalStateException(message);
        }
    }
    private void fail(CommandSender sender, Throwable failure) {
        getLogger().log(Level.SEVERE, "CraftEngine native placement assertion failed", failure);
        sender.sendMessage("CE_FAILED " + failure.getMessage());
    }
 }
@@ -0,0 +1,32 @@
 {
  "name": "Flat",
  "derivative": "minecraft:plains",
  "vanillaDerivative": "minecraft:plains",
  "layers": [
    {
      "minHeight": 1,
      "maxHeight": 1,
      "palette": [
        {
          "block": "minecraft:lime_wool"
        }
      ]
    },
    {
      "minHeight": 384,
      "maxHeight": 384,
      "palette": [
        {
          "block": "minecraft:green_concrete"
        }
      ]
    }
  ],
  "generators": [
    {
      "generator": "flat",
      "min": 96,
      "max": 96
    }
  ]
 }
@@ -0,0 +1,33 @@
 {
  "name": "CraftEngine Native Fixture",
  "version": 1,
  "mode": {
    "type": "OVERWORLD"
  },
  "regions": [
    "flat"
  ],
  "focusRegion": "flat",
  "focus": "flat",
  "landChance": 1,
  "environment": "NORMAL",
  "dimensionHeight": {
    "min": -64,
    "max": 320
  },
  "logicalHeight": 384,
  "fluidHeight": 0,
  "bedrock": false,
  "rockPalette": {
    "palette": [
      {
        "block": "minecraft:red_concrete"
      }
    ]
  },
  "importedStructures": {
    "disabled": [
      "minecraft:"
    ]
  }
 }
@@ -0,0 +1,15 @@
 {
  "interpolator": {
    "function": "NONE",
    "horizontalScale": 1
  },
  "seed": 310,
  "composite": [
    {
      "seed": 310,
      "style": {
        "style": "FLAT"
      }
    }
  ]
 }
@@ -0,0 +1,12 @@
 {
  "name": "Flat",
  "landBiomes": [
    "flat"
  ],
  "seaBiomes": [
    "flat"
  ],
  "shoreBiomes": [
    "flat"
  ]
 }
@@ -0,0 +1,15 @@
 import { readFile } from 'node:fs/promises'
 import path from 'node:path'
 export default {
  name: 'iris-craftengine-native-restart',
  description: 'Verify persisted generated furniture ownership after a full server restart.',
  async run(context) {
    const source = await readFile(path.join(context.server.directory, '.server-source'), 'utf8')
    context.expect(/^isolated=true\s*$/m.test(source), 'CraftEngine regression requires an isolated instance')
    await context.step('native writes remove persisted ownership after restart', async () => {
      const response = await context.command('/iriscenative restart', /CE_RESTART|CE_FAILED/, 60000)
      context.expect(response.includes('CE_RESTART removed=1 untouched=1'), response)
    })
  }
 }
@@ -0,0 +1,49 @@
 import { readFile } from 'node:fs/promises'
 import path from 'node:path'
 export default {
  name: 'iris-craftengine-native',
  description: 'Verify deferred native invalidation and loaded neighbor cleanup with real Iris and CraftEngine.',
  async run(context) {
    const source = await readFile(path.join(context.server.directory, '.server-source'), 'utf8')
    context.expect(/^isolated=true\s*$/m.test(source), 'CraftEngine regression requires an isolated instance')
    await context.step('create and enter a real Iris world with CraftEngine content', async () => {
      const response = await context.command('/iriscenative prepare', /CE_READY|CE_FAILED/, 180000)
      context.expect(response.includes('CE_READY'), response)
    })
    await context.step('native writes remove pending block, chest, and flatten furniture records', async () => {
      const response = await context.command('/iriscenative pending', /CE_PENDING|CE_FAILED/, 60000)
      context.expect(response.includes('CE_PENDING intact=1 air=1 wall=1 invalidated=1 flatten=1 chest=1 furniture=1'), response)
      await context.waitUntil(() => {
        const origin = context.bot.entity.position.floored()
        const cut = context.bot.blockAt(origin.set(4, 180, 8))
        const wall = context.bot.blockAt(origin.set(6, 180, 8))
        const invalidated = context.bot.blockAt(origin.set(8, 180, 8))
        const chest = context.bot.blockAt(origin.set(14, 180, 8))
        return cut?.name === 'air' && wall?.name === 'cobblestone'
          && invalidated?.name === 'air' && chest?.name === 'cobblestone'
      }, { label: 'Client observes retained native air and walls', timeoutMs: 30000, intervalMs: 100 })
    })
    await context.step('regeneration removes target furniture and preserves neighbor ownership', async () => {
      const ready = await context.command('/iriscenative neighbor', /CE_NEIGHBOR_READY|CE_FAILED/, 30000)
      context.expect(ready.includes('CE_NEIGHBOR_READY chunk=2,0 furniture=3 target=1'), ready)
      const regenerated = await context.command('/iris developer regen radius=0', /Regen complete:|Regen failed:/, 90000)
      context.expect(regenerated.includes('Regen complete:'), regenerated)
      const response = await context.command('/iriscenative loaded', /CE_LOADED|CE_FAILED/, 30000)
      context.expect(response.includes('CE_LOADED removed=1 untouched=1 replacement=1 wall=1 target=1'), response)
    })
    await context.step('imported snow features replace generated furniture records', async () => {
      const response = await context.command('/iriscenative features', /CE_FEATURES|CE_FAILED/, 180000)
      context.expect(response.includes('CE_FEATURES snow=256 pending=0 furniture=0'), response)
      await context.waitUntil(() => {
        const position = context.bot.entity.position.floored()
        for (let x = 0; x < 16; x++) {
          for (let z = 0; z < 16; z++) {
            if (context.bot.blockAt(position.set(x, 97, z))?.name !== 'snow') return false
          }
        }
        return true
      }, { label: 'Client observes 256 imported snow layers', timeoutMs: 30000, intervalMs: 100 })
    })
  }
 }
@@ -2,6 +2,7 @@ name: IrisNativeLifecycleFixture
 version: 1.0.0
 main: art.arcane.iris.fixture.NativeLifecycleFixture
 api-version: '26.1.2'
 folia-supported: true
 depend: [Iris]
 commands:
  irislifecycle:
@@ -1,8 +1,12 @@
 package art.arcane.iris.fixture;
 import art.arcane.iris.Iris;
 import art.arcane.volmlib.nativelib.NativeAdapters;
 import art.arcane.iris.world.runtime.RuntimeInjection;
 import art.arcane.iris.generation.runtime.Engine;
 import art.arcane.iris.structure.placement.IrisStructureLocator;
 import art.arcane.iris.world.IrisCreator;
 import art.arcane.iris.world.task.J;
 import art.arcane.iris.world.IrisToolbelt;
 import art.arcane.iris.world.IrisWorldStorage;
 import art.arcane.iris.world.WorldCreatorCompat;
@@ -13,6 +17,15 @@ import org.bukkit.entity.Player;
 import org.bukkit.configuration.file.YamlConfiguration;
 import org.bukkit.Material;
 import org.bukkit.block.Biome;
 import org.bukkit.block.Container;
 import org.bukkit.loot.Lootable;
 import org.bukkit.loot.LootTable;
 import org.bukkit.inventory.Inventory;
 import org.bukkit.inventory.ItemStack;
 import org.bukkit.inventory.meta.MapMeta;
 import org.bukkit.map.MapView;
 import org.bukkit.generator.structure.Structure;
 import org.bukkit.util.StructureSearchResult;
 import art.arcane.volmlib.nativelib.terrain.NativeTerrainAccess;
 import art.arcane.volmlib.nativelib.terrain.NativeStructureReader;
 import art.arcane.volmlib.nativelib.terrain.NativeWorldRuntime;
@@ -38,12 +51,15 @@ public final class NativeLifecycleFixture extends JavaPlugin implements WorldRun
    private static final NamespacedKey WORLD_KEY = NamespacedKey.minecraft("native_lifecycle_probe");
    private static final NamespacedKey TERRAIN_KEY = new NamespacedKey("iris", "native_terrain_probe");
    private static final NamespacedKey COMMAND_KEY = new NamespacedKey("iris", "lifecycle_probe");
    private static final NamespacedKey TREASURE_KEY = new NamespacedKey("iris", "treasure_map_probe");
    private static final long WORLD_SEED = 78264193L;
    private NativeWorldRuntime runtime;
    private TreasureLootChecks treasureLootChecks;
    @Override
    public void onEnable() {
        runtime = NativeAdapters.require(NativeWorldRuntime.class);
        treasureLootChecks = new TreasureLootChecks(this);
        NativeTerrainAccess terrain = NativeAdapters.require(NativeTerrainAccess.class);
        getLogger().info("Native lifecycle ready: " + runtime.description()
                + "; terrain provider=" + terrain.getClass().getName());
@@ -56,12 +72,32 @@ public final class NativeLifecycleFixture extends JavaPlugin implements WorldRun
    @Override
    public boolean onCommand(CommandSender sender, Command command, String label, String[] arguments) {
-        if (arguments.length != 1) {
+        if (arguments.length == 0) {
            sender.sendMessage("Use /irislifecycle create|unload|status|structures|terrain-create|terrain-check|terrain-unload|lifecycle-status|lifecycle-entry");
            return true;
        }
        try {
            switch (arguments[0]) {
                case "treasure-map-create" -> createTreasureMapWorld(sender);
                case "treasure-map-limit" -> runTreasureRegion(sender, () -> checkTreasureMapLimit(sender));
                case "treasure-map-chest" -> {
                    if (arguments.length != 3) {
                        throw new IllegalArgumentException("Use treasure-map-chest <destination> <CHEST|COPPER_CHEST>");
                    }
                    runTreasureRegion(sender, () -> prepareTreasureMapChest(sender, arguments[1], arguments[2]));
                }
                case "treasure-map-inspect" -> {
                    if (arguments.length != 2) {
                        throw new IllegalArgumentException("Use treasure-map-inspect <destination>");
                    }
                    runTreasureRegion(sender, () -> inspectTreasureMapChest(sender, arguments[1]));
                }
                case "treasure-map-check" -> runTreasureRegion(sender, () -> verifyTreasureMapLoot(sender));
                case "treasure-extra-check" -> runTreasureRegion(sender, () -> treasureLootChecks.verify(sender));
                case "treasure-region-check" -> runTreasureRegion(sender, () -> treasureLootChecks.verifyRegion(sender));
                case "treasure-reload-before" -> runTreasureRegion(sender, () -> treasureLootChecks.verifyReload(sender, false));
                case "treasure-reload-after" -> runTreasureRegion(sender, () -> treasureLootChecks.verifyReload(sender, true));
                case "treasure-resources" -> treasureLootChecks.reportResourceReloads(sender);
                case "create" -> create(sender);
                case "unload" -> unload(sender);
                case "structures" -> structures(sender);
@@ -80,6 +116,177 @@ public final class NativeLifecycleFixture extends JavaPlugin implements WorldRun
        return true;
    }
    private void createTreasureMapWorld(CommandSender sender) {
        if (!(sender instanceof Player player)) {
            throw new IllegalStateException("Treasure map fixture requires a player");
        }
        runTreasureRegion(sender, () -> prepareTreasureMapWorld(player));
    }
    private void runTreasureRegion(CommandSender sender, Runnable task) {
        ensureTreasureMapWorld()
                .thenCompose(ignored -> J.runRegionFuture(Bukkit.getWorld(TREASURE_KEY), 0, 0, task))
                .whenComplete((ignored, failure) -> {
                    if (failure != null) {
                        fail(sender, failure);
                    }
                });
    }
    private CompletableFuture<?> ensureTreasureMapWorld() {
        if (Bukkit.getWorld(TREASURE_KEY) != null) {
            return CompletableFuture.completedFuture(null);
        }
        if (WorldCreatorCompat.persistentLevelRoot(TREASURE_KEY).exists()) {
            return Iris.instance.worldReconciler().loadWorld(ServerProperties.BUKKIT_YML, TREASURE_KEY.toString());
        }
        return runAsync(() -> {
            try {
                new IrisCreator().name(TREASURE_KEY.toString()).dimension("treasure-map-fixture")
                        .seed(WORLD_SEED).create();
            } catch (Exception failure) {
                throw new IllegalStateException("Treasure map fixture creation failed", failure);
            }
        });
    }
    private void prepareTreasureMapWorld(Player player) {
        World world = Bukkit.getWorld(TREASURE_KEY);
        if (world == null || !IrisToolbelt.isIrisWorld(world) || world.getSeed() != WORLD_SEED
                || !"treasure-map-fixture".equals(IrisToolbelt.access(world).getEngine().getDimension().getLoadKey())) {
            throw new IllegalStateException("Treasure map fixture world identity is invalid");
        }
        for (int x = 0; x <= 8; x++) {
            for (int z = 0; z <= 8; z++) {
                world.getBlockAt(x, 160, z).setType(Material.STONE, false);
                for (int y = 161; y <= 164; y++) {
                    world.getBlockAt(x, y, z).setType(Material.AIR, false);
                }
            }
        }
        if (!J.runEntity(player, () -> player.teleportAsync(new Location(world, 0.5, 161, 0.5)).whenComplete((teleported, failure) -> {
            if (failure != null) {
                fail(player, failure);
            } else if (!Boolean.TRUE.equals(teleported)) {
                fail(player, new IllegalStateException("Treasure map fixture teleport failed"));
            } else {
                player.sendMessage("TREASURE_MAP_READY world=" + TREASURE_KEY
                        + " version=" + Bukkit.getMinecraftVersion() + " folia=" + J.isFolia());
            }
        }))) {
            throw new IllegalStateException("Could not schedule treasure map fixture teleport");
        }
    }
    private void checkTreasureMapLimit(CommandSender sender) {
        World world = Bukkit.getWorld(TREASURE_KEY);
        if (world == null) {
            throw new IllegalStateException("Treasure map fixture world is absent");
        }
        Engine engine = IrisToolbelt.access(world).getEngine();
        IrisStructureLocator.LocateResult located = IrisStructureLocator.locateInPlacementRings(
                engine, "minecraft:buried_treasure", 2, 2, 50, (x, z) -> true);
        if (located.status() != IrisStructureLocator.LocateStatus.SEARCH_LIMIT_REACHED) {
            throw new IllegalStateException("Blocked treasure placement returned " + located.status());
        }
        sender.sendMessage("TREASURE_MAP_LIMIT status=" + located.status());
    }
    private void prepareTreasureMapChest(CommandSender sender, String destination, String material) {
        World world = Bukkit.getWorld(TREASURE_KEY);
        treasureMapChest(world, destination, material);
        sender.sendMessage("TREASURE_MAP_CHEST destination=" + destination + " material=" + material);
    }
    private Container treasureMapChest(World world, String destination, String material) {
        requireTreasureDestination(destination);
        if (!List.of("CHEST", "COPPER_CHEST").contains(material)) {
            throw new IllegalArgumentException("Unknown treasure map container: " + material);
        }
        LootTable loot = Bukkit.getLootTable(new NamespacedKey("iris_qa", destination));
        if (loot == null) {
            throw new IllegalStateException("Treasure map loot table is absent: " + destination);
        }
        world.getBlockAt(2, 161, 2).setType(Material.AIR, false);
        world.getBlockAt(2, 161, 2).setType(Material.valueOf(material), false);
        Container chest = (Container) world.getBlockAt(2, 161, 2).getState();
        ((Lootable) chest).setLootTable(loot);
        ((Lootable) chest).setSeed(WORLD_SEED);
        if (!chest.update(true, false)) {
            throw new IllegalStateException("Treasure map loot chest was not installed");
        }
        return (Container) world.getBlockAt(2, 161, 2).getState();
    }
    private void verifyTreasureMapLoot(CommandSender sender) {
        checkTreasureMapLimit(sender);
        World world = Bukkit.getWorld(TREASURE_KEY);
        for (String destination : List.of("blocked", "disabled", "found", "mixed")) {
            Inventory inventory = treasureMapChest(world, destination, "CHEST").getInventory();
            inspectTreasureMapChest(sender, destination);
            inventory.remove(Material.DIAMOND);
            Inventory reopened = ((Container) world.getBlockAt(2, 161, 2).getState()).getInventory();
            if (reopened.contains(Material.DIAMOND)
                    || !(reopened.contains(Material.FILLED_MAP) || reopened.contains(Material.MAP))) {
                throw new IllegalStateException("Reopening changed " + destination + " chest loot");
            }
        }
        sender.sendMessage("TREASURE_MAP_CHECK destinations=4 retained=true");
    }
    private void inspectTreasureMapChest(CommandSender sender, String destination) {
        requireTreasureDestination(destination);
        World world = Bukkit.getWorld(TREASURE_KEY);
        Inventory inventory = ((Container) world.getBlockAt(2, 161, 2).getState()).getInventory();
        ItemStack map = null;
        int diamonds = 0;
        for (ItemStack item : inventory.getContents()) {
            if (item == null) {
                continue;
            }
            if ((item.getType() == Material.MAP || item.getType() == Material.FILLED_MAP)
                    && item.getAmount() == 1 && map == null) {
                map = item;
            } else if (item.getType() == Material.DIAMOND) {
                diamonds += item.getAmount();
            } else {
                throw new IllegalStateException("Unexpected chest loot: " + item);
            }
        }
        if (map == null || diamonds != 1) {
            throw new IllegalStateException("Invalid " + destination + " chest: map=" + map + " diamonds=" + diamonds);
        }
        boolean expectedLocated = destination.equals("found") || destination.equals("mixed");
        MapView view = map.getItemMeta() instanceof MapMeta meta && meta.hasMapView() ? meta.getMapView() : null;
        if ((view != null) != expectedLocated) {
            throw new IllegalStateException("Unexpected map data for " + destination + ": " + map);
        }
        String result = "TREASURE_MAP_INSPECT destination=" + destination + " diamonds=1 located=" + expectedLocated;
        if (view != null) {
            StructureSearchResult target = world.locateNearestStructure(
                    new Location(world, 2, 161, 2), Structure.DESERT_PYRAMID, 50, false);
            if (target == null || target.getStructure() != Structure.DESERT_PYRAMID) {
                throw new IllegalStateException("Map has no verified pyramid target");
            }
            int targetX = target.getLocation().getBlockX();
            int targetZ = target.getLocation().getBlockZ();
            if (view.getWorld() != world || view.getScale() != MapView.Scale.CLOSEST
                    || view.getCenterX() != Math.floorDiv(targetX + 64, 128) * 128
                    || view.getCenterZ() != Math.floorDiv(targetZ + 64, 128) * 128) {
                throw new IllegalStateException("Map data does not cover the verified pyramid at " + target.getLocation());
            }
            result += " mapId=" + view.getId() + " targetX=" + targetX + " targetZ=" + targetZ
                    + " centerX=" + view.getCenterX() + " centerZ=" + view.getCenterZ();
        }
        sender.sendMessage(result);
    }
    private void requireTreasureDestination(String destination) {
        if (!List.of("blocked", "disabled", "found", "mixed").contains(destination)) {
            throw new IllegalArgumentException("Unknown treasure map destination: " + destination);
        }
    }
    private void lifecycleStatus(CommandSender sender) throws Exception {
        World world = Bukkit.getWorld(COMMAND_KEY);
        Path storage = WorldCreatorCompat.persistentLevelRoot(COMMAND_KEY).toPath();
@@ -282,11 +489,11 @@ public final class NativeLifecycleFixture extends JavaPlugin implements WorldRun
    }
    public boolean regionized() {
-        return false;
+        return J.isFolia();
    }
    public boolean primaryThread() {
-        return Bukkit.isPrimaryThread();
+        return J.isFolia() ? Bukkit.isGlobalTickThread() : Bukkit.isPrimaryThread();
    }
    public CompletableFuture<Void> runGlobal(Runnable task) {
@@ -299,10 +506,10 @@ public final class NativeLifecycleFixture extends JavaPlugin implements WorldRun
                result.completeExceptionally(failure);
            }
        };
-        if (Bukkit.isPrimaryThread()) {
+        if (primaryThread()) {
            wrapped.run();
-        } else {
+        } else if (!J.runGlobal(wrapped)) {
-            Bukkit.getScheduler().runTask(this, wrapped);
+            result.completeExceptionally(new IllegalStateException("Could not schedule fixture task"));
        }
        return result;
    }
@@ -0,0 +1,259 @@
 package art.arcane.iris.fixture;
 import art.arcane.iris.generation.runtime.Engine;
 import art.arcane.iris.platform.bukkit.BukkitBlockResolution;
 import art.arcane.iris.platform.generation.EngineBukkitOps;
 import art.arcane.iris.world.IrisToolbelt;
 import art.arcane.iris.world.loot.InventorySlotType;
 import art.arcane.iris.world.loot.IrisVanillaLootTable;
 import art.arcane.iris.world.loot.IrisLootTable;
 import art.arcane.volmlib.util.collection.KList;
 import art.arcane.volmlib.util.mantle.runtime.MantleChunk;
 import art.arcane.iris.world.task.J;
 import art.arcane.volmlib.util.matter.Matter;
 import io.papermc.paper.event.world.StructuresLocateEvent;
 import io.papermc.paper.event.server.ServerResourcesReloadedEvent;
 import io.papermc.paper.math.Position;
 import org.bukkit.Bukkit;
 import org.bukkit.Location;
 import org.bukkit.Material;
 import org.bukkit.NamespacedKey;
 import org.bukkit.World;
 import org.bukkit.block.Block;
 import org.bukkit.block.Container;
 import org.bukkit.block.Chest;
 import org.bukkit.command.CommandSender;
 import org.bukkit.event.EventHandler;
 import org.bukkit.event.Listener;
 import org.bukkit.event.world.LootGenerateEvent;
 import org.bukkit.generator.structure.Structure;
 import org.bukkit.inventory.ItemStack;
 import org.bukkit.inventory.Inventory;
 import org.bukkit.plugin.java.JavaPlugin;
 import org.bukkit.util.StructureSearchResult;
 import java.lang.reflect.InvocationTargetException;
 import java.lang.reflect.Proxy;
 import java.util.Collection;
 import java.util.List;
 import java.util.concurrent.atomic.AtomicInteger;
 public final class TreasureLootChecks implements Listener {
    private static final NamespacedKey WORLD_KEY = new NamespacedKey("iris", "treasure_map_probe");
    private static final List<String> CHESTS = List.of(
            "CHEST", "COPPER_CHEST", "EXPOSED_COPPER_CHEST", "WEATHERED_COPPER_CHEST",
            "OXIDIZED_COPPER_CHEST", "WAXED_COPPER_CHEST", "WAXED_EXPOSED_COPPER_CHEST",
            "WAXED_WEATHERED_COPPER_CHEST", "WAXED_OXIDIZED_COPPER_CHEST");
    private final IrisVanillaLootTable reloadTable = new IrisVanillaLootTable("iris_qa:reload");
    private final AtomicInteger resourceReloads = new AtomicInteger();
    private LocateAction locateAction = LocateAction.PASS;
    private int locateEvents;
    private int lootEvents;
    private boolean lootEventsOwned = true;
    public TreasureLootChecks(JavaPlugin plugin) {
        Bukkit.getPluginManager().registerEvents(this, plugin);
    }
    public void verify(CommandSender sender) {
        World world = requireWorld();
        verifyCopperLoot(world);
        sender.sendMessage("TREASURE_COPPER_LOOT variants=8 normal=true diamonds=1");
        verifyInventoryRollback(world);
        sender.sendMessage("TREASURE_LOOT_ROLLBACK contents=true nativeTable=true seed=true retry=true");
        verifyLocateEvents(world);
        sender.sendMessage("TREASURE_LOCATE_EVENTS cancelled=true replaced=true calls=2");
        sender.sendMessage("TREASURE_EXTRA_CHECK variants=9 rollback=true locateEvents=true");
    }
    public void verifyRegion(CommandSender sender) {
        World world = requireWorld();
        if (!J.isOwnedByCurrentRegion(world, 0, 0)) {
            throw new IllegalStateException("Fixture does not own its loot region");
        }
        lootEvents = 0;
        lootEventsOwned = true;
        verifyCopperLoot(world);
        if (lootEvents != CHESTS.size() || !lootEventsOwned) {
            throw new IllegalStateException("Loot event ownership failed: count=" + lootEvents
                    + " owned=" + lootEventsOwned);
        }
        sender.sendMessage("TREASURE_REGION_LOOT copper=8 normal=1 events=" + lootEvents
                + " owned=true folia=" + J.isFolia());
    }
    @EventHandler
    public void onLoot(LootGenerateEvent event) {
        if (event.getWorld().getKey().equals(WORLD_KEY) && event.isPlugin()) {
            Location origin = event.getLootContext().getLocation();
            lootEvents++;
            lootEventsOwned &= J.isOwnedByCurrentRegion(event.getWorld(),
                    origin.getBlockX() >> 4, origin.getBlockZ() >> 4);
        }
    }
    public void verifyReload(CommandSender sender, boolean reloaded) {
        World world = requireWorld();
        Material expected = reloaded ? Material.EMERALD : Material.DIAMOND;
        Collection<ItemStack> items = reloadTable.getLoot(
                false, 783L, InventorySlotType.STORAGE, world, 2, 161, 2);
        if (items.size() != 1 || items.iterator().next().getType() != expected) {
            throw new IllegalStateException("Reloaded loot did not contain " + expected + ": " + items);
        }
        sender.sendMessage("TREASURE_RELOAD material=" + expected);
    }
    public void reportResourceReloads(CommandSender sender) {
        sender.sendMessage("TREASURE_RESOURCES revision=" + resourceReloads.get());
    }
    @EventHandler
    public void onResourcesReloaded(ServerResourcesReloadedEvent event) {
        resourceReloads.incrementAndGet();
    }
    @EventHandler
    public void onLocate(StructuresLocateEvent event) {
        if (!event.getWorld().getKey().equals(WORLD_KEY) || locateAction == LocateAction.PASS) {
            return;
        }
        locateEvents++;
        if (locateAction == LocateAction.CANCEL) {
            event.setCancelled(true);
        } else {
            event.setResult(new StructuresLocateEvent.Result(Position.block(123, 100, 456), Structure.DESERT_PYRAMID));
        }
    }
    private void verifyCopperLoot(World world) {
        Engine engine = IrisToolbelt.access(world).getEngine();
        Block block = world.getBlockAt(4, 161, 4);
        MantleChunk<Matter> mantle = engine.getMantle().getMantle().useChunk(block.getChunk());
        try {
            for (String name : CHESTS) {
                block.setType(Material.AIR, false);
                block.setType(Material.valueOf(name), false);
                if (!BukkitBlockResolution.isStorageChest(block.getBlockData())) {
                    throw new IllegalStateException("Chest is excluded from Iris loot: " + name);
                }
                EngineBukkitOps.update(engine, 4, 161, 4, block.getChunk(), mantle);
                Container chest = (Container) block.getState();
                int diamonds = 0;
                for (ItemStack item : chest.getInventory().getContents()) {
                    if (item == null) {
                        continue;
                    }
                    if (item.getType() != Material.DIAMOND) {
                        throw new IllegalStateException("Unexpected " + name + " loot: " + item);
                    }
                    diamonds += item.getAmount();
                }
                if (diamonds != 1) {
                    throw new IllegalStateException(name + " contains " + diamonds + " diamonds");
                }
            }
        } finally {
            mantle.release();
        }
    }
    private void verifyInventoryRollback(World world) {
        Engine engine = IrisToolbelt.access(world).getEngine();
        Block block = world.getBlockAt(6, 161, 4);
        block.setType(Material.AIR, false);
        block.setType(Material.CHEST, false);
        Chest chest = (Chest) block.getState();
        chest.getBlockInventory().setItem(0, new ItemStack(Material.EMERALD, 3));
        chest = (Chest) block.getState();
        NamespacedKey key = new NamespacedKey("iris_qa", "reload");
        chest.setLootTable(Bukkit.getLootTable(key));
        chest.setSeed(913L);
        if (!chest.update(true, false)) {
            throw new IllegalStateException("Could not set native loot for rollback check");
        }
        Inventory inventory = chest.getBlockInventory();
        IllegalStateException injected = new IllegalStateException("Fixture insertion interruption");
        Inventory interrupted = (Inventory) Proxy.newProxyInstance(Inventory.class.getClassLoader(),
                new Class<?>[]{Inventory.class}, (proxy, method, arguments) -> {
                    Object result;
                    try {
                        result = method.invoke(inventory, arguments);
                    } catch (InvocationTargetException failure) {
                        throw failure.getCause();
                    }
                    if (method.getName().equals("addItem")) {
                        throw injected;
                    }
                    return result;
                });
        KList<IrisLootTable> tables = new KList<>();
        tables.add(new IrisVanillaLootTable("iris_qa:reload"));
        try {
            EngineBukkitOps.addItems(engine, false, interrupted, tables, InventorySlotType.STORAGE,
                    world, 6, 161, 4);
            throw new IllegalStateException("Interrupted insertion did not fail");
        } catch (IllegalStateException failure) {
            if (failure != injected) {
                throw failure;
            }
        }
        Chest restored = (Chest) block.getState();
        if (restored.getLootTable() == null || !restored.getLootTable().getKey().equals(key)
                || restored.getSeed() != 913L) {
            throw new IllegalStateException("Rollback lost the native loot table or seed");
        }
        ItemStack existing = restored.getSnapshotInventory().getItem(0);
        if (existing == null || existing.getType() != Material.EMERALD || existing.getAmount() != 3) {
            throw new IllegalStateException("Rollback lost the original contents: " + existing);
        }
        EngineBukkitOps.addItems(engine, false, restored.getBlockInventory(), tables, InventorySlotType.STORAGE,
                world, 6, 161, 4);
        int diamonds = 0;
        int emeralds = 0;
        for (ItemStack item : restored.getBlockInventory().getContents()) {
            if (item == null) {
                continue;
            }
            if (item.getType() == Material.DIAMOND) {
                diamonds += item.getAmount();
            } else if (item.getType() == Material.EMERALD) {
                emeralds += item.getAmount();
            }
        }
        if (diamonds != 2 || emeralds != 3 || ((Chest) block.getState()).getLootTable() != null) {
            throw new IllegalStateException("Loot retry failed: diamonds=" + diamonds + " emeralds=" + emeralds);
        }
    }
    private void verifyLocateEvents(World world) {
        Location origin = new Location(world, 2, 161, 2);
        locateEvents = 0;
        try {
            locateAction = LocateAction.CANCEL;
            if (world.locateNearestStructure(origin, Structure.DESERT_PYRAMID, 50, false) != null) {
                throw new IllegalStateException("Cancelled structure search returned a target");
            }
            locateAction = LocateAction.REPLACE;
            StructureSearchResult result = world.locateNearestStructure(origin, Structure.DESERT_PYRAMID, 50, false);
            if (result == null || result.getStructure() != Structure.DESERT_PYRAMID
                    || result.getLocation().getBlockX() != 123 || result.getLocation().getBlockY() != 100
                    || result.getLocation().getBlockZ() != 456 || locateEvents != 2) {
                throw new IllegalStateException("Structure search ignored event result: " + result);
            }
        } finally {
            locateAction = LocateAction.PASS;
        }
    }
    private World requireWorld() {
        World world = Bukkit.getWorld(WORLD_KEY);
        if (world == null || !IrisToolbelt.isIrisWorld(world)) {
            throw new IllegalStateException("Treasure map fixture world is absent");
        }
        return world;
    }
    private enum LocateAction {
        PASS, CANCEL, REPLACE
    }
 }
@@ -0,0 +1,61 @@
 import { readFile } from 'node:fs/promises'
 import path from 'node:path'
 const world = 'native-terrain-support'
 const air = new Set(['air', 'cave_air', 'void_air'])
 export default {
  name: 'iris-native-terrain-support',
  description: 'Verify native terrain fitting preserves buried caves and excludes trees from lowered ground.',
  async run(context) {
    const bot = context.bot
    const source = await readFile(path.join(context.server.directory, '.server-source'), 'utf8')
    context.expect(/^isolated=true\s*$/m.test(source), 'Requires an isolated instance')
    const position = bot.entity.position.clone()
    const at = (x, y, z) => bot.blockAt(position.clone().set(x, y, z))
    const teleport = async (x, y, z) => {
      await context.command(`/minecraft:tp @s ${x + 0.5} ${y} ${z + 0.5}`, /Teleported/i, 60000)
      await context.waitUntil(() => Math.abs(bot.entity.position.x - x - 0.5) < 1
        && Math.abs(bot.entity.position.z - z - 0.5) < 1 && at(x, y, z),
      { label: 'Coordinate chunk received', timeoutMs: 90000, intervalMs: 100 })
    }
    await context.step('enter the seeded overworld', async () => {
      if (context.options.command !== 'reuse') {
        await context.command(`/iris create name=${world} type=overworld seed=1337`,
          /Successfully created your world/i, 240000)
      }
      await context.command(`/iris tp ${world}`)
      await context.waitUntil(async () => {
        const snapshot = await context.observe()
        const player = snapshot.players.find(entry => entry.username === bot.username)
        return snapshot.worlds.some(entry => entry.id === player?.world && entry.name.endsWith(world))
      }, { label: 'Entered seeded overworld', timeoutMs: 90000, intervalMs: 100 })
      await context.command('/minecraft:gamemode spectator @s', /Spectator Mode/i)
      await context.command('/minecraft:seed', /Seed:.*1337/)
    })
    await context.step('preserve caves beneath the ruined portal terrain skirt', async () => {
      await teleport(995, 44, -3611)
      await context.waitUntil(() => at(990, 43, -3626) && at(992, 43, -3627),
        { label: 'Cave columns received', timeoutMs: 90000, intervalMs: 100 })
      for (const [x, z, bottom, top] of [[990, -3626, 33, 54], [992, -3627, 34, 55]]) {
        for (let y = bottom; y <= top; y++) {
          const block = at(x, y, z)
          context.expect(block && air.has(block.name), 'Native terrain fitting filled a buried cave',
            { x, y, z, material: block?.name })
        }
        await context.command(`/execute if block ${x} 43 ${z} minecraft:cave_air run say CAVE_PRESERVED_${x}`,
          new RegExp(`CAVE_PRESERVED_${x}`))
      }
    })
    await context.step('exclude the pine whose support is removed by village grading', async () => {
      await teleport(-2601, 174, -7063)
      await context.waitUntil(() => at(-2601, 167, -7063),
        { label: 'Pine column received', timeoutMs: 90000, intervalMs: 100 })
      const block = at(-2601, 167, -7063)
      context.expect(air.has(block.name), 'Tree remains above terrain removed by native grading',
        { x: -2601, y: 167, z: -7063, material: block.name })
      await context.command('/execute if block -2601 167 -7063 minecraft:air run say PINE_EXCLUDED',
        /PINE_EXCLUDED/)
    })
  }
 }
@@ -0,0 +1,20 @@
 {
  "name": "Flat",
  "derivative": "minecraft:plains",
  "vanillaDerivative": "minecraft:plains",
  "layers": [
    {"minHeight": 1, "maxHeight": 1, "palette": [{"block": "minecraft:lime_wool"}]},
    {"minHeight": 128, "maxHeight": 128, "palette": [{"block": "minecraft:stone"}]}
  ],
  "generators": [{"generator": "flat", "min": 32, "max": 32}],
  "objects": [{
    "place": ["smolshroom1"],
    "chance": 1,
    "density": 8,
    "mode": "ORGANIC_STILT",
    "rotation": {"enabled": false},
    "scale": {"size": 0.75, "interpolation": "NONE"},
    "translate": {"y": 6},
    "stiltSettings": {"organicMaxScan": 8, "organicJitter": 0, "organicScratch": 0}
  }]
 }
@@ -0,0 +1,15 @@
 {
  "name": "Object Scaling Fixture",
  "version": 1,
  "mode": {"type": "OVERWORLD"},
  "regions": ["flat"],
  "focusRegion": "flat",
  "focus": "flat",
  "landChance": 1,
  "environment": "NORMAL",
  "dimensionHeight": {"min": 0, "max": 128},
  "logicalHeight": 128,
  "fluidHeight": 0,
  "bedrock": false,
  "caveProfile": {"enabled": false}
 }
@@ -0,0 +1,5 @@
 {
  "seed": 310,
  "interpolator": {"function": "NONE", "horizontalScale": 1},
  "composite": [{"seed": 310, "style": {"style": "FLAT"}}]
 }
@@ -0,0 +1,6 @@
 {
  "name": "Flat",
  "landBiomes": ["flat"],
  "seaBiomes": ["flat"],
  "shoreBiomes": ["flat"]
 }
@@ -0,0 +1,105 @@
 import { createHash } from 'node:crypto'
 import { readFile, realpath } from 'node:fs/promises'
 import path from 'node:path'
 export default {
  name: 'iris-object-scaling',
  description: 'Verify fractional mushroom scaling retains its cap and uses its stem for organic supports.',
  async run(context) {
    const directory = await realpath(context.server.directory)
    const source = await readFile(path.join(directory, '.server-source'), 'utf8')
    context.expect(/^isolated=true\s*$/m.test(source), 'Object scaling requires an isolated instance')
    const pack = await realpath(path.join(directory, 'plugins', 'Iris', 'packs', 'object-scaling-fixture'))
    context.expect(pack.startsWith(`${directory}${path.sep}`), 'Object scaling requires a local fixture pack')
    const object = await readFile(path.join(pack, 'objects', 'smolshroom1.iob'))
    const objectHash = createHash('sha256').update(object).digest('hex')
    const biome = JSON.parse(await readFile(path.join(pack, 'biomes', 'flat.json'), 'utf8'))
    const surfaceY = biome.generators[0].min
    const originalStemY = surfaceY + biome.objects[0].translate.y
    const expectedCapY = originalStemY + 1
    const maximumExtension = biome.objects[0].stiltSettings.organicMaxScan
    context.expect(surfaceY === 32 && expectedCapY === 39 && maximumExtension === 8,
      'Expected the bounded organic support fixture', { surfaceY, expectedCapY, maximumExtension })
    const world = context.options.command ?? 'object_scaling_probe'
    context.expect(/^[a-z0-9_]+$/.test(world), 'Fixture world name must be a simple identifier')
    await context.step('create the fractional mushroom fixture world', async () => {
      const response = await context.command(`/iris create name=${world} type=object-scaling-fixture seed=1337`,
        /Successfully created your world|World ready|Failed to create|Exception raised/i, 180000)
      context.expect(/Successfully created your world|World ready/i.test(response), response)
      await context.command(`/iris tp ${world}`)
      await context.waitUntil(async () => {
        const observation = await context.observe()
        const player = observation.players.find(entry => entry.username === context.bot.username)
        const current = observation.worlds.find(entry => entry.id === player?.world)
        return current?.key === `iris:${world}` || current?.name.endsWith(world)
      }, { label: 'Enter the scaling fixture world', timeoutMs: 60000, intervalMs: 100 })
      await context.command('/minecraft:gamemode spectator @s')
      await context.waitUntil(() => context.bot.game.gameMode === 'spectator',
        { label: 'Spectator mode', timeoutMs: 30000, intervalMs: 100 })
      await context.command('/minecraft:tp @s 0.5 48 0.5', /Teleported/i, 30000)
    })
    const columns = []
    await context.step('client sees one cap and continuous stem supports', async () => {
      const position = context.bot.entity.position.clone()
      await context.waitUntil(() => {
        if (Math.abs(context.bot.entity.position.x - 0.5) > 1
          || Math.abs(context.bot.entity.position.z - 0.5) > 1) return false
        for (const x of [-16, 0, 16, 31]) {
          for (const z of [-16, 0, 16, 31]) {
            for (const y of [0, 32, 63]) {
              if (!context.bot.blockAt(position.set(x, y, z))) return false
            }
          }
        }
        return true
      }, { label: 'Complete mushroom fixture chunks', timeoutMs: 60000, intervalMs: 100 })
      for (let x = -16; x < 32; x++) {
        for (let z = -16; z < 32; z++) {
          const caps = []
          const stems = []
          for (let y = 1; y < 63; y++) {
            const block = context.bot.blockAt(position.set(x, y, z))
            context.expect(block !== null, 'Every sampled mushroom block must be loaded', { x, y, z })
            if (block.name === 'red_mushroom_block') caps.push(y)
            if (block.name === 'mushroom_stem') stems.push(y)
          }
          if (caps.length === 0) continue
          context.expect(caps.length === 1, 'Mushroom cap was copied into its stem or support', { x, z, caps })
          const capY = caps[0]
          context.expect(capY === expectedCapY, 'Fractional scaling changed the expected mushroom height',
            { x, z, capY, expectedCapY })
          const bottomY = stems[0]
          const stemBlocks = stems.length
          context.expect(bottomY >= originalStemY - maximumExtension && bottomY <= surfaceY + 1,
            'Mushroom support must reach the surface within its configured extension limit',
            { x, z, capY, bottomY, surfaceY, maximumExtension, stems })
          context.expect(stemBlocks === capY - bottomY
            && stems.every((y, index) => y === bottomY + index),
          'Scaled mushroom must have a continuous stem from its cap to the ground', { x, z, capY, stems })
          const supportY = bottomY - 1
          const support = context.bot.blockAt(position.set(x, supportY, z))?.name
          const above = context.bot.blockAt(position.set(x, capY + 1, z))?.name
          context.expect(support === (supportY === surfaceY ? 'lime_wool' : 'stone'),
            'Mushroom stem must terminate on the fixture terrain', { x, z, capY, supportY, support })
          context.expect(above === 'air', 'Scaled mushroom has unexpected blocks above its cap', { x, z, capY, above })
          columns.push({ x, z, surfaceY, capY, bottomY, stemBlocks,
            buriedStemBlocks: Math.max(0, surfaceY - bottomY + 1) })
        }
      }
      context.expect(columns.length >= 8, 'Expected at least eight scaled mushroom columns', { columns })
    })
    await context.step('server confirms the sampled stem and cap materials', async () => {
      for (const [index, column] of columns.slice(0, 8).entries()) {
        const { x, z, surfaceY, capY, bottomY } = column
        const marker = `IRIS_SCALING_OK_${index}`
        await context.command(`/minecraft:execute if block ${x} ${surfaceY + 1} ${z} minecraft:mushroom_stem`
          + ` if block ${x} ${bottomY} ${z} minecraft:mushroom_stem`
          + ` if block ${x} ${capY} ${z} minecraft:red_mushroom_block run minecraft:say ${marker}`,
        new RegExp(marker), 10000)
      }
    })
    context.report.objectScaling = { world, scale: 0.75, object: 'smolshroom1', objectHash,
      surfaceY, maximumExtension, checkedColumns: columns.length,
      serverConfirmedColumns: Math.min(8, columns.length), columns }
  }
 }
@@ -0,0 +1,82 @@
 import { createHash } from 'node:crypto'
 import { readFile, writeFile } from 'node:fs/promises'
 import path from 'node:path'
 const worlds = [
  { name: 'seed-selection-default', seed: '1337', argument: '' },
  { name: 'seed-selection-positive', seed: '78264193', argument: ' seed=78264193' },
  { name: 'seed-selection-negative', seed: '-734829104958217364', argument: ' seed=-734829104958217364' },
  { name: 'seed-selection-zero', seed: '0', argument: ' seed=0' }
 ]
 export default {
  name: 'iris-seed-selection',
  description: 'Verify omitted, positive, negative, and zero creation seeds against visible terrain and a cold restart.',
  async run(context) {
    const source = await readFile(path.join(context.server.directory, '.server-source'), 'utf8')
    context.expect(/^isolated=true\s*$/m.test(source), 'Seed selection requires an isolated instance')
    const wait = (predicate, label) => context.waitUntil(predicate, { label, timeoutMs: 60000, intervalMs: 100 })
    const restart = context.options.command === 'restart-check'
    const stateFile = path.join(context.server.directory, '.seed-selection.json')
    const saved = restart ? JSON.parse(await readFile(stateFile, 'utf8')) : undefined
    const jarHash = createHash('sha256').update(await readFile(path.join(context.server.directory, 'plugins', 'Iris.jar'))).digest('hex')
    const processId = (await context.observe()).processId
    if (restart) {
      context.expect(saved.processId !== processId, 'Restart-check requires a cold server restart')
      context.expect(saved.jarHash === jarHash, 'Restart-check requires the same Iris jar')
    }
    const outputs = {}
    for (const world of worlds) {
      await context.step(`${restart ? 'Reload' : 'Create'} ${world.name} with seed ${world.seed}`, async () => {
        if (!restart) {
          await context.command(`/iris create name=${world.name} type=cohesion${world.argument}`,
            /Successfully created your world/i, 180000)
        }
        await context.command(`/iris tp ${world.name}`)
        await wait(async () => {
          const observation = await context.observe()
          const player = observation.players.find(entry => entry.username === context.bot.username)
          const current = observation.worlds.find(entry => entry.id === player?.world)
          return current?.key === `iris:${world.name}` || current?.name.endsWith(world.name)
        }, `Enter ${world.name}`)
        await context.command('/minecraft:gamemode spectator @s')
        await wait(() => context.bot.game.gameMode === 'spectator', 'Spectator mode')
        await context.command('/minecraft:seed', new RegExp(`Seed:\\s*\\[?${world.seed}\\]?(?:\\s|$)`))
        const x = 1024
        const z = -1024
        await context.command(`/minecraft:tp @s ${x + 8.5} 48 ${z + 8.5}`, /Teleported/i, 30000)
        await wait(() => Math.abs(context.bot.entity.position.x - x - 8.5) < 1
          && Math.abs(context.bot.entity.position.z - z - 8.5) < 1, 'Sample teleport')
        const position = context.bot.entity.position.clone()
        await wait(() => context.bot.blockAt(position.clone().set(x, 0, z))
          && context.bot.blockAt(position.clone().set(x + 15, 63, z + 15)), 'Complete sample chunk')
        const digest = createHash('sha256')
        let stone = 0
        for (let dx = 0; dx < 16; dx++) {
          for (let dz = 0; dz < 16; dz++) {
            for (let y = 0; y < 64; y++) {
              const block = context.bot.blockAt(position.set(x + dx, y, z + dz))
              context.expect(block !== null, 'Missing sampled block', { x: x + dx, y, z: z + dz })
              digest.update(`${block.stateId},`)
              if (block.name === 'stone') stone++
            }
          }
        }
        context.expect(stone > 1000, 'Fixture terrain was not generated', { world: world.name, stone })
        const blocks = digest.digest('hex')
        outputs[world.name] = { seed: world.seed, blocks }
        if (restart) {
          context.expect(saved.worlds[world.name].seed === world.seed, 'Seed expectation changed after restart')
          context.expect(saved.worlds[world.name].blocks === blocks, 'Persisted terrain changed after restart',
            { world: world.name, before: saved.worlds[world.name].blocks, after: blocks })
        }
      })
    }
    const signatures = new Set(Object.values(outputs).map(output => output.blocks))
    context.expect(signatures.size === worlds.length, 'Different requested seeds generated identical sample chunks', outputs)
    context.report.seedSelection = { restart, jarHash, worlds: outputs }
    if (!restart) {
      await writeFile(stateFile, JSON.stringify({ processId, jarHash, worlds: outputs }))
    }
  }
 }
@@ -0,0 +1,33 @@
 {
  "type": "minecraft:chest",
  "pools": [
    {
      "rolls": 1,
      "entries": [
        {
          "type": "minecraft:item",
          "name": "minecraft:map",
          "functions": [
            {
              "destination": "iris_qa:blocked",
              "decoration": "minecraft:red_x",
              "zoom": 0,
              "search_radius": 50,
              "skip_existing_chunks": false,
              "function": "minecraft:exploration_map"
            }
          ]
        }
      ]
    },
    {
      "rolls": 1,
      "entries": [
        {
          "type": "minecraft:item",
          "name": "minecraft:diamond"
        }
      ]
    }
  ]
 }
@@ -0,0 +1,33 @@
 {
  "type": "minecraft:chest",
  "pools": [
    {
      "rolls": 1,
      "entries": [
        {
          "type": "minecraft:item",
          "name": "minecraft:map",
          "functions": [
            {
              "destination": "iris_qa:disabled",
              "decoration": "minecraft:red_x",
              "zoom": 0,
              "search_radius": 50,
              "skip_existing_chunks": false,
              "function": "minecraft:exploration_map"
            }
          ]
        }
      ]
    },
    {
      "rolls": 1,
      "entries": [
        {
          "type": "minecraft:item",
          "name": "minecraft:diamond"
        }
      ]
    }
  ]
 }
@@ -0,0 +1,33 @@
 {
  "type": "minecraft:chest",
  "pools": [
    {
      "rolls": 1,
      "entries": [
        {
          "type": "minecraft:item",
          "name": "minecraft:map",
          "functions": [
            {
              "destination": "iris_qa:found",
              "decoration": "minecraft:red_x",
              "zoom": 0,
              "search_radius": 50,
              "skip_existing_chunks": false,
              "function": "minecraft:exploration_map"
            }
          ]
        }
      ]
    },
    {
      "rolls": 1,
      "entries": [
        {
          "type": "minecraft:item",
          "name": "minecraft:diamond"
        }
      ]
    }
  ]
 }
@@ -0,0 +1,33 @@
 {
  "type": "minecraft:chest",
  "pools": [
    {
      "rolls": 1,
      "entries": [
        {
          "type": "minecraft:item",
          "name": "minecraft:map",
          "functions": [
            {
              "destination": "iris_qa:mixed",
              "decoration": "minecraft:red_x",
              "zoom": 0,
              "search_radius": 50,
              "skip_existing_chunks": false,
              "function": "minecraft:exploration_map"
            }
          ]
        }
      ]
    },
    {
      "rolls": 1,
      "entries": [
        {
          "type": "minecraft:item",
          "name": "minecraft:diamond"
        }
      ]
    }
  ]
 }
@@ -0,0 +1,14 @@
 {
  "type": "minecraft:chest",
  "pools": [
    {
      "rolls": 1,
      "entries": [
        {
          "type": "minecraft:item",
          "name": "minecraft:diamond"
        }
      ]
    }
  ]
 }
@@ -0,0 +1,5 @@
 {
  "values": [
    "minecraft:buried_treasure"
  ]
 }
@@ -0,0 +1,5 @@
 {
  "values": [
    "minecraft:mansion"
  ]
 }
@@ -0,0 +1,5 @@
 {
  "values": [
    "minecraft:desert_pyramid"
  ]
 }
@@ -0,0 +1,6 @@
 {
  "values": [
    "minecraft:buried_treasure",
    "minecraft:desert_pyramid"
  ]
 }
@@ -0,0 +1,13 @@
 {
  "pack": {
    "description": "Treasure map gameplay fixtures",
    "min_format": [
      107,
      1
    ],
    "max_format": [
      107,
      1
    ]
  }
 }
@@ -0,0 +1,31 @@
 {
  "type": "minecraft:chest",
  "pools": [
    {
      "rolls": 1,
      "entries": [
        {
          "type": "minecraft:item",
          "name": "minecraft:filled_map",
          "modifier": {
            "destination": "#iris_qa:blocked",
            "decoration": "minecraft:red_x",
            "zoom": 0,
            "search_radius": 50,
            "skip_existing_chunks": false,
            "type": "minecraft:exploration_map"
          }
        }
      ]
    },
    {
      "rolls": 1,
      "entries": [
        {
          "type": "minecraft:item",
          "name": "minecraft:diamond"
        }
      ]
    }
  ]
 }
@@ -0,0 +1,31 @@
 {
  "type": "minecraft:chest",
  "pools": [
    {
      "rolls": 1,
      "entries": [
        {
          "type": "minecraft:item",
          "name": "minecraft:filled_map",
          "modifier": {
            "destination": "#iris_qa:disabled",
            "decoration": "minecraft:red_x",
            "zoom": 0,
            "search_radius": 50,
            "skip_existing_chunks": false,
            "type": "minecraft:exploration_map"
          }
        }
      ]
    },
    {
      "rolls": 1,
      "entries": [
        {
          "type": "minecraft:item",
          "name": "minecraft:diamond"
        }
      ]
    }
  ]
 }
@@ -0,0 +1,31 @@
 {
  "type": "minecraft:chest",
  "pools": [
    {
      "rolls": 1,
      "entries": [
        {
          "type": "minecraft:item",
          "name": "minecraft:filled_map",
          "modifier": {
            "destination": "#iris_qa:found",
            "decoration": "minecraft:red_x",
            "zoom": 0,
            "search_radius": 50,
            "skip_existing_chunks": false,
            "type": "minecraft:exploration_map"
          }
        }
      ]
    },
    {
      "rolls": 1,
      "entries": [
        {
          "type": "minecraft:item",
          "name": "minecraft:diamond"
        }
      ]
    }
  ]
 }
@@ -0,0 +1,31 @@
 {
  "type": "minecraft:chest",
  "pools": [
    {
      "rolls": 1,
      "entries": [
        {
          "type": "minecraft:item",
          "name": "minecraft:filled_map",
          "modifier": {
            "destination": "#iris_qa:mixed",
            "decoration": "minecraft:red_x",
            "zoom": 0,
            "search_radius": 50,
            "skip_existing_chunks": false,
            "type": "minecraft:exploration_map"
          }
        }
      ]
    },
    {
      "rolls": 1,
      "entries": [
        {
          "type": "minecraft:item",
          "name": "minecraft:diamond"
        }
      ]
    }
  ]
 }
@@ -0,0 +1,14 @@
 {
  "type": "minecraft:chest",
  "pools": [
    {
      "rolls": 1,
      "entries": [
        {
          "type": "minecraft:item",
          "name": "minecraft:diamond"
        }
      ]
    }
  ]
 }
@@ -0,0 +1,5 @@
 {
  "values": [
    "minecraft:buried_treasure"
  ]
 }
@@ -0,0 +1,5 @@
 {
  "values": [
    "minecraft:mansion"
  ]
 }
@@ -0,0 +1,5 @@
 {
  "values": [
    "minecraft:desert_pyramid"
  ]
 }
@@ -0,0 +1,6 @@
 {
  "values": [
    "minecraft:buried_treasure",
    "minecraft:desert_pyramid"
  ]
 }
@@ -0,0 +1,13 @@
 {
  "pack": {
    "description": "Treasure map gameplay fixtures",
    "min_format": [
      121,
      0
    ],
    "max_format": [
      121,
      0
    ]
  }
 }
@@ -0,0 +1,32 @@
 {
  "name": "Flat",
  "derivative": "minecraft:plains",
  "vanillaDerivative": "minecraft:plains",
  "layers": [
    {
      "minHeight": 1,
      "maxHeight": 1,
      "palette": [
        {
          "block": "minecraft:lime_wool"
        }
      ]
    },
    {
      "minHeight": 384,
      "maxHeight": 384,
      "palette": [
        {
          "block": "minecraft:green_concrete"
        }
      ]
    }
  ],
  "generators": [
    {
      "generator": "flat",
      "min": 96,
      "max": 96
    }
  ]
 }
@@ -0,0 +1,64 @@
 {
  "name": "Treasure Map Fixture",
  "version": 1,
  "mode": {
    "type": "OVERWORLD"
  },
  "regions": [
    "flat"
  ],
  "focusRegion": "flat",
  "focus": "flat",
  "landChance": 1,
  "environment": "NORMAL",
  "dimensionHeight": {
    "min": -64,
    "max": 320
  },
  "logicalHeight": 384,
  "fluidHeight": 0,
  "bedrock": false,
  "rockPalette": {
    "palette": [
      {
        "block": "minecraft:red_concrete"
      }
    ]
  },
  "importedStructures": {
    "disabled": [
      "minecraft:"
    ]
  },
  "structures": [
    {
      "placementId": "blocked-treasure",
      "nativeStructures": [
        {
          "structure": "minecraft:buried_treasure"
        }
      ],
      "distribution": "RANDOM_SPREAD",
      "spacing": 1,
      "separation": 0,
      "minHeight": 0,
      "maxHeight": 0
    },
    {
      "placementId": "reachable-pyramid",
      "nativeStructures": [
        {
          "structure": "minecraft:desert_pyramid"
        }
      ],
      "distribution": "RANDOM_SPREAD",
      "spacing": 16,
      "separation": 4
    }
  ],
  "loot": {
    "tables": [
      "fixture-diamond"
    ]
  }
 }
@@ -0,0 +1,15 @@
 {
  "interpolator": {
    "function": "NONE",
    "horizontalScale": 1
  },
  "seed": 310,
  "composite": [
    {
      "seed": 310,
      "style": {
        "style": "FLAT"
      }
    }
  ]
 }
@@ -0,0 +1,15 @@
 {
  "name": "Fixture Diamond",
  "rarity": 1,
  "minPicked": 1,
  "maxPicked": 1,
  "maxTries": 1,
  "loot": [
    {
      "type": "diamond",
      "rarity": 1,
      "minAmount": 1,
      "maxAmount": 1
    }
  ]
 }
@@ -0,0 +1,12 @@
 {
  "name": "Flat",
  "landBiomes": [
    "flat"
  ],
  "seaBiomes": [
    "flat"
  ],
  "shoreBiomes": [
    "flat"
  ]
 }
@@ -0,0 +1,211 @@
 import { readFile, writeFile } from 'node:fs/promises'
 import path from 'node:path'
 const simplifyNbt = value => {
  if (Array.isArray(value)) return value.map(simplifyNbt)
  if (value === null || typeof value !== 'object') return value
  if ('type' in value && 'value' in value) return simplifyNbt(value.value)
  return Object.fromEntries(Object.entries(value).map(([key, entry]) => [key, simplifyNbt(entry)]))
 }
 const completeClientTicks = context => {
  const client = context.bot._client
  context.expect(context.bot.supportFeature('sendsClientTickEndPacket'), 'Fixture client supports tick delimiters')
  let tickTimer
  const finishTick = () => {
    clearTimeout(tickTimer)
    client.write('tick_end', {})
    tickTimer = setTimeout(finishTick, 50)
  }
  context.bot.on('move', finishTick)
  finishTick()
  context.signal.addEventListener('abort', () => {
    clearTimeout(tickTimer)
    context.bot.removeListener('move', finishTick)
  }, { once: true })
 }
 export default {
  name: 'iris-treasure-maps',
  description: 'Verify exploration-map targets, bounded misses, retained loot, and normal/copper storage on Iris.',
  async run(context) {
    completeClientTicks(context)
    context.bot.physicsEnabled = false
    context.bot.clearControlStates()
    context.bot.entity.velocity.set(0, 0, 0)
    const source = await readFile(path.join(context.server.directory, '.server-source'), 'utf8')
    context.expect(/^isolated=true\s*$/m.test(source), 'Treasure map fixtures require an isolated instance')
    const command = async (operation, expected, timeoutMs = 30000) => {
      const token = expected.split(' ')[0]
      const response = await context.command(`/irislifecycle ${operation}`,
        new RegExp(`${token}|NATIVE_FAILED|TREASURE_.*_FAILED`), timeoutMs)
      context.expect(response.includes(expected), response)
      return response
    }
    const bounded = (label, action) => context.waitUntil(async () => {
      await action()
      return true
    }, { label, timeoutMs: 10000 })
    let lastActivation = 0
    const openChest = async material => {
      const position = context.bot.entity.position.clone().set(2, 161, 2)
      await context.waitUntil(() => context.bot.blockAt(position)?.name === material, {
        label: `${material} reached the client`, timeoutMs: 10000
      })
      const delay = 150 - (performance.now() - lastActivation)
      if (delay > 0) await context.sleep(delay)
      const opened = context.waitForEvent('windowOpen', undefined, 30000)
      await bounded(`Activate ${material}`, () => context.bot.activateBlock(context.bot.blockAt(position)))
      lastActivation = performance.now()
      const [window] = await opened
      return window
    }
    const chestItems = window => window.slots.slice(0, window.inventoryStart).filter(Boolean)
    const mapId = item => item.componentMap?.get('map_id')?.data
    let missItem
    await context.step('create and enter the Iris treasure map world', async () => {
      const response = await command('treasure-map-create', 'TREASURE_MAP_READY world=iris:treasure_map_probe', 180000)
      const version = response.match(/version=(\S+)/)?.[1]
      context.expect(/^26\.[23](?:[.-]|$)/.test(version ?? ''), 'Fixture requires its matching 26.2 or 26.3 data pack', { version })
      missItem = version.startsWith('26.2') ? 'map' : 'filled_map'
      context.report.treasurePlatform = { version, folia: response.includes('folia=true'), missItem }
      await context.waitUntil(() => context.bot.entity.position.distanceTo(
        context.bot.entity.position.clone().set(0.5, 161, 0.5)
      ) < 2, { label: 'Fixture teleport reached the client', timeoutMs: 30000 })
    })
    await context.step('confirm the missing target exhausts the placement search budget', async () => {
      await command('treasure-map-limit', 'TREASURE_MAP_LIMIT status=SEARCH_LIMIT_REACHED', 120000)
    })
    for (const material of ['chest', 'copper_chest']) {
      for (const destination of ['blocked', 'disabled', 'found', 'mixed']) {
        await context.step(`open ${material} with ${destination} map target and retain all loot`, async () => {
          const evidence = { destination, material, phase: 'prepare' }
          context.report.treasureMaps ??= []
          context.report.treasureMaps.push(evidence)
          const located = destination === 'found' || destination === 'mixed'
          const mapName = located ? 'filled_map' : missItem
          await command(`treasure-map-chest ${destination} ${material.toUpperCase()}`,
            `TREASURE_MAP_CHEST destination=${destination} material=${material.toUpperCase()}`)
          evidence.phase = 'open'
          const window = await openChest(material)
          evidence.windowType = window.type
          evidence.inventoryStart = window.inventoryStart
          let targetId
          let diamondType
          let diamondsBefore
          let marker
          let verified
          try {
            await context.waitUntil(() => {
              const items = chestItems(window)
              return items.some(item => item.name === mapName) && items.some(item => item.name === 'diamond')
            }, { label: `${destination} chest contains map and diamond`, timeoutMs: 30000 })
            const items = chestItems(window)
            const map = items.find(item => item.name === mapName)
            const diamond = items.find(item => item.name === 'diamond')
            targetId = mapId(map)
            context.expect(items.length === 2 && map.count === 1 && diamond.count === 1,
              'Loot table must produce exactly one map and one diamond')
            context.expect((targetId !== undefined) === located, 'Only reachable destinations receive map data', {
              destination, components: map.components
            })
            const response = await command(`treasure-map-inspect ${destination}`,
              `TREASURE_MAP_INSPECT destination=${destination} diamonds=1 located=${located}`, 120000)
            verified = Object.fromEntries([...response.matchAll(/(mapId|targetX|targetZ|centerX|centerZ)=(-?\d+)/g)]
              .map(([, key, value]) => [key, Number(value)]))
            const decorations = simplifyNbt(map.componentMap?.get('map_decorations')?.data)
            marker = decorations?.['+']
            if (located) {
              context.expect(targetId === verified.mapId, 'Client and saved map IDs agree', { targetId, verified })
              context.expect(marker?.type === 'minecraft:red_x'
                && marker.x === verified.targetX && marker.z === verified.targetZ,
              'Map marker points to the verified pyramid', { marker, verified, components: map.components })
            } else {
              context.expect(marker === undefined, 'Missing destinations must not invent a map marker', { decorations })
            }
            diamondType = diamond.type
            diamondsBefore = context.bot.inventory.count(diamondType)
            evidence.phase = 'withdraw'
            evidence.diamondSlot = diamond.slot
            await bounded(`Withdraw diamond from ${material} ${destination}`,
              () => context.bot.clickWindow(diamond.slot, 0, 1))
            evidence.phase = 'withdrawn'
            await context.waitUntil(() => chestItems(window).every(item => item.name !== 'diamond'), {
              label: 'Diamond transferred out of the chest', timeoutMs: 10000
            })
          } finally {
            context.bot.closeWindow(window)
          }
          evidence.phase = 'reopen'
          const reopened = await openChest(material)
          try {
            await context.waitUntil(() => chestItems(reopened).some(item => item.name === mapName), {
              label: 'Saved map remains in the reopened chest', timeoutMs: 10000
            })
            const retained = chestItems(reopened)
            context.expect(retained.length === 1 && retained[0].name === mapName && retained[0].count === 1,
              'Reopening must not regenerate chest loot')
            context.expect(mapId(retained[0]) === targetId, 'Reopening must retain the same map data')
            context.expect(JSON.stringify(simplifyNbt(retained[0].componentMap?.get('map_decorations')?.data)?.['+'])
              === JSON.stringify(marker), 'Reopening must retain the same destination marker')
            await context.waitUntil(() => context.bot.inventory.count(diamondType) === diamondsBefore + 1, {
              label: 'Chest awards exactly one diamond', timeoutMs: 10000
            })
            Object.assign(evidence, { phase: 'complete', mapItem: mapName,
              mapId: targetId ?? null, marker: marker ?? null, verified, reopened: true })
          } finally {
            context.bot.closeWindow(reopened)
          }
        })
      }
    }
    await context.step('verify storage variants, insertion rollback, and locate event results', async () => {
      await command('treasure-extra-check', 'TREASURE_EXTRA_CHECK variants=9 rollback=true locateEvents=true', 120000)
    })
    await context.step('verify plugin loot runs on its owning region', async () => {
      await command('treasure-region-check', 'TREASURE_REGION_LOOT copper=8 normal=1 events=9 owned=true', 120000)
    })
    await context.step('verify native loot table reload support', async () => {
      await command('treasure-reload-before', 'TREASURE_RELOAD material=DIAMOND')
      if (context.report.treasurePlatform.folia) {
        const response = await context.command('/minecraft:reload', /Unknown or incomplete command|Reloading/i, 10000)
        context.expect(response.includes('Unknown or incomplete command'),
          'Folia fixture expects its unavailable data pack reload command', { response })
        context.report.treasureReload = { status: 'unavailable', before: 'diamond', evidence: response }
        return
      }
      const properties = await readFile(path.join(context.server.directory, 'server.properties'), 'utf8')
      const levelName = properties.match(/^level-name=(.+)$/m)?.[1].trim() ?? 'world'
      const tablePath = path.join(context.server.directory, levelName, 'datapacks', 'iris_treasure',
        'data', 'iris_qa', 'loot_table', 'reload.json')
      const original = await readFile(tablePath, 'utf8')
      const replacement = JSON.parse(original)
      context.expect(replacement.pools[0].entries[0].name === 'minecraft:diamond',
        'Reload fixture must start with its diamond table')
      const revision = async () => {
        const response = await command('treasure-resources', 'TREASURE_RESOURCES revision=')
        return Number(response.match(/revision=(\d+)/)?.[1])
      }
      const reload = async () => {
        const before = await revision()
        await context.command('/minecraft:reload', /Reloading/i, 30000)
        await context.waitUntil(async () => await revision() > before, {
          label: 'Server resource reload completed', timeoutMs: 120000, intervalMs: 500
        })
      }
      replacement.pools[0].entries[0].name = 'minecraft:emerald'
      try {
        await writeFile(tablePath, `${JSON.stringify(replacement, null, 2)}\n`)
        await reload()
        await command('treasure-reload-after', 'TREASURE_RELOAD material=EMERALD')
        context.report.treasureReload = { status: 'passed', before: 'diamond', after: 'emerald' }
      } finally {
        await writeFile(tablePath, original)
        if (!context.signal.aborted) {
          await reload()
          await command('treasure-reload-before', 'TREASURE_RELOAD material=DIAMOND')
        }
      }
    })
  }
 }
@@ -0,0 +1,143 @@
 import { readFile, realpath } from 'node:fs/promises'
 import path from 'node:path'
 const nonGround = new Set(['air', 'cave_air', 'void_air', 'water', 'lava', 'nether_wart_block', 'warped_wart_block'])
 const chunkOffsets = [-56, -40, -24, -8, 8, 24, 40, 56]
 function isWood(block) {
  return block !== null && /_(wood|hyphae|log|stem)$/.test(block.name)
 }
 function isGround(block) {
  return block !== null && block.boundingBox === 'block' && !nonGround.has(block.name)
    && !block.name.endsWith('_leaves') && !isWood(block)
 }
 function positionKey(position) {
  return `${position.x},${position.y},${position.z}`
 }
 function groundSpread(bot, base) {
  const heights = []
  for (const x of [-3, 0, 3]) {
    for (const z of [-3, 0, 3]) {
      for (let y = base.y + 6; y >= base.y - 8; y--) {
        if (!isGround(bot.blockAt(base.offset(x, y - base.y, z)))) continue
        heights.push(y)
        break
      }
    }
  }
  return heights.length === 9 ? Math.max(...heights) - Math.min(...heights) : null
 }
 function inspectTrees(context) {
  const bot = context.bot
  const center = bot.entity.position.floored()
  const woodIds = Object.values(bot.registry.blocksByName).filter(isWood).map(block => block.id)
  const positions = bot.findBlocks({ matching: woodIds, point: center, maxDistance: 64, count: 20000 })
  const columns = new Map()
  for (const position of positions) {
    const key = `${position.x},${position.z}`
    if (!columns.has(key)) columns.set(key, [])
    columns.get(key).push(position)
  }
  const trees = []
  for (const column of columns.values()) {
    column.sort((first, second) => first.y - second.y)
    const base = column[0]
    const height = column[column.length - 1].y - base.y + 1
    if (column.length < 8 || height < 8 || column.length / height < 0.65) continue
    if (column.some(position => position.distanceTo(center) >= 60)) continue
    if (![0, 1, 2, 3].every(y => isWood(bot.blockAt(base.offset(0, y, 0))))) continue
    const upperGaps = []
    for (let y = base.y; y < base.y + height; y++) {
      const block = bot.blockAt(base.offset(0, y - base.y, 0))
      if (block === null || !isWood(block)) upperGaps.push({ y, block: block?.name ?? null })
    }
    const grounded = isGround(bot.blockAt(base.offset(0, -1, 0)))
    const spread = groundSpread(bot, base)
    trees.push({ base: { x: base.x, y: base.y, z: base.z }, woodBlocks: column.length,
      height, grounded, terrainSpread: spread, upperGaps })
  }
  return trees
 }
 export default {
  name: 'iris-tree-grounding',
  description: 'Verify grounded spindle bases, continuous overlapping trunks, and paired pack geometry.',
  async run(context) {
    const directory = await realpath(context.server.directory)
    const source = await readFile(path.join(directory, '.server-source'), 'utf8')
    context.expect(/^isolated=true\s*$/m.test(source), 'Tree generation requires an isolated instance')
    const packs = await realpath(path.join(directory, 'plugins', 'Iris', 'packs'))
    context.expect(packs.startsWith(`${directory}${path.sep}`), 'Tree tests require local pack copies')
    context.report.treeWorlds = []
    context.report.treeGrounding = []
    context.report.treeContinuity = []
    for (const pack of ['overworld', 'underworld']) {
      const dimension = JSON.parse(await readFile(path.join(packs, pack, 'dimensions', `${pack}.json`), 'utf8'))
      context.expect(dimension.focus === 'estranged/spindlewood', 'Pack must focus on spindlewood', { pack })
      await context.step(`create ${pack} spindle world`, async () => {
        const world = `tree_${pack}_${Date.now().toString(36)}`
        const response = await context.command(`/iris create name=${world} type=${pack} seed=78264193`,
          /Successfully created your world|Failed to create/, 240000)
        context.expect(response.includes('Successfully created your world'), response)
        context.report.treeWorlds.push({ pack, name: world, seed: 78264193, biome: dimension.focus })
        if (context.bot.game.gameMode !== 'spectator') {
          await context.command('/minecraft:gamemode spectator', /spectator/i, 30000)
        }
        await context.waitUntil(() => context.bot.game.gameMode === 'spectator',
          { label: 'Spectator mode for terrain inspection', timeoutMs: 30000, intervalMs: 100 })
      })
      await context.step(`${pack} trees connect to flat and sloped terrain`, async () => {
        const origin = context.bot.entity.position.floored()
        const inspected = new Map()
        for (const offset of [0, 80, 160]) {
          await context.command(`/minecraft:tp @s ${origin.x + offset + 0.5} ${origin.y + 12} ${origin.z + 0.5}`,
            /Teleported/i, 30000)
          await context.waitUntil(() => {
            const center = context.bot.entity.position.floored()
            if (Math.abs(center.x - origin.x - offset) > 1) return false
            return chunkOffsets.every(x => chunkOffsets.every(z => context.bot.blockAt(center.offset(x, 0, z)) !== null))
          }, { label: 'Complete terrain neighborhood', timeoutMs: 90000, intervalMs: 250 })
          const trees = inspectTrees(context)
          for (const tree of trees) {
            context.expect(tree.grounded, 'Generated spindle trunk base has no terrain connection', { pack, ...tree })
            inspected.set(positionKey(tree.base), tree)
          }
          if (inspected.size >= 8 && [...inspected.values()].some(tree => tree.terrainSpread >= 2)) break
        }
        const trees = [...inspected.values()]
        const sloped = trees.filter(tree => tree.terrainSpread >= 2)
        context.expect(trees.length >= 8, 'Expected at least eight generated spindle trunk bases', { pack, trees })
        context.expect(sloped.length > 0, 'Expected a grounded tree on uneven terrain', { pack, trees })
        context.report.treeGrounding.push({ pack, trees: trees.length, sloped: sloped.length, samples: trees })
      })
      await context.step(`${pack} overlapping canopy preserves the seeded main trunk`, async () => {
        await context.command('/minecraft:tp @s 0.5 88 0.5', /Teleported/i, 30000)
        await context.waitUntil(() => {
          const center = context.bot.entity.position.floored()
          return Math.abs(center.x) < 2 && Math.abs(center.z) < 2
            && context.bot.blockAt(center.offset(-7 - center.x, 69 - center.y, 6 - center.z)) !== null
        }, { label: 'Seeded trunk neighborhood', timeoutMs: 90000, intervalMs: 250 })
        const center = context.bot.entity.position.floored()
        const blocks = []
        for (let y = 69; y <= 83; y++) {
          const block = context.bot.blockAt(center.offset(-7 - center.x, y - center.y, 6 - center.z))
          context.expect(isWood(block), 'Overlapping canopy interrupted the seeded main trunk',
            { pack, x: -7, y, z: 6, block: block?.name ?? null })
          blocks.push({ y, block: block.name })
        }
        context.report.treeContinuity.push({ pack, x: -7, z: 6, blocks })
      })
    }
    await context.step('paired packs retain matching sampled tree geometry', async () => {
      const geometry = context.report.treeGrounding.map(result => result.samples.map(tree => ({
        base: tree.base, woodBlocks: tree.woodBlocks, height: tree.height, terrainSpread: tree.terrainSpread
      })).sort((first, second) => positionKey(first.base).localeCompare(positionKey(second.base))))
      context.expect(JSON.stringify(geometry[0]) === JSON.stringify(geometry[1]),
        'Paired spindle packs produced different sampled geometry', { geometry })
    })
  }
 }
@@ -0,0 +1,230 @@
 package art.arcane.iris;
 import art.arcane.iris.configuration.IrisSettings;
 import art.arcane.iris.generation.runtime.Engine;
 import art.arcane.iris.generation.runtime.GenerationSessionLease;
 import art.arcane.iris.generation.runtime.GenerationSessionManager;
 import art.arcane.iris.platform.bukkit.BukkitWorldBinding;
 import art.arcane.iris.platform.bukkit.nms.INMS;
 import art.arcane.iris.platform.bukkit.nms.INMSBinding;
 import art.arcane.iris.spi.IrisServices;
 import art.arcane.iris.platform.generation.PlatformChunkGenerator;
 import art.arcane.iris.studio.view.PregeneratorJob;
 import art.arcane.iris.testsupport.PlatformBinding;
 import art.arcane.iris.world.IrisToolbelt;
 import art.arcane.iris.world.IrisWorld;
 import art.arcane.iris.world.WorldMaintenance;
 import art.arcane.iris.world.runtime.BukkitEnginePlatformHooks;
 import art.arcane.iris.world.task.J;
 import art.arcane.volmlib.nativelib.terrain.ServerShutdownBoundary;
 import org.bukkit.Bukkit;
 import org.bukkit.NamespacedKey;
 import org.bukkit.World;
 import org.junit.ClassRule;
 import org.junit.Test;
 import org.mockito.MockedStatic;
 import java.lang.reflect.Field;
 import java.lang.reflect.Method;
 import java.util.List;
 import java.util.concurrent.CompletableFuture;
 import java.util.concurrent.CopyOnWriteArrayList;
 import java.util.concurrent.CountDownLatch;
 import java.util.concurrent.TimeUnit;
 import java.util.concurrent.atomic.AtomicBoolean;
 import java.util.concurrent.atomic.AtomicReference;
 import static org.junit.Assert.assertEquals;
 import static org.junit.Assert.assertFalse;
 import static org.junit.Assert.assertTrue;
 import static org.mockito.ArgumentMatchers.anyLong;
 import static org.mockito.ArgumentMatchers.eq;
 import static org.mockito.Mockito.CALLS_REAL_METHODS;
 import static org.mockito.Mockito.mock;
 import static org.mockito.Mockito.mockStatic;
 import static org.mockito.Mockito.never;
 import static org.mockito.Mockito.times;
 import static org.mockito.Mockito.verify;
 import static org.mockito.Mockito.when;
 public class IrisShutdownMaintenanceTest {
    @ClassRule
    public static final PlatformBinding PLATFORM = PlatformBinding.mockPlatform();
    @Test
    public void finisherRetainsResourcesWhileTheAuthoritativeBoundaryIsPending() throws Exception {
        try (Fixture fixture = new Fixture()) {
            ServerShutdownBoundary boundary = mock(ServerShutdownBoundary.class);
            CountDownLatch waiting = new CountDownLatch(1);
            CountDownLatch release = new CountDownLatch(1);
            AtomicReference<Thread> finisher = new AtomicReference<>();
            when(boundary.await(anyLong(), eq(TimeUnit.SECONDS))).thenAnswer(invocation -> {
                finisher.set(Thread.currentThread());
                waiting.countDown();
                assertTrue(release.await(5, TimeUnit.SECONDS));
                return false;
            });
            setField(fixture.plugin, "serverShutdownBoundary", boundary);
            fixture.quiesce();
            fixture.startFinisher();
            try {
                assertTrue(waiting.await(5, TimeUnit.SECONDS));
                fixture.startFinisher();
                verify(fixture.generator, never()).closeAsync();
                verify(fixture.binding, never()).releasePluginClassLoaderClose();
            } finally {
                release.countDown();
                Thread running = finisher.get();
                if (running != null) {
                    running.join(5_000L);
                    assertFalse(running.isAlive());
                }
            }
            verify(boundary, times(1)).await(anyLong(), eq(TimeUnit.SECONDS));
            verify(fixture.generator, never()).closeAsync();
        }
    }
    @Test
    public void missingShutdownBoundaryDoesNotAuthorizeResourceRelease() throws Exception {
        try (Fixture fixture = new Fixture()) {
            Method method = Iris.class.getDeclaredMethod("awaitServerShutdownBoundary");
            method.setAccessible(true);
            assertEquals(false, method.invoke(fixture.plugin));
        }
    }
    @Test
    public void serverStopKeepsFoliaGenerationAdmittedUntilTheServerDrains() throws Exception {
        try (Fixture fixture = new Fixture()) {
            GenerationSessionManager sessions = new GenerationSessionManager();
            try (GenerationSessionLease active = sessions.acquireForEngine(fixture.engine, "active_chunk")) {
                fixture.quiesce();
                assertTrue(WorldMaintenance.isWorldMaintenanceActive(fixture.identity));
                assertFalse(fixture.hooks.shouldRefuseGeneration(fixture.engine));
                try (GenerationSessionLease queued = sessions.acquireForEngine(fixture.engine, "queued_chunk")) {
                    assertEquals(active.sessionId(), queued.sessionId());
                    assertEquals(2, sessions.activeLeases());
                }
                verify(fixture.generator).quiesceForServerShutdown();
                verify(fixture.generator, never()).closeAsync();
                fixture.nms.verify(INMS::get);
                verify(fixture.binding).deferPluginClassLoaderClose();
                verify(fixture.binding, never()).releasePluginClassLoaderClose();
            }
            assertEquals(0, sessions.activeLeases());
            fixture.drain();
            verify(fixture.generator).closeAsync();
        }
    }
    @Test
    public void serverStopDoesNotOverrideExistingBlockingMaintenance() throws Exception {
        try (Fixture fixture = new Fixture()) {
            WorldMaintenance.beginWorldMaintenance(fixture.identity, "world_unload", true);
            try {
                fixture.quiesce();
                assertTrue(fixture.hooks.shouldRefuseGeneration(fixture.engine));
            } finally {
                WorldMaintenance.endWorldMaintenance(fixture.identity, "world_unload", true);
            }
            assertFalse(fixture.hooks.shouldRefuseGeneration(fixture.engine));
        }
    }
    @Test
    public void manualDisableStillBlocksGenerationBeforeClosingTheGenerator() throws Exception {
        try (Fixture fixture = new Fixture()) {
            when(fixture.generator.closeAsync()).thenAnswer(invocation -> {
                assertTrue(fixture.hooks.shouldRefuseGeneration(fixture.engine));
                return CompletableFuture.completedFuture(null);
            });
            try {
                fixture.drain();
                assertTrue(fixture.hooks.shouldRefuseGeneration(fixture.engine));
                verify(fixture.generator).closeAsync();
                verify(fixture.generator, never()).quiesceForServerShutdown();
            } finally {
                WorldMaintenance.endWorldMaintenance(fixture.identity, "manual_disable", true);
            }
        }
    }
    private static void setField(Iris plugin, String name, Object value) throws ReflectiveOperationException {
        Field field = Iris.class.getDeclaredField(name);
        field.setAccessible(true);
        field.set(plugin, value);
    }
    private static final class Fixture implements AutoCloseable {
        private final Iris plugin = mock(Iris.class);
        private final World world = mock(World.class);
        private final IrisWorld irisWorld = mock(IrisWorld.class);
        private final Engine engine = mock(Engine.class);
        private final PlatformChunkGenerator generator = mock(PlatformChunkGenerator.class);
        private final BukkitEnginePlatformHooks hooks = new BukkitEnginePlatformHooks();
        private final INMSBinding binding = mock(INMSBinding.class);
        private final String identity = "iris:shutdown_test";
        private final IrisSettings previousSettings = IrisSettings.settings;
        private final MockedStatic<Bukkit> bukkit = mockStatic(Bukkit.class);
        private final MockedStatic<IrisToolbelt> toolbelt = mockStatic(IrisToolbelt.class, CALLS_REAL_METHODS);
        private final MockedStatic<BukkitWorldBinding> worlds = mockStatic(BukkitWorldBinding.class);
        private final MockedStatic<IrisServices> services = mockStatic(IrisServices.class);
        private final MockedStatic<INMS> nms = mockStatic(INMS.class);
        private final MockedStatic<J> tasks = mockStatic(J.class, CALLS_REAL_METHODS);
        private final MockedStatic<PregeneratorJob> pregenerator = mockStatic(PregeneratorJob.class);
        private int quiesces;
        private Fixture() throws ReflectiveOperationException {
            IrisSettings.settings = new IrisSettings();
            setField(plugin, "serverStopTeardownDeferred", new AtomicBoolean());
            setField(plugin, "postStopFinisherStarted", new AtomicBoolean());
            setField(plugin, "deferredShutdownGenerators", new CopyOnWriteArrayList<PlatformChunkGenerator>());
            when(world.getKey()).thenReturn(NamespacedKey.fromString(identity));
            when(engine.getWorld()).thenReturn(irisWorld);
            when(irisWorld.hasPlatformWorld()).thenReturn(true);
            when(irisWorld.identity()).thenReturn(identity);
            when(generator.closeAsync()).thenReturn(CompletableFuture.completedFuture(null));
            bukkit.when(Bukkit::getWorlds).thenReturn(List.of(world));
            toolbelt.when(() -> IrisToolbelt.access(world)).thenReturn(generator);
            worlds.when(() -> BukkitWorldBinding.world(irisWorld)).thenReturn(world);
            nms.when(INMS::get).thenReturn(binding);
            tasks.when(J::isFolia).thenReturn(true);
        }
        private void quiesce() throws ReflectiveOperationException {
            Method method = Iris.class.getDeclaredMethod("quiesceRuntimeForServerShutdown", String.class);
            method.setAccessible(true);
            method.invoke(plugin, "server_stop");
            quiesces++;
        }
        private void drain() throws ReflectiveOperationException {
            Method method = Iris.class.getDeclaredMethod("drainWorldGenerators", String.class, long.class);
            method.setAccessible(true);
            method.invoke(plugin, "manual_disable", 5L);
        }
        private void startFinisher() throws ReflectiveOperationException {
            Method method = Iris.class.getDeclaredMethod("startPostStopFinisher");
            method.setAccessible(true);
            method.invoke(plugin);
        }
        @Override
        public void close() {
            for (int index = 0; index < quiesces; index++) {
                WorldMaintenance.endWorldMaintenance(identity, "server_stop");
            }
            pregenerator.close();
            tasks.close();
            nms.close();
            services.close();
            worlds.close();
            toolbelt.close();
            bukkit.close();
            IrisSettings.settings = previousSettings;
        }
    }
 }
@@ -0,0 +1,67 @@
 package art.arcane.iris;
 import org.bukkit.Bukkit;
 import org.bukkit.plugin.PluginDescriptionFile;
 import org.junit.Test;
 import org.mockito.MockedStatic;
 import java.io.InputStream;
 import java.util.List;
 import static org.junit.Assert.assertEquals;
 import static org.junit.Assert.assertNotEquals;
 import static org.junit.Assert.assertNotNull;
 import static org.mockito.Answers.CALLS_REAL_METHODS;
 import static org.mockito.Mockito.doReturn;
 import static org.mockito.Mockito.mock;
 import static org.mockito.Mockito.mockStatic;
 public class IrisVersionNumberTest {
    @Test
    public void releaseAndQualifiedBuildsUseTheSameVersionNumber() {
        for (String version : List.of("4.3.3", "4.3.3-SNAPSHOT", "4.3.3-test")) {
            assertEquals(version, 433, plugin(version).getIrisVersion());
        }
    }
    @Test
    public void processedPluginMetadataProvidesAValidEngineVersion() throws Exception {
        try (InputStream stream = getClass().getResourceAsStream("/plugin.yml")) {
            assertNotNull(stream);
            PluginDescriptionFile description = new PluginDescriptionFile(stream);
            Iris plugin = mock(Iris.class, CALLS_REAL_METHODS);
            doReturn(description).when(plugin).getDescription();
            assertNotEquals(-1, plugin.getIrisVersion());
        }
    }
    @Test
    public void malformedAndOverflowingReleaseNumbersStayInvalid() {
        for (String version : List.of("development", "4..3", ".4.3.3", "4.3.3.", "4.3a.3-test",
                "2147483648", "999999999999999999999-SNAPSHOT", "-SNAPSHOT")) {
            assertEquals(version, -1, plugin(version).getIrisVersion());
        }
    }
    @Test
    public void supportedMinecraftVersionsRetainTheirEngineNumbers() {
        Iris plugin = mock(Iris.class, CALLS_REAL_METHODS);
        try (MockedStatic<Bukkit> bukkit = mockStatic(Bukkit.class)) {
            bukkit.when(Bukkit::getVersion).thenReturn("26.1.2-74-ver/26.1.2@e4e17fc (MC: 26.1.2)");
            assertEquals(2612, plugin.getMCVersion());
            bukkit.when(Bukkit::getVersion).thenReturn("26.1.2-8-ver/26.1.x@62dc0f2 (MC: 26.1.2)");
            assertEquals(2612, plugin.getMCVersion());
            bukkit.when(Bukkit::getVersion).thenReturn("26.2-133 (MC: 26.2)");
            assertEquals(262, plugin.getMCVersion());
            bukkit.when(Bukkit::getVersion).thenReturn("26.3-169 (MC: 26.3)");
            assertEquals(263, plugin.getMCVersion());
        }
    }
    private static Iris plugin(String version) {
        Iris plugin = mock(Iris.class, CALLS_REAL_METHODS);
        doReturn(new PluginDescriptionFile("Iris", version, Iris.class.getName())).when(plugin).getDescription();
        return plugin;
    }
 }
@@ -22,6 +22,7 @@ import org.gradle.api.file.FileCopyDetails
 import org.gradle.api.file.FileSystemOperations
 import org.gradle.api.file.FileTree
 import org.gradle.api.tasks.compile.JavaCompile
 import org.gradle.api.attributes.Bundling
 import org.gradle.jvm.toolchain.JavaLanguageVersion
 import javax.inject.Inject
@@ -38,10 +39,14 @@ buildscript {
 plugins {
    id 'java'
-    id 'net.fabricmc.fabric-loom' version '1.17.14'
+    id 'net.fabricmc.fabric-loom' version '1.17.21' apply false
    id 'net.fabricmc.fabric-loom-remap' version '1.17.21' apply false
    alias(libs.plugins.shadow)
 }
 apply from: file('../../gradle/mod-target.gradle')
 apply plugin: irisModTarget.fabricRemap ? 'net.fabricmc.fabric-loom-remap' : 'net.fabricmc.fabric-loom'
 apply plugin: 'art.arcane.volmit-packaging'
 interface IrisFileOperations {
@@ -56,9 +61,9 @@ apply from: file('../../gradle/volmlib-stamp.gradle')
 Properties rootProperties = new Properties()
 file('../../gradle.properties').withInputStream { InputStream stream -> rootProperties.load(stream) }
-String irisVersion = providers.gradleProperty('irisVersion').getOrElse(rootProperties.getProperty('irisVersion', '4.3.3-26.2'))
+String irisVersion = providers.gradleProperty('irisVersion').getOrElse(rootProperties.getProperty('irisVersion', '4.3.5'))
 String minecraftVersion = providers.gradleProperty('minecraftVersion').getOrElse(rootProperties.getProperty('minecraftVersion', '26.3'))
-String fabricLoaderVersion = providers.gradleProperty('fabricLoaderVersion').getOrElse(rootProperties.getProperty('fabricLoaderVersion', '0.19.5'))
+String fabricLoaderVersion = providers.gradleProperty('fabricLoaderVersion').getOrElse(irisModTarget.fabricLoader.toString())
 Closure<String> irisArtifactName = { String platform, String targetVersion ->
    return "Iris v${project.version} [${platform}] ${targetVersion}.jar"
 }
@@ -141,7 +146,11 @@ configurations.create('jij') {
 dependencies {
    minecraft("com.mojang:minecraft:${minecraftVersion}")
-    implementation("net.fabricmc:fabric-loader:${fabricLoaderVersion}")
+    if (irisModTarget.fabricRemap) {
        mappings(loom.officialMojangMappings())
    }
    String modConfiguration = irisModTarget.fabricRemap ? 'modImplementation' : 'implementation'
    add(modConfiguration, "net.fabricmc:fabric-loader:${fabricLoaderVersion}")
    testImplementation('junit:junit:4.13.2')
    testImplementation('org.mockito:mockito-core:5.23.0')
    testImplementation(testFixtures('art.arcane:core'))
@@ -168,11 +177,19 @@ dependencies {
        libs.fabricApi.keyMapping,
        libs.fabricApi.permission
    ]
    if (irisModTarget.fabricModules != null) {
        fabricApi = ((Map<String, String>) irisModTarget.fabricModules).collect { String module, String moduleVersion ->
            "net.fabricmc.fabric-api:${module}:${moduleVersion}".toString()
        }
    }
    if (irisModTarget.fabricPermissions != null) {
        fabricApi.add("me.lucko:fabric-permissions-api:${irisModTarget.fabricPermissions}".toString())
    }
    fabricApi.each { Object notation ->
        add('jij', notation)
-        add('implementation', notation)
+        add(modConfiguration, notation)
    }
-    compileOnly('org.slf4j:slf4j-api:2.0.17')
+    compileOnly("org.slf4j:slf4j-api:${irisModTarget.slf4j}")
    compileOnly(libs.spigot) {
        transitive = false
    }
@@ -201,21 +218,28 @@ dependencies {
        libs.jaxen
    ]
    shared.each { Object notation ->
-        add('bundle', notation)
+        ['bundle', 'devBundle'].each { String configuration ->
-        add('devBundle', notation)
+            add(configuration, notation) {
                if (group == 'art.arcane' && name == 'core') {
                    attributes {
                        attribute(Bundling.BUNDLING_ATTRIBUTE, objects.named(Bundling, Bundling.EXTERNAL))
                    }
                }
            }
        }
    }
 }
 tasks.named('compileJava', JavaCompile).configure {
    options.encoding = 'UTF-8'
-    options.release.set(25)
+    options.release.set((int) irisModTarget.java)
 }
 tasks.named('test').configure {
 }
 loom {
-    accessWidenerPath = art.arcane.volmit.packaging.NativeAccessRules.prepare(nativeSourceImplementation, "fabric", layout.buildDirectory.dir("native-access").get().asFile)
+    accessWidenerPath = art.arcane.volmit.packaging.NativeAccessRules.prepare(irisModTarget.nativeAccess.toString(), "fabric", layout.buildDirectory.dir("native-access").get().asFile)
    runs {
        client {
            runDir(providers.gradleProperty('irisClientRunDir').getOrElse('run'))
@@ -270,6 +294,15 @@ Map<String, String> nestedFabricApiJars = [
    'fabric-permission-api-v1'   : 'fabric-permission-api-v1.jar'
 ]
 if (irisModTarget.fabricModules != null) {
    nestedFabricApiJars = ((Map<String, String>) irisModTarget.fabricModules).collectEntries { String module, String ignored ->
        [(module): "${module}.jar".toString()]
    }
 }
 if (irisModTarget.fabricPermissions != null) {
    nestedFabricApiJars.put('fabric-permissions-api', 'fabric-permissions-api.jar')
 }
 FileTree staleLoaderJars = fileTree(layout.buildDirectory.dir('libs')) {
    include('Iris v* [Fabric] *.jar')
    include('iris-fabric-*.jar')
@@ -288,6 +321,10 @@ tasks.named('shadowJar', ShadowJar).configure {
    archiveFileName.set(irisArtifactName('Fabric', "${minecraftVersion}+${fabricLoaderVersion}"))
    configurations = [project.configurations.named('bundle').get()]
    mergeServiceFiles()
    if ((int) irisModTarget.java == 21) {
        exclude('art/arcane/volmlib/util/noise/NativeBillowLoader*.class')
        exclude('art/arcane/volmlib/util/noise/BillowBatch*.class')
    }
    exclude('META-INF/maven/**')
    exclude('META-INF/proguard/**')
    exclude('META-INF/*.SF')
@@ -346,28 +383,39 @@ tasks.named('shadowJar', ShadowJar).configure {
    }
 }
-// The thin `jar`/`remapJar` outputs carry valid fabric.mod.json metadata but bundle zero
+// The thin jar omits bundled dependencies. Obfuscated targets remap the complete shadow jar.
 // dependencies. Installing one is an instant NoClassDefFoundError, and they sit in build/libs right
 // next to the real artifact. shadowJar is the only shippable Fabric jar.
 tasks.named('jar').configure {
    enabled = false
 }
 tasks.matching { it.name == 'remapJar' }.configureEach {
-    enabled = false
+    enabled = (boolean) irisModTarget.fabricRemap
    if (irisModTarget.fabricRemap) {
        dependsOn(tasks.named('shadowJar'))
        inputFile.set(tasks.named('shadowJar', ShadowJar).flatMap { it.archiveFile })
        archiveFileName.set(irisArtifactName('Fabric', "${minecraftVersion}+${fabricLoaderVersion}"))
        addNestedDependencies.set(false)
    }
 }
 if (irisModTarget.fabricRemap) {
    tasks.named('shadowJar', ShadowJar).configure {
        destinationDirectory.set(layout.buildDirectory.dir('devlibs'))
    }
 }
 tasks.named('assemble').configure {
-    dependsOn(tasks.named('shadowJar'))
+    dependsOn(tasks.named(irisModTarget.fabricRemap ? 'remapJar' : 'shadowJar'))
 }
 pluginPackaging {
    artifacts {
        create('distribution') {
-            taskName = 'shadowJar'
+            taskName = irisModTarget.fabricRemap ? 'remapJar' : 'shadowJar'
            policyName = 'Iris Fabric'
            prunePrefixes = ['art/arcane/volmlib/']
            keepPrefixes = ['art/arcane/volmlib/util/matter/slices/']
        }
    }
 }
 apply from: file('../../gradle/modded-version-sources.gradle')
@@ -33,6 +33,8 @@ plugins {
 rootProject.name = 'iris-fabric'
 apply from: new File(settingsDir, '../../gradle/runtime-cache.settings.gradle').canonicalFile
 dependencyResolutionManagement {
    versionCatalogs {
        libs {
@@ -0,0 +1,78 @@
 {
  "schemaVersion": 1,
  "id": "irisworldgen",
  "version": "${version}",
  "name": "Iris",
  "description": "Iris World Generation Engine (Fabric adapter - native chunk generator, explicit Iris world datapack workflow, engine lifecycle)",
  "authors": [
    "Arcane Arts (Volmit Software)"
  ],
  "contributors": [
    "cyberpwn",
    "NextdoorPsycho",
    "Vatuu"
  ],
  "contact": {
    "homepage": "https://docs.volmit.com/iris/",
    "issues": "https://github.com/VolmitSoftware/Iris/issues",
    "sources": "https://github.com/VolmitSoftware/Iris"
  },
  "license": "GPL-3.0",
  "icon": "assets/irisworldgen/icon.png",
  "environment": "*",
  "accessWidener": "volmlib.accesswidener",
  "mixins": [
    "volmlib.fabric.mixins.json",
    "volmlib.entity.mixins.json",
    {
      "config": "volmlib.client.mixins.json",
      "environment": "client"
    }
  ],
  "entrypoints": {
    "main": [
      "art.arcane.iris.fabric.IrisFabricBootstrap"
    ],
    "client": [
      "art.arcane.iris.fabric.IrisFabricClient"
    ]
  },
  "jars": [
    {
      "file": "META-INF/jars/fabric-api-base.jar"
    },
    {
      "file": "META-INF/jars/fabric-registry-sync-v0.jar"
    },
    {
      "file": "META-INF/jars/fabric-resource-loader-v0.jar"
    },
    {
      "file": "META-INF/jars/fabric-lifecycle-events-v1.jar"
    },
    {
      "file": "META-INF/jars/fabric-command-api-v2.jar"
    },
    {
      "file": "META-INF/jars/fabric-events-interaction-v0.jar"
    },
    {
      "file": "META-INF/jars/fabric-networking-api-v1.jar"
    },
    {
      "file": "META-INF/jars/fabric-rendering-v1.jar"
    },
    {
      "file": "META-INF/jars/fabric-key-binding-api-v1.jar"
    },
    {
      "file": "META-INF/jars/fabric-permissions-api.jar"
    }
  ],
  "depends": {
    "fabricloader": ">=0.19.5",
    "minecraft": "${minecraftVersion}",
    "java": ">=21",
    "fabric-permissions-api-v0": "*"
  }
 }
@@ -0,0 +1,102 @@
 package art.arcane.volmlib.nativelib.minecraft26_2.fabric;
 import art.arcane.volmlib.nativelib.minecraft26_2.terrain.NativeRegistryDefinitions;
 import art.arcane.volmlib.nativelib.modded.NativeLoaderOptions;
 import com.google.gson.JsonParser;
 import com.mojang.serialization.JsonOps;
 import com.mojang.serialization.Lifecycle;
 import net.minecraft.SharedConstants;
 import net.minecraft.core.Holder;
 import net.minecraft.core.HolderSet;
 import net.minecraft.core.MappedRegistry;
 import net.minecraft.core.RegistrationInfo;
 import net.minecraft.core.RegistryAccess;
 import net.minecraft.core.registries.Registries;
 import net.minecraft.resources.ResourceLocation;
 import net.minecraft.resources.RegistryOps;
 import net.minecraft.resources.ResourceKey;
 import net.minecraft.server.Bootstrap;
 import net.minecraft.world.level.biome.Biome;
 import net.minecraft.world.level.biome.BiomeGenerationSettings;
 import net.minecraft.world.level.levelgen.GenerationStep;
 import net.minecraft.world.level.levelgen.carver.ConfiguredWorldCarver;
 import net.minecraft.world.level.levelgen.feature.ConfiguredFeature;
 import net.minecraft.world.level.levelgen.placement.PlacedFeature;
 import org.junit.BeforeClass;
 import org.junit.Test;
 import java.lang.reflect.Constructor;
 import java.lang.reflect.Field;
 import java.util.ArrayList;
 import java.util.List;
 import java.util.function.BooleanSupplier;
 import static org.junit.Assert.assertEquals;
 import static org.junit.Assert.assertTrue;
 import static org.mockito.Mockito.mock;
 public class NativeFabricBiomeDefinitionTest {
    private static final String BIOME_REGISTRY = "minecraft:worldgen/biome";
    private static final String BIOME_KEY = "iris:biomes/fabric_modified";
    private static final String SOURCE_JSON = "{\"has_precipitation\":true,\"temperature\":0.8,\"downfall\":0.4,"
            + "\"effects\":{\"fog_color\":12638463,\"water_color\":4159204,\"water_fog_color\":329011,\"sky_color\":7907327},"
            + "\"carvers\":{},\"features\":[],\"spawners\":{},\"spawn_costs\":{}}";
    @BeforeClass
    public static void bootstrap() {
        SharedConstants.tryDetectVersion();
        Bootstrap.bootStrap();
    }
    @Test
    public void generatedBiomeDefinitionExcludesFabricBiomeModifications() throws Exception {
        MappedRegistry<PlacedFeature> features = new MappedRegistry<>(Registries.PLACED_FEATURE, Lifecycle.stable());
        Holder.Reference<PlacedFeature> ore = features.register(
                ResourceKey.create(Registries.PLACED_FEATURE, ResourceLocation.parse("iris:modded_ore")),
                new PlacedFeature(Holder.direct(mock(ConfiguredFeature.class)), List.of()),
                RegistrationInfo.BUILT_IN);
        features.freeze();
        MappedRegistry<ConfiguredWorldCarver<?>> carvers = new MappedRegistry<>(Registries.CONFIGURED_CARVER, Lifecycle.stable());
        carvers.freeze();
        MappedRegistry<Biome> biomes = new MappedRegistry<>(Registries.BIOME, Lifecycle.stable());
        RegistryAccess access = new RegistryAccess.ImmutableRegistryAccess(List.of(biomes, features, carvers));
        Biome source = Biome.DIRECT_CODEC.parse(RegistryOps.create(JsonOps.INSTANCE, access),
                JsonParser.parseString(SOURCE_JSON)).getOrThrow();
        NativeFabricLoader loader = new NativeFabricLoader(new NativeLoaderOptions("irisworldgen", "treefeller",
                BooleanSupplier::getAsBoolean));
        loader.recordOriginalBiome(source);
        Holder.Reference<Biome> biome = biomes.register(
                ResourceKey.create(Registries.BIOME, ResourceLocation.parse(BIOME_KEY)), source, RegistrationInfo.BUILT_IN);
        biomes.freeze();
        addFeatureInPlace(biome.value().getGenerationSettings(), ore);
        warmInPlace(biome.value());
        NativeRegistryDefinitions definitions = new NativeRegistryDefinitions(() -> access, loader::unmodifiedBiome);
        assertEquals(0.1F, biome.value().getBaseTemperature(), 0.0F);
        assertTrue(biome.value().getGenerationSettings().features()
                .get(GenerationStep.Decoration.UNDERGROUND_ORES.ordinal()).contains(ore));
        assertEquals(JsonParser.parseString(definitions.canonicalDefinition(BIOME_REGISTRY, BIOME_KEY, SOURCE_JSON).value()),
                JsonParser.parseString(definitions.generatedDefinition(BIOME_REGISTRY, BIOME_KEY).value()));
    }
    private static void addFeatureInPlace(BiomeGenerationSettings settings, Holder<PlacedFeature> feature)
            throws ReflectiveOperationException {
        List<HolderSet<PlacedFeature>> steps = new ArrayList<>(settings.features());
        while (steps.size() <= GenerationStep.Decoration.UNDERGROUND_ORES.ordinal()) {
            steps.add(HolderSet.direct());
        }
        steps.set(GenerationStep.Decoration.UNDERGROUND_ORES.ordinal(), HolderSet.direct(feature));
        Field features = BiomeGenerationSettings.class.getDeclaredField("features");
        features.setAccessible(true);
        features.set(settings, List.copyOf(steps));
    }
    private static void warmInPlace(Biome biome) throws ReflectiveOperationException {
        Constructor<Biome.ClimateSettings> climate = Biome.ClimateSettings.class.getDeclaredConstructor(
                boolean.class, float.class, Biome.TemperatureModifier.class, float.class);
        climate.setAccessible(true);
        Field climateSettings = Biome.class.getDeclaredField("climateSettings");
        climateSettings.setAccessible(true);
        climateSettings.set(biome, climate.newInstance(true, 0.1F, Biome.TemperatureModifier.NONE, 0.4F));
    }
 }
@@ -17,11 +17,13 @@
 */
 import com.github.jengelman.gradle.plugins.shadow.tasks.ShadowJar
 import net.minecraftforge.gradle.shadow.net.minecraftforge.gradleutils.shared.EnhancedPlugin
 import org.gradle.api.file.DeleteSpec
 import org.gradle.api.file.FileCopyDetails
 import org.gradle.api.file.FileSystemOperations
 import org.gradle.api.file.FileTree
 import org.gradle.api.tasks.compile.JavaCompile
 import org.gradle.api.attributes.Bundling
 import org.gradle.jvm.toolchain.JavaLanguageVersion
 import javax.inject.Inject
@@ -42,6 +44,8 @@ plugins {
    alias(libs.plugins.shadow)
 }
 apply from: file('../../gradle/mod-target.gradle')
 apply plugin: 'art.arcane.volmit-packaging'
 interface IrisFileOperations {
@@ -56,9 +60,20 @@ apply from: file('../../gradle/volmlib-stamp.gradle')
 Properties rootProperties = new Properties()
 file('../../gradle.properties').withInputStream { InputStream stream -> rootProperties.load(stream) }
-String irisVersion = providers.gradleProperty('irisVersion').getOrElse(rootProperties.getProperty('irisVersion', '4.3.3-26.2'))
+String irisVersion = providers.gradleProperty('irisVersion').getOrElse(rootProperties.getProperty('irisVersion', '4.3.5'))
 String minecraftVersion = providers.gradleProperty('minecraftVersion').getOrElse(rootProperties.getProperty('minecraftVersion', '26.3'))
-String forgeVersion = providers.gradleProperty('forgeVersion').getOrElse(rootProperties.getProperty('forgeVersion', '26.3-66.0.8'))
+String forgeVersion = providers.gradleProperty('forgeVersion').getOrElse(irisModTarget.forge.toString())
 String buildLane = gradle.extensions.extraProperties.has('irisBuildLane')
    ? gradle.extensions.extraProperties.get('irisBuildLane').toString() : null
 if (buildLane != null) {
    File laneCache = providers.gradleProperty('multiplexorSandbox').getOrElse('false').toBoolean()
        ? new File(gradle.gradleUserHomeDir, "caches/iris-forge/${buildLane}")
        : file(".gradle/iris-lanes/${buildLane}")
    plugins.withType(EnhancedPlugin).configureEach { EnhancedPlugin<?> forgePlugin ->
        forgePlugin.globalCaches().set(new File(laneCache, 'forgegradle'))
    }
    minecraft.mavenizerOutput.set(new File(laneCache, 'mavenizer/repo'))
 }
 Closure<String> loaderDisplayVersion = { String loaderVersion ->
    String coordinatePrefix = "${minecraftVersion}-"
    if (loaderVersion.startsWith(coordinatePrefix)) {
@@ -158,14 +173,16 @@ configurations.testRuntimeClasspath.extendsFrom(configurations.runtimeClasspath,
 }
 dependencies {
-    implementation minecraft.dependency("net.minecraftforge:forge:${forgeVersion}")
+    implementation(buildLane == null
        ? minecraft.dependency("net.minecraftforge:forge:${forgeVersion}")
        : minecraft.dependency("iris-${buildLane}", "net.minecraftforge:forge:${forgeVersion}"))
    testImplementation('junit:junit:4.13.2')
    testImplementation('org.mockito:mockito-core:5.23.0')
    testImplementation(testFixtures('art.arcane:core'))
    testImplementation(libs.spigot) {
        transitive = false
    }
-    compileOnly('org.slf4j:slf4j-api:2.0.17')
+    compileOnly("org.slf4j:slf4j-api:${irisModTarget.slf4j}")
    compileOnly(libs.spigot) {
        transitive = false
    }
@@ -200,14 +217,23 @@ dependencies {
        libs.jaxen
    ]
    shared.each { Object notation ->
-        add('bundle', notation)
+        ['bundle', 'devBundle', 'runBundle'].each { String configuration ->
-        add('devBundle', notation)
+            add(configuration, notation) {
-        add('runBundle', notation)
+                if (group == 'art.arcane' && name == 'core') {
                    attributes {
                        attribute(Bundling.BUNDLING_ATTRIBUTE, objects.named(Bundling, Bundling.EXTERNAL))
                    }
                }
            }
        }
    }
 }
 minecraft {
-    accessTransformer.from(art.arcane.volmit.packaging.NativeAccessRules.prepare(nativeSourceImplementation, "forge", layout.buildDirectory.dir("native-access").get().asFile))
+    if (irisModTarget.fabricRemap) {
        mappings channel: 'official', version: minecraftVersion
    }
    accessTransformer.from(art.arcane.volmit.packaging.NativeAccessRules.prepare(irisModTarget.nativeAccess.toString(), "forge", layout.buildDirectory.dir("native-access").get().asFile))
    runs {
        register('client') {
            workingDir = layout.projectDirectory.dir('run')
@@ -241,7 +267,8 @@ minecraft {
 tasks.named('compileJava', JavaCompile).configure {
    options.encoding = 'UTF-8'
-    options.release.set(25)
+    options.compilerArgs.addAll(['-Xmaxerrs', '2000'])
    options.release.set((int) irisModTarget.java)
 }
 tasks.named('test').configure {
@@ -250,8 +277,9 @@ tasks.named('test').configure {
 processResources {
    inputs.property('version', irisVersion)
    inputs.property('minecraftVersion', minecraftVersion)
    inputs.property('loaderRange', irisModTarget.forgeRange.toString())
    filesMatching('META-INF/mods.toml') {
-        expand('version': irisVersion, 'minecraftVersion': minecraftVersion)
+        expand('version': irisVersion, 'minecraftVersion': minecraftVersion, 'loaderRange': irisModTarget.forgeRange.toString())
    }
 }
@@ -280,6 +308,10 @@ tasks.named('shadowJar', ShadowJar).configure {
    configurations = [project.configurations.named('bundle').get()]
    from(sourceSets.main.output)
    mergeServiceFiles()
    if ((int) irisModTarget.java == 21) {
        exclude('art/arcane/volmlib/util/noise/NativeBillowLoader*.class')
        exclude('art/arcane/volmlib/util/noise/BillowBatch*.class')
    }
    exclude('META-INF/maven/**')
    exclude('META-INF/proguard/**')
    exclude('META-INF/*.SF')
@@ -345,3 +377,5 @@ pluginPackaging {
        }
    }
 }
 apply from: file('../../gradle/modded-version-sources.gradle')
@@ -33,6 +33,8 @@ plugins {
 rootProject.name = 'iris-forge'
 apply from: new File(settingsDir, '../../gradle/runtime-cache.settings.gradle').canonicalFile
 dependencyResolutionManagement {
    versionCatalogs {
        libs {
@@ -1,5 +1,5 @@
 modLoader = "javafml"
-loaderVersion = "[66,67)"
+loaderVersion = "${loaderRange}"
 license = "GPL-3.0"
 issueTrackerURL = "https://github.com/VolmitSoftware/Iris/issues"
@@ -16,7 +16,7 @@ logoFile = "assets/irisworldgen/icon.png"
 [[dependencies.irisworldgen]]
 modId = "forge"
 mandatory = true
-versionRange = "[66,67)"
+versionRange = "${loaderRange}"
 ordering = "NONE"
 side = "BOTH"
@@ -0,0 +1,29 @@
 package art.arcane.iris.forge;
 import art.arcane.iris.modded.IrisModdedChunkGenerator;
 import art.arcane.iris.modded.ModdedEngineBootstrap;
 import art.arcane.iris.modded.ModdedLifecycleCallbacks;
 import art.arcane.iris.modded.service.ModdedTreeFellerService;
 import art.arcane.volmlib.nativelib.modded.NativeLoaderOptions;
 import art.arcane.volmlib.nativelib.minecraft26_2.modded.NativeChunkGeneratorDefinition;
 import art.arcane.volmlib.nativelib.minecraft26_2.forge.NativeForgeLoader;
 import art.arcane.volmlib.nativelib.minecraft26_2.forge.NativeForgeBootstrap;
 import net.minecraftforge.fml.common.Mod;
 import net.minecraftforge.fml.javafmlmod.FMLJavaModLoadingContext;
 import net.minecraftforge.fml.loading.FMLLoader;
@Mod("irisworldgen")
 public final class IrisForgeBootstrap {
    public IrisForgeBootstrap(FMLJavaModLoadingContext context) {
        NativeForgeLoader loader = new NativeForgeLoader(new NativeLoaderOptions(
                "irisworldgen", "treefeller", ModdedTreeFellerService::runBreakProbe));
        NativeChunkGeneratorDefinition generator = IrisModdedChunkGenerator.DEFINITION;
        ModdedEngineBootstrap.bootCommon(loader, "Forge " + FMLLoader.versionInfo().forgeVersion(),
                () -> NativeForgeBootstrap.registerGenerators(context, generator, "block_drops"));
        ForgeProtocolNetworking.register();
        if (loader.clientEnvironment()) {
            IrisForgeClient.init(context);
        }
        NativeForgeBootstrap.install(context, loader, ModdedLifecycleCallbacks.create());
    }
 }
@@ -0,0 +1,25 @@
 package art.arcane.iris.forge;
 import art.arcane.iris.client.IrisClient;
 import net.minecraftforge.fml.javafmlmod.FMLJavaModLoadingContext;
 import art.arcane.volmlib.nativelib.minecraft26_2.forge.NativeForgeClientHooks;
 import art.arcane.iris.client.IrisClientHud;
 import art.arcane.volmlib.nativelib.minecraft26_2.modded.NativeProtocolChannel;
 public final class IrisForgeClient {
    private IrisForgeClient() {
    }
    public static void init(FMLJavaModLoadingContext context) {
        IrisClient.bindSender(IrisForgeClient::sendToServer);
        NativeForgeClientHooks.install(context, IrisClientHud.binding(), IrisClient::onWorldJoin, IrisClient::onDisconnect);
    }
    private static void sendToServer(byte[] frame) {
        NativeProtocolChannel channel = ForgeProtocolNetworking.channel();
        if (channel == null) {
            return;
        }
        channel.sendToServer(frame);
    }
 }
@@ -0,0 +1,100 @@
 package art.arcane.volmlib.nativelib.minecraft26_2.forge;
 import art.arcane.volmlib.nativelib.minecraft26_2.terrain.NativeRegistryDefinitions;
 import art.arcane.volmlib.nativelib.modded.NativeLoaderOptions;
 import com.google.gson.JsonParser;
 import com.mojang.serialization.JsonOps;
 import com.mojang.serialization.Lifecycle;
 import com.mojang.serialization.MapCodec;
 import net.minecraft.SharedConstants;
 import net.minecraft.core.Holder;
 import net.minecraft.core.MappedRegistry;
 import net.minecraft.core.RegistrationInfo;
 import net.minecraft.core.RegistryAccess;
 import net.minecraft.core.registries.Registries;
 import net.minecraft.resources.ResourceLocation;
 import net.minecraft.resources.RegistryOps;
 import net.minecraft.resources.ResourceKey;
 import net.minecraft.server.Bootstrap;
 import net.minecraft.world.entity.EntityType;
 import net.minecraft.world.entity.MobCategory;
 import net.minecraft.world.level.biome.Biome;
 import net.minecraft.world.level.biome.MobSpawnSettings;
 import net.minecraft.world.level.levelgen.GenerationStep;
 import net.minecraft.world.level.levelgen.carver.ConfiguredWorldCarver;
 import net.minecraft.world.level.levelgen.feature.ConfiguredFeature;
 import net.minecraft.world.level.levelgen.placement.PlacedFeature;
 import net.minecraftforge.common.world.BiomeModifier;
 import net.minecraftforge.common.world.ModifiableBiomeInfo;
 import org.junit.BeforeClass;
 import org.junit.Test;
 import java.util.List;
 import java.util.function.BooleanSupplier;
 import static org.junit.Assert.assertEquals;
 import static org.junit.Assert.assertTrue;
 import static org.mockito.Mockito.mock;
 public class NativeForgeBiomeDefinitionTest {
    private static final String BIOME_REGISTRY = "minecraft:worldgen/biome";
    private static final String BIOME_KEY = "iris:biomes/forge_modified";
    private static final String SOURCE_JSON = "{\"has_precipitation\":true,\"temperature\":0.8,\"downfall\":0.4,"
            + "\"effects\":{\"fog_color\":12638463,\"water_color\":4159204,\"water_fog_color\":329011,\"sky_color\":7907327},"
            + "\"carvers\":{},\"features\":[],\"spawners\":{},\"spawn_costs\":{}}";
    @BeforeClass
    public static void bootstrap() {
        SharedConstants.tryDetectVersion();
        Bootstrap.bootStrap();
    }
    @Test
    public void generatedBiomeDefinitionExcludesForgeBiomeModifierOutput() {
        MappedRegistry<PlacedFeature> features = new MappedRegistry<>(Registries.PLACED_FEATURE, Lifecycle.stable());
        Holder.Reference<PlacedFeature> ore = features.register(
                ResourceKey.create(Registries.PLACED_FEATURE, ResourceLocation.parse("iris:modded_ore")),
                new PlacedFeature(Holder.direct(mock(ConfiguredFeature.class)), List.of()),
                RegistrationInfo.BUILT_IN);
        features.freeze();
        MappedRegistry<ConfiguredWorldCarver<?>> carvers = new MappedRegistry<>(Registries.CONFIGURED_CARVER, Lifecycle.stable());
        carvers.freeze();
        MappedRegistry<Biome> biomes = new MappedRegistry<>(Registries.BIOME, Lifecycle.stable());
        RegistryAccess access = new RegistryAccess.ImmutableRegistryAccess(List.of(biomes, features, carvers));
        Biome source = Biome.DIRECT_CODEC.parse(RegistryOps.create(JsonOps.INSTANCE, access),
                JsonParser.parseString(SOURCE_JSON)).getOrThrow();
        Holder.Reference<Biome> biome = biomes.register(
                ResourceKey.create(Registries.BIOME, ResourceLocation.parse(BIOME_KEY)), source, RegistrationInfo.BUILT_IN);
        biomes.freeze();
        biome.value().modifiableBiomeInfo().applyBiomeModifiers(biome, List.of(new ModdedContent(ore)));
        NativeRegistryDefinitions definitions = new NativeRegistryDefinitions(() -> access,
                new NativeForgeLoader(new NativeLoaderOptions("irisworldgen", "treefeller",
                        BooleanSupplier::getAsBoolean))::unmodifiedBiome);
        assertEquals(0.1F, biome.value().getBaseTemperature(), 0.0F);
        assertEquals(0x102030, biome.value().getWaterColor() & 0xFFFFFF);
        assertTrue(biome.value().getGenerationSettings().hasFeature(ore.value()));
        assertTrue(biome.value().getMobSettings().getMobs(MobCategory.MONSTER).unwrap().stream()
                .anyMatch(spawn -> spawn.type == EntityType.ZOMBIE));
        assertEquals(JsonParser.parseString(definitions.canonicalDefinition(BIOME_REGISTRY, BIOME_KEY, SOURCE_JSON).value()),
                JsonParser.parseString(definitions.generatedDefinition(BIOME_REGISTRY, BIOME_KEY).value()));
    }
    private record ModdedContent(Holder<PlacedFeature> ore) implements BiomeModifier {
        @Override
        public void modify(Holder<Biome> biome, Phase phase, ModifiableBiomeInfo.BiomeInfo.Builder builder) {
            if (phase != Phase.ADD) {
                return;
            }
            builder.getClimateSettings().setTemperature(0.1F);
            builder.getSpecialEffects().waterColor(0x102030);
            builder.getMobSpawnSettings().addSpawn(MobCategory.MONSTER, new MobSpawnSettings.SpawnerData(EntityType.ZOMBIE, 5, 1, 2));
            builder.getGenerationSettings().addFeature(GenerationStep.Decoration.UNDERGROUND_ORES, ore);
        }
        @Override
        public MapCodec<? extends BiomeModifier> codec() {
            throw new UnsupportedOperationException();
        }
    }
 }
@@ -0,0 +1,54 @@
 package art.arcane.volmlib.nativelib.minecraft26_2.forge;
 import art.arcane.volmlib.nativelib.modded.NativeLoaderOptions;
 import net.minecraft.SharedConstants;
 import net.minecraft.server.Bootstrap;
 import net.minecraft.world.entity.MobSpawnType;
 import net.minecraft.world.entity.Mob;
 import net.minecraft.world.level.ServerLevelAccessor;
 import net.minecraftforge.common.MinecraftForge;
 import net.minecraftforge.event.entity.living.MobSpawnEvent;
 import net.minecraftforge.eventbus.api.Event;
 import org.junit.BeforeClass;
 import org.junit.Test;
 import java.util.concurrent.atomic.AtomicReference;
 import java.util.function.BooleanSupplier;
 import java.util.function.Consumer;
 import static org.junit.Assert.assertEquals;
 import static org.junit.Assert.assertFalse;
 import static org.junit.Assert.assertTrue;
 import static org.mockito.Mockito.mock;
 import static org.mockito.Mockito.when;
 public class NativeForgeSpawnPositionTest {
    @BeforeClass
    public static void bootstrap() {
        SharedConstants.tryDetectVersion();
        Bootstrap.bootStrap();
    }
    @Test
    public void chunkGenerationSpawnsFireThePositionCheckEventAndHonorItsDenial() {
        NativeForgeLoader loader = new NativeForgeLoader(
                new NativeLoaderOptions("irisworldgen", "treefeller", BooleanSupplier::getAsBoolean));
        ServerLevelAccessor level = mock(ServerLevelAccessor.class);
        Mob mob = mock(Mob.class);
        when(mob.checkSpawnRules(level, MobSpawnType.CHUNK_GENERATION)).thenReturn(true);
        when(mob.checkSpawnObstruction(level)).thenReturn(true);
        AtomicReference<MobSpawnType> observed = new AtomicReference<>();
        Consumer<MobSpawnEvent.PositionCheck> listener = event -> {
            observed.set(event.getSpawnType());
            event.setResult(Event.Result.DENY);
        };
        MinecraftForge.EVENT_BUS.addListener(listener);
        try {
            assertFalse(loader.checkSpawnPosition(mob, level, MobSpawnType.CHUNK_GENERATION));
        } finally {
            MinecraftForge.EVENT_BUS.unregister(listener);
        }
        assertEquals(MobSpawnType.CHUNK_GENERATION, observed.get());
        assertTrue(loader.checkSpawnPosition(mob, level, MobSpawnType.CHUNK_GENERATION));
    }
 }
@@ -0,0 +1,101 @@
 package art.arcane.volmlib.nativelib.minecraft26_2.forge;
 import art.arcane.volmlib.nativelib.minecraft26_2.terrain.NativeRegistryDefinitions;
 import art.arcane.volmlib.nativelib.modded.NativeLoaderOptions;
 import com.google.gson.JsonParser;
 import com.mojang.serialization.JsonOps;
 import com.mojang.serialization.Lifecycle;
 import com.mojang.serialization.MapCodec;
 import net.minecraft.SharedConstants;
 import net.minecraft.core.Holder;
 import net.minecraft.core.MappedRegistry;
 import net.minecraft.core.RegistrationInfo;
 import net.minecraft.core.RegistryAccess;
 import net.minecraft.core.registries.Registries;
 import net.minecraft.resources.Identifier;
 import net.minecraft.resources.RegistryOps;
 import net.minecraft.resources.ResourceKey;
 import net.minecraft.server.Bootstrap;
 import net.minecraft.world.entity.EntityTypes;
 import net.minecraft.world.entity.MobCategory;
 import net.minecraft.world.level.biome.Biome;
 import net.minecraft.world.level.biome.MobSpawnSettings;
 import net.minecraft.world.level.levelgen.GenerationStep;
 import net.minecraft.world.level.levelgen.carver.ConfiguredWorldCarver;
 import net.minecraft.world.level.levelgen.feature.ConfiguredFeature;
 import net.minecraft.world.level.levelgen.placement.PlacedFeature;
 import net.minecraftforge.common.world.BiomeModifier;
 import net.minecraftforge.common.world.ModifiableBiomeInfo;
 import org.junit.BeforeClass;
 import org.junit.Test;
 import java.util.List;
 import java.util.function.BooleanSupplier;
 import static org.junit.Assert.assertEquals;
 import static org.junit.Assert.assertTrue;
 import static org.mockito.Mockito.mock;
 public class NativeForgeBiomeDefinitionTest {
    private static final String BIOME_REGISTRY = "minecraft:worldgen/biome";
    private static final String BIOME_KEY = "iris:biomes/forge_modified";
    private static final String SOURCE_JSON = "{\"has_precipitation\":true,\"temperature\":0.8,\"downfall\":0.4,"
            + "\"effects\":{\"water_color\":\"#3f76e4\"},\"carvers\":[],\"features\":[],"
            + "\"spawners\":{},\"spawn_costs\":{}}";
    @BeforeClass
    public static void bootstrap() {
        SharedConstants.tryDetectVersion();
        Bootstrap.bootStrap();
    }
    @Test
    public void generatedBiomeDefinitionExcludesForgeBiomeModifierOutput() {
        MappedRegistry<PlacedFeature> features = new MappedRegistry<>(Registries.PLACED_FEATURE, Lifecycle.stable());
        Holder.Reference<PlacedFeature> ore = features.register(
                ResourceKey.create(Registries.PLACED_FEATURE, Identifier.parse("iris:modded_ore")),
                new PlacedFeature(Holder.direct(mock(ConfiguredFeature.class)), List.of()),
                RegistrationInfo.BUILT_IN);
        features.freeze();
        MappedRegistry<ConfiguredWorldCarver<?>> carvers = new MappedRegistry<>(Registries.CONFIGURED_CARVER, Lifecycle.stable());
        carvers.freeze();
        MappedRegistry<Biome> biomes = new MappedRegistry<>(Registries.BIOME, Lifecycle.stable());
        RegistryAccess access = new RegistryAccess.ImmutableRegistryAccess(List.of(biomes, features, carvers));
        Biome source = Biome.DIRECT_CODEC.parse(RegistryOps.create(JsonOps.INSTANCE, access),
                JsonParser.parseString(SOURCE_JSON)).getOrThrow();
        Holder.Reference<Biome> biome = biomes.register(
                ResourceKey.create(Registries.BIOME, Identifier.parse(BIOME_KEY)), source, RegistrationInfo.BUILT_IN);
        biomes.freeze();
        biome.value().modifiableBiomeInfo().applyBiomeModifiers(biome, List.of(new ModdedContent(ore)));
        NativeRegistryDefinitions definitions = new NativeRegistryDefinitions(() -> access,
                new NativeForgeLoader(new NativeLoaderOptions("irisworldgen", "treefeller",
                        BooleanSupplier::getAsBoolean))::unmodifiedBiome);
        assertEquals(0.1F, biome.value().modifiableBiomeInfo().get().climateSettings().temperature(), 0.0F);
        assertEquals(0x102030, biome.value().modifiableBiomeInfo().get().effects().waterColor() & 0xFFFFFF);
        assertTrue(biome.value().getGenerationSettings().hasFeature(ore.value()));
        assertTrue(biome.value().getMobSettings().getMobs(MobCategory.MONSTER).unwrap().stream()
                .anyMatch(spawn -> spawn.value().type() == EntityTypes.ZOMBIE));
        assertEquals(JsonParser.parseString(definitions.canonicalDefinition(BIOME_REGISTRY, BIOME_KEY, SOURCE_JSON).value()),
                JsonParser.parseString(definitions.generatedDefinition(BIOME_REGISTRY, BIOME_KEY).value()));
    }
    private record ModdedContent(Holder<PlacedFeature> ore) implements BiomeModifier {
        @Override
        public void modify(Holder<Biome> biome, Phase phase, ModifiableBiomeInfo.BiomeInfo.Builder builder) {
            if (phase != Phase.ADD) {
                return;
            }
            builder.getClimateSettings().setTemperature(0.1F);
            builder.getSpecialEffects().waterColor(0x102030);
            builder.getMobSpawnSettings().addSpawn(MobCategory.MONSTER, 5,
                    new MobSpawnSettings.SpawnerData(EntityTypes.ZOMBIE, 1, 2));
            builder.getGenerationSettings().addFeature(GenerationStep.Decoration.UNDERGROUND_ORES, ore);
        }
        @Override
        public MapCodec<? extends BiomeModifier> codec() {
            throw new UnsupportedOperationException();
        }
    }
 }
@@ -57,6 +57,8 @@ import art.arcane.volmlib.nativelib.minecraft26_2.modded.NativeModdedChunkGenera
 import art.arcane.volmlib.nativelib.minecraft26_2.modded.NativeGeneratorContext;
 import art.arcane.volmlib.nativelib.terrain.NativeWorld;
 import art.arcane.volmlib.util.mantle.runtime.Mantle;
 import art.arcane.volmlib.util.matter.Matter;
 import art.arcane.volmlib.nativelib.minecraft26_2.modded.NativeModdedStructureStage;
 import art.arcane.iris.world.safeguard.GenerationRefusalNotice;
@@ -100,6 +102,7 @@ import java.util.Collection;
 import java.util.LinkedHashSet;
 import java.util.List;
 import java.util.Objects;
 import java.util.OptionalLong;
 import java.util.Set;
 import java.util.TreeSet;
 import java.util.concurrent.TimeUnit;
@@ -477,6 +480,7 @@ public final class IrisModdedChunkGenerator implements NativeGeneratorOwner, Nat
                return existing;
            }
            try {
                applyReplacementSeed(level);
                Engine created = ModdedWorldEngines.get(
                        level,
                        activePack,
@@ -511,6 +515,16 @@ public final class IrisModdedChunkGenerator implements NativeGeneratorOwner, Nat
        }
    }
    private void applyReplacementSeed(NativeWorld level) {
        if (seedOverride != Long.MIN_VALUE) {
            return;
        }
        OptionalLong replacementSeed = ModdedDimensionReplacements.loadedSeed(level.name());
        if (replacementSeed.isPresent()) {
            seedOverride = replacementSeed.getAsLong();
        }
    }
    private void recordBindFailure(NativeWorld level, Throwable error) {
        // A runtime that is stopping says nothing about the world: fail this call, let the next bind try again.
        if (GenerationFailures.isShutdownFailure(error)) {
@@ -743,14 +757,8 @@ public final class IrisModdedChunkGenerator implements NativeGeneratorOwner, Nat
                PackValidationRegistry.requireLoadable(packRoot);
                packDirectory = packRoot.toFile();
            }
-            IrisData data = IrisData.get(packDirectory);
+            ModdedDimensionMetadata.ConfiguredPack resolved =
-            IrisDimension dimension = data.getDimensionLoader().load(activeDimensionKey);
+                    ModdedDimensionMetadata.ConfiguredPack.load(packDirectory, activeDimensionKey);
            if (dimension == null) {
                throw new IllegalStateException("Iris dimension '" + activeDimensionKey
                        + "' missing from pack " + packDirectory.getAbsolutePath());
            }
            ModdedDimensionMetadata.ConfiguredPack resolved = new ModdedDimensionMetadata.ConfiguredPack(
                    data, dimension, ModdedDimensionMetadata.dimensionMetadata(dimension));
            configuredPack = resolved;
            heightMetadata = resolved.metadata();
            return resolved;
@@ -823,12 +831,12 @@ public final class IrisModdedChunkGenerator implements NativeGeneratorOwner, Nat
        importedFeatures.invalidate();
    }
-    public void updateRegeneratedChunk(int chunkX, int chunkZ) {
+    public void updateRegeneratedChunk(Mantle<Matter> mantle, int chunkX, int chunkZ) {
        ModdedChunkUpdateService service = ModdedEngineBootstrap.services().service(ModdedChunkUpdateService.class);
        if (service == null) {
            throw new IllegalStateException("Iris chunk update service is unavailable during regeneration");
        }
-        service.updateRegeneratedChunk(engine(), boundLevel(), chunkX, chunkZ);
+        service.updateRegeneratedChunk(engine(), boundLevel(), mantle, chunkX, chunkZ);
    }
    public NativeBiomeResolver regenBiomeResolver() {
@@ -239,50 +239,21 @@ public final class MainWorldService {
    private static Path quarantineVanillaDimensions(Path worldRoot) throws IOException {
        Path recovery = markerFile().getParent().resolve("mainworld-recovery-" + UUID.randomUUID());
-        List<Path> moved = new ArrayList<>();
+        List<Path> sources = new ArrayList<>();
        for (String file : NativeServerWorldLayout.metadataFiles()) {
-            moveToRecovery(worldRoot, worldRoot.resolve(file), recovery, moved);
+            sources.add(worldRoot.resolve(file));
        }
        for (String folder : NativeServerWorldLayout.primaryFolders()) {
-            moveToRecovery(worldRoot, worldRoot.resolve(folder), recovery, moved);
+            sources.add(worldRoot.resolve(folder));
        }
-        moveToRecovery(worldRoot, worldRoot.resolve(IrisEngineMantle.STORAGE_FOLDER_NAME), recovery, moved);
+        sources.add(worldRoot.resolve(IrisEngineMantle.STORAGE_FOLDER_NAME));
        for (String folder : NativeServerWorldLayout.dimensionFolders()) {
-            moveToRecovery(worldRoot, worldRoot.resolve(folder), recovery, moved);
+            sources.add(worldRoot.resolve(folder));
        }
        if (moved.isEmpty()) {
            Files.deleteIfExists(recovery);
        }
        ModdedWorldQuarantine.move(worldRoot, sources, recovery);
        return recovery;
    }
    private static void moveToRecovery(Path worldRoot, Path source, Path recovery,
                                       List<Path> moved) throws IOException {
        if (!Files.exists(source)) {
            return;
        }
        Path relative = worldRoot.relativize(source);
        Path target = recovery.resolve(relative);
        Files.createDirectories(target.getParent());
        try {
            Files.move(source, target);
            moved.add(relative);
        } catch (IOException failure) {
            for (int index = moved.size() - 1; index >= 0; index--) {
                Path rollbackRelative = moved.get(index);
                Path rollbackSource = recovery.resolve(rollbackRelative);
                Path rollbackTarget = worldRoot.resolve(rollbackRelative);
                try {
                    Files.createDirectories(rollbackTarget.getParent());
                    Files.move(rollbackSource, rollbackTarget);
                } catch (IOException rollbackFailure) {
                    failure.addSuppressed(rollbackFailure);
                }
            }
            throw failure;
        }
    }
    private static String escape(String value) {
        return value.replace(":", "\\:");
    }
@@ -0,0 +1,38 @@
 /*
 * Iris is a World Generator for Minecraft Servers
 * Copyright (c) 2026 Arcane Arts (Volmit Software)
 *
 * This program is free software: you can redistribute it and/or modify
 * it under the terms of the GNU General Public License as published by
 * the Free Software Foundation, either version 3 of the License, or
 * (at your option) any later version.
 *
 * This program is distributed in the hope that it will be useful,
 * but WITHOUT ANY WARRANTY; without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
 * GNU General Public License for more details.
 *
 * You should have received a copy of the GNU General Public License
 * along with this program.  If not, see <https://www.gnu.org/licenses/>.
 */
 package art.arcane.iris.modded;
 public final class MissingPackDimensionException extends IllegalStateException {
    private final String pack;
    private final String dimensionKey;
    public MissingPackDimensionException(String pack, String dimensionKey) {
        super("Pack '" + pack + "' does not contain dimensions/" + dimensionKey + ".json");
        this.pack = pack;
        this.dimensionKey = dimensionKey;
    }
    public String pack() {
        return pack;
    }
    public String dimensionKey() {
        return dimensionKey;
    }
 }
@@ -42,6 +42,7 @@ import art.arcane.iris.generation.biome.IrisBiome;
 import art.arcane.iris.generation.biome.IrisBiomeCustom;
 import art.arcane.iris.generation.terrain.IrisDimension;
 import art.arcane.iris.generation.context.IrisContext;
 import art.arcane.iris.generation.locator.BiomeSearchFilter;
 import art.arcane.volmlib.util.math.RNG;
 import java.io.IOException;
@@ -300,10 +301,6 @@ final class ModdedBiomePolicy<H, S> implements NativeModdedBiomePolicy<H, S> {
            if (!isReady(engine)) {
                throw new IllegalStateException("Iris visible biome search has no active engine runtime");
            }
            DimensionStackContext stackContext = engine.getDimensionStackContext();
            if (stackContext == null) {
                return query.defaultFallback().get();
            }
            Set<H> candidates = new HashSet<>();
            for (H biome : collectVisibleBiomeHolders()) {
                if (query.allowed().test(biome)) {
@@ -313,16 +310,86 @@ final class ModdedBiomePolicy<H, S> implements NativeModdedBiomePolicy<H, S> {
            if (candidates.isEmpty()) {
                return null;
            }
            DimensionStackContext stackContext = engine.getDimensionStackContext();
            if (stackContext != null) {
                return query.search().search(candidates, (blockX, blockZ) -> {
                    int quartX = blockX >> 2;
                    int quartZ = blockZ >> 2;
                    DimensionStackLayout stackLayout = stackContext.sample(quartX << 2, quartZ << 2);
                    return blockY -> resolveVisibleBiome(engine, quartX, blockY >> 2, quartZ,
                            query.sampler(), stackLayout);
                });
            }
            BiomeSearchFilter filter = BiomeSearchFilter.of(engine, searchBiomeKeys(engine, candidates));
            int minHeight = engine.getMinHeight();
            return query.search().search(candidates, (blockX, blockZ) -> {
                int quartX = blockX >> 2;
                int quartZ = blockZ >> 2;
-                DimensionStackLayout stackLayout = stackContext.sample(quartX << 2, quartZ << 2);
+                BiomeSearchFilter.Column column = filter.column(quartX << 2, quartZ << 2);
-                return blockY -> resolveVisibleBiome(engine, quartX, blockY >> 2, quartZ,
+                return blockY -> column.admits(((blockY >> 2) << 2) - minHeight)
-                        query.sampler(), stackLayout);
+                        ? locateVisibleBiome(engine, quartX, blockY >> 2, quartZ, query.sampler())
                        : null;
            });
        }
    }
    private H locateVisibleBiome(Engine engine, int quartX, int quartY, int quartZ, S sampler) {
        try (GenerationHistoryRuntimeRouter.CoordinateScope ignored = openHistoryCoordinateScope(
                engine, quartX << 2, quartZ << 2, "modded_locate_visible_biome")) {
            return resolveVisibleBiome(engine, quartX, quartY, quartZ, sampler, null);
        }
    }
    private Set<String> searchBiomeKeys(Engine engine, Set<H> candidates) {
        NativeBiomeSourceAccess.RegistryView<H> registry = biomeRegistry();
        if (registry == null) {
            throw new IllegalStateException("Iris visible biome search has no biome registry");
        }
        H plains = resolveHolder(registry, "minecraft:plains");
        boolean fallbackCandidate = plains != null && candidates.contains(plains);
        Set<String> keys = new HashSet<>();
        for (OwnedBiome ownedBiome : getOwnedBiomes(engine)) {
            if (emitsCandidate(engine, ownedBiome, registry, candidates, fallbackCandidate)) {
                keys.add(ownedBiome.biome().getLoadKey());
            }
        }
        return keys;
    }
    private boolean emitsCandidate(Engine engine, OwnedBiome ownedBiome, NativeBiomeSourceAccess.RegistryView<H> registry,
                                   Set<H> candidates, boolean fallbackCandidate) {
        IrisBiome irisBiome = ownedBiome.biome();
        if (irisBiome.isCustom()) {
            for (IrisBiomeCustom customBiome : irisBiome.getCustomDerivitives()) {
                if (customBiome == null) {
                    if (fallbackCandidate) {
                        return true;
                    }
                    continue;
                }
                String key = ownedBiome.dimension() == engine.getDimension() && ownedBiome.data() == engine.getData()
                        ? ModdedWorldgenIds.biomeRef(engine, customBiome.getId())
                        : ownedBiome.data().customBiomeResourceKey(ownedBiome.dimension(), customBiome);
                if (emits(registry, key, candidates, fallbackCandidate)) {
                    return true;
                }
            }
            return false;
        }
        for (String key : irisBiome.getVisibleBiomeKeys(engine)) {
            if (emits(registry, key, candidates, fallbackCandidate)) {
                return true;
            }
        }
        return false;
    }
    private static <H> boolean emits(NativeBiomeSourceAccess.RegistryView<H> registry, String key,
                                     Set<H> candidates, boolean fallbackCandidate) {
        H holder = key == null ? null : resolveHolder(registry, key);
        return holder == null ? fallbackCandidate : candidates.contains(holder);
    }
    private H getNoiseBiome(Engine engine, int quartX, int quartY, int quartZ,
                                        S sampler) {
        if (isGuaranteedSurfaceBiome(engine, quartY)) {
@@ -0,0 +1,92 @@
 /*
 * Iris is a World Generator for Minecraft Servers
 * Copyright (c) 2026 Arcane Arts (Volmit Software)
 *
 * This program is free software: you can redistribute it and/or modify
 * it under the terms of the GNU General Public License as published by
 * the Free Software Foundation, either version 3 of the License, or
 * (at your option) any later version.
 *
 * This program is distributed in the hope that it will be useful,
 * but WITHOUT ANY WARRANTY; without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
 * GNU General Public License for more details.
 *
 * You should have received a copy of the GNU General Public License
 * along with this program.  If not, see <https://www.gnu.org/licenses/>.
 */
 package art.arcane.iris.modded;
 import art.arcane.volmlib.util.json.JSONArray;
 import art.arcane.volmlib.util.json.JSONObject;
 import java.io.IOException;
 import java.nio.charset.StandardCharsets;
 import java.nio.file.Files;
 import java.nio.file.Path;
 import java.util.LinkedHashMap;
 import java.util.Map;
 final class ModdedDatapackTagMerge {
    private static final String REPLACE = "replace";
    private static final String VALUES = "values";
    private static final String REMOVE = "remove";
    private ModdedDatapackTagMerge() {
    }
    static boolean isTag(Path relative) {
        return relative.getNameCount() >= 4
                && "data".equals(relative.getName(0).toString())
                && "tags".equals(relative.getName(2).toString())
                && relative.getFileName().toString().endsWith(".json");
    }
    static void merge(Path source, Path destination) throws IOException {
        JSONObject incoming = read(source);
        JSONObject existing = read(destination);
        JSONObject tag = new JSONObject();
        tag.put(REPLACE, existing.optBoolean(REPLACE, false) || incoming.optBoolean(REPLACE, false));
        tag.put(VALUES, union(existing, incoming, VALUES, source, destination));
        if (existing.has(REMOVE) || incoming.has(REMOVE)) {
            tag.put(REMOVE, union(existing, incoming, REMOVE, source, destination));
        }
        Files.writeString(destination, tag.toString(4), StandardCharsets.UTF_8);
    }
    private static JSONArray union(JSONObject existing, JSONObject incoming, String field, Path source, Path destination)
            throws IOException {
        Map<String, Object> entries = new LinkedHashMap<>();
        collect(existing, field, entries, destination);
        collect(incoming, field, entries, source);
        JSONArray merged = new JSONArray();
        for (Object entry : entries.values()) {
            merged.put(entry);
        }
        return merged;
    }
    private static JSONObject read(Path tag) throws IOException {
        try {
            return new JSONObject(Files.readString(tag, StandardCharsets.UTF_8));
        } catch (RuntimeException invalid) {
            throw new IOException("Iris cannot merge the invalid datapack tag " + tag + ".", invalid);
        }
    }
    private static void collect(JSONObject tag, String field, Map<String, Object> entries, Path origin) throws IOException {
        JSONArray values = tag.optJSONArray(field);
        if (values == null) {
            return;
        }
        for (int index = 0; index < values.length(); index++) {
            Object entry = values.get(index);
            String key = entry instanceof JSONObject object ? object.optString("id", "") : entry.toString();
            if (key.isBlank()) {
                throw new IOException("Iris cannot merge datapack tag " + origin + ": " + field + " entry " + index + " has no id.");
            }
            entries.putIfAbsent(key, entry);
        }
    }
 }
@@ -0,0 +1,148 @@
 /*
 * Iris is a World Generator for Minecraft Servers
 * Copyright (c) 2026 Arcane Arts (Volmit Software)
 *
 * This program is free software: you can redistribute it and/or modify
 * it under the terms of the GNU General Public License as published by
 * the Free Software Foundation, either version 3 of the License, or
 * (at your option) any later version.
 *
 * This program is distributed in the hope that it will be useful,
 * but WITHOUT ANY WARRANTY; without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
 * GNU General Public License for more details.
 *
 * You should have received a copy of the GNU General Public License
 * along with this program.  If not, see <https://www.gnu.org/licenses/>.
 */
 package art.arcane.iris.modded;
 import art.arcane.iris.generation.runtime.Engine;
 import art.arcane.iris.modded.command.ModdedPackCommands;
 import art.arcane.iris.pack.loading.IrisData;
 import art.arcane.volmlib.nativelib.minecraft26_2.modded.NativeModdedServer;
 import java.io.File;
 import java.util.ArrayList;
 import java.util.List;
 import java.util.Map;
 import java.util.concurrent.CompletableFuture;
 import java.util.concurrent.ConcurrentHashMap;
 public final class ModdedDimensionCreations {
    private static final Map<String, ModdedDimensionInjection.Async<?, ?, ?>> ACTIVE = new ConcurrentHashMap<>();
    private ModdedDimensionCreations() {
    }
    public static CompletableFuture<Void> create(
            NativeModdedServer server,
            String dimensionId,
            String pack,
            String packDimensionKey,
            long seed
    ) {
        if (ModdedDimensionRegistryStore.get(server, dimensionId) != null) {
            return CompletableFuture.failedFuture(new IllegalStateException(
                    ModdedDimensionManager.alreadyExists(dimensionId)));
        }
        ModdedDimensionRegistryStore.PersistentDimension dimension =
                new ModdedDimensionRegistryStore.PersistentDimension(dimensionId, pack, packDimensionKey, seed);
        ModdedDimensionInjection.Async<ModdedWorldEngines.PreparedPack, ModdedDimensionManager.PendingInjection, Engine> creation =
                ModdedDimensionInjection.async(dimension, new CreationSteps(server), server::execute);
        if (ACTIVE.putIfAbsent(dimensionId, creation) != null) {
            return CompletableFuture.failedFuture(new IllegalStateException(beingCreated(dimensionId)));
        }
        CompletableFuture<Void> created = creation.result().handle(
                (ModdedDimensionInjection.Result result, Throwable failure) -> settle(creation, dimension, result));
        creation.start();
        return created;
    }
    public static boolean isCreating(String dimensionId) {
        return ACTIVE.containsKey(dimensionId);
    }
    public static void requireNotCreating(String dimensionId) {
        if (isCreating(dimensionId)) {
            throw new IllegalStateException(beingCreated(dimensionId));
        }
    }
    public static void cancelAll() {
        List<ModdedDimensionInjection.Async<?, ?, ?>> active = new ArrayList<>(ACTIVE.values());
        for (ModdedDimensionInjection.Async<?, ?, ?> creation : active) {
            creation.cancel();
        }
    }
    private static Void settle(
            ModdedDimensionInjection.Async<?, ?, ?> creation,
            ModdedDimensionRegistryStore.PersistentDimension dimension,
            ModdedDimensionInjection.Result result
    ) {
        ACTIVE.remove(dimension.id(), creation);
        Throwable cause = result == null
                ? new IllegalStateException("Iris dimension creation for '" + dimension.id() + "' ended without a result")
                : result.failure();
        if (cause instanceof Error fatal) {
            throw fatal;
        }
        if (cause != null) {
            throw cause instanceof RuntimeException runtimeException ? runtimeException : new IllegalStateException(cause);
        }
        ModdedIrisLog.info("Iris created runtime dimension '{}' (pack={} dim={}): prepared {}ms, engine {}ms",
                dimension.id(), dimension.pack(), dimension.dimension(), result.preparedMillis(), result.builtMillis());
        return null;
    }
    private static String beingCreated(String dimensionId) {
        return "Iris dimension '" + dimensionId + "' is still being created. Try again when it is live.";
    }
    private record CreationSteps(NativeModdedServer server)
            implements ModdedDimensionInjection.Steps<ModdedWorldEngines.PreparedPack, ModdedDimensionManager.PendingInjection, Engine> {
        @Override
        public ModdedWorldEngines.PreparedPack prepare(ModdedDimensionRegistryStore.PersistentDimension dimension) {
            ModdedStartup.requirePackForWorldCreation(dimension.pack());
            IrisData data = IrisData.get(new File(ModdedPackCommands.packsRoot(), dimension.pack()));
            if (data.getDimensionLoader().load(dimension.dimension()) == null) {
                throw new MissingPackDimensionException(dimension.pack(), dimension.dimension());
            }
            return ModdedWorldEngines.prepareCreated(server, dimension);
        }
        @Override
        public ModdedDimensionManager.PendingInjection begin(
                ModdedDimensionRegistryStore.PersistentDimension dimension,
                ModdedWorldEngines.PreparedPack prepared
        ) {
            return ModdedDimensionManager.beginCreation(server, dimension, prepared.active());
        }
        @Override
        public Engine build(ModdedDimensionManager.PendingInjection level, ModdedWorldEngines.PreparedPack prepared) {
            if (level.present()) {
                prepared.close();
                return null;
            }
            return ModdedWorldEngines.createPrepared(level.handle().level(), level.handle().seed(), prepared);
        }
        @Override
        public void complete(ModdedDimensionManager.PendingInjection level, Engine engine) {
            ModdedDimensionManager.completeCreation(server, level, engine);
        }
        @Override
        public void abandon(ModdedDimensionManager.PendingInjection level, Engine engine, Throwable failure) {
            ModdedDimensionManager.abandonCreation(server, level, engine, failure);
        }
        @Override
        public void discard(ModdedWorldEngines.PreparedPack prepared) {
            prepared.close();
        }
    }
 }
@@ -0,0 +1,434 @@
 /*
 * Iris is a World Generator for Minecraft Servers
 * Copyright (c) 2026 Arcane Arts (Volmit Software)
 *
 * This program is free software: you can redistribute it and/or modify
 * it under the terms of the GNU General Public License as published by
 * the Free Software Foundation, either version 3 of the License, or
 * (at your option) any later version.
 *
 * This program is distributed in the hope that it will be useful,
 * but WITHOUT ANY WARRANTY; without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
 * GNU General Public License for more details.
 *
 * You should have received a copy of the GNU General Public License
 * along with this program.  If not, see <https://www.gnu.org/licenses/>.
 */
 package art.arcane.iris.modded;
 import java.util.ArrayList;
 import java.util.List;
 import java.util.Objects;
 import java.util.concurrent.CancellationException;
 import java.util.concurrent.CompletableFuture;
 import java.util.concurrent.CompletionException;
 import java.util.concurrent.ExecutionException;
 import java.util.concurrent.Executor;
 import java.util.concurrent.ExecutorService;
 import java.util.concurrent.Executors;
 import java.util.concurrent.TimeUnit;
 import java.util.concurrent.TimeoutException;
 import java.util.concurrent.atomic.AtomicBoolean;
 final class ModdedDimensionInjection<P, L, E> implements AutoCloseable {
    private static final int MINIMUM_WORKERS = 2;
    private static final long CANCEL_BUILD_WAIT_SECONDS = 120L;
    private final List<Preparation<P>> preparations;
    private final Steps<P, L, E> steps;
    private final ExecutorService workers;
    private final AtomicBoolean finished = new AtomicBoolean();
    private ModdedDimensionInjection(List<Preparation<P>> preparations, Steps<P, L, E> steps, ExecutorService workers) {
        this.preparations = preparations;
        this.steps = steps;
        this.workers = workers;
    }
    static <P, L, E> ModdedDimensionInjection<P, L, E> start(
            List<ModdedDimensionRegistryStore.PersistentDimension> dimensions,
            Steps<P, L, E> steps
    ) {
        Steps<P, L, E> requiredSteps = Objects.requireNonNull(steps, "steps");
        ExecutorService workers = Executors.newFixedThreadPool(workerCount(dimensions.size()),
                Thread.ofPlatform().name("Iris Dimension Restore ", 1L).daemon(true).factory());
        List<Preparation<P>> preparations = new ArrayList<>(dimensions.size());
        for (ModdedDimensionRegistryStore.PersistentDimension dimension : dimensions) {
            preparations.add(new Preparation<>(dimension, CompletableFuture.supplyAsync(
                    () -> timed(() -> requiredSteps.prepare(dimension)), workers)));
        }
        return new ModdedDimensionInjection<>(List.copyOf(preparations), requiredSteps, workers);
    }
    static <P, L, E> Async<P, L, E> async(
            ModdedDimensionRegistryStore.PersistentDimension dimension,
            Steps<P, L, E> steps,
            Executor serverThread
    ) {
        return new Async<>(dimension, steps, serverThread);
    }
    void awaitPreparations() {
        List<CompletableFuture<Timed<P>>> futures = new ArrayList<>(preparations.size());
        for (Preparation<P> preparation : preparations) {
            futures.add(preparation.future());
        }
        CompletableFuture.allOf(futures.toArray(CompletableFuture[]::new))
                .handle((Void ignored, Throwable failure) -> null)
                .join();
    }
    List<Result> finish() {
        if (!finished.compareAndSet(false, true)) {
            throw new IllegalStateException("Iris dimension injection already finished");
        }
        try {
            List<Building<L, E>> building = new ArrayList<>(preparations.size());
            Result[] results = new Result[preparations.size()];
            for (int index = 0; index < preparations.size(); index++) {
                Preparation<P> preparation = preparations.get(index);
                Timed<P> prepared;
                try {
                    prepared = join(preparation.future());
                } catch (Throwable failure) {
                    results[index] = new Result(preparation.dimension(), failure, 0L, 0L);
                    continue;
                }
                L level;
                try {
                    level = steps.begin(preparation.dimension(), prepared.value());
                } catch (Throwable failure) {
                    discard(steps, prepared.value(), failure);
                    results[index] = new Result(preparation.dimension(), failure, prepared.millis(), 0L);
                    continue;
                }
                CompletableFuture<Timed<E>> engine = CompletableFuture.supplyAsync(
                        () -> timed(() -> steps.build(level, prepared.value())), workers);
                building.add(new Building<>(index, preparation.dimension(), prepared.millis(), level, engine));
            }
            for (Building<L, E> pending : building) {
                results[pending.index()] = complete(pending);
            }
            return List.of(results);
        } finally {
            workers.shutdown();
        }
    }
    @Override
    public void close() {
        if (finished.compareAndSet(false, true)) {
            for (Preparation<P> preparation : preparations) {
                preparation.future().whenComplete((Timed<P> prepared, Throwable failure) -> {
                    if (prepared != null) {
                        discard(steps, prepared.value(), null);
                    }
                });
            }
        }
        workers.shutdown();
    }
    private Result complete(Building<L, E> pending) {
        Timed<E> engine;
        try {
            engine = join(pending.engine());
        } catch (Throwable failure) {
            abandon(steps, pending.level(), null, failure);
            return new Result(pending.dimension(), failure, pending.preparedMillis(), 0L);
        }
        try {
            steps.complete(pending.level(), engine.value());
            return new Result(pending.dimension(), null, pending.preparedMillis(), engine.millis());
        } catch (Throwable failure) {
            return new Result(pending.dimension(), failure, pending.preparedMillis(), engine.millis());
        }
    }
    private static <P, L, E> void abandon(Steps<P, L, E> steps, L level, E engine, Throwable failure) {
        try {
            steps.abandon(level, engine, failure);
        } catch (Throwable cleanupFailure) {
            failure.addSuppressed(cleanupFailure);
        }
    }
    private static <P, L, E> void discard(Steps<P, L, E> steps, P prepared, Throwable failure) {
        try {
            steps.discard(prepared);
        } catch (Throwable cleanupFailure) {
            if (failure != null) {
                failure.addSuppressed(cleanupFailure);
                return;
            }
            ModdedIrisLog.error("Iris could not release an unused dimension preparation", cleanupFailure);
        }
    }
    private static int workerCount(int dimensions) {
        int processors = Runtime.getRuntime().availableProcessors();
        return Math.max(1, Math.min(dimensions, Math.max(MINIMUM_WORKERS, processors / 2)));
    }
    private static <T> Timed<T> timed(Step<T> step) {
        long startedAt = System.nanoTime();
        try {
            T value = step.run();
            return new Timed<>(value, (System.nanoTime() - startedAt) / 1_000_000L);
        } catch (RuntimeException | Error failure) {
            throw failure;
        } catch (Exception failure) {
            throw new CompletionException(failure);
        }
    }
    private static Throwable unwrap(Throwable failure) {
        Throwable current = failure;
        while (current instanceof CompletionException && current.getCause() != null) {
            current = current.getCause();
        }
        return current;
    }
    private static <T> T join(CompletableFuture<T> future) throws Throwable {
        try {
            return future.get();
        } catch (ExecutionException failure) {
            Throwable cause = failure.getCause();
            if (cause instanceof CompletionException wrapped && wrapped.getCause() != null) {
                throw wrapped.getCause();
            }
            throw cause == null ? failure : cause;
        } catch (InterruptedException interrupted) {
            Thread.currentThread().interrupt();
            throw new IllegalStateException("Interrupted while injecting Iris dimensions", interrupted);
        }
    }
    interface Steps<P, L, E> {
        P prepare(ModdedDimensionRegistryStore.PersistentDimension dimension) throws Exception;
        L begin(ModdedDimensionRegistryStore.PersistentDimension dimension, P prepared) throws Exception;
        E build(L level, P prepared) throws Exception;
        void complete(L level, E engine) throws Exception;
        void abandon(L level, E engine, Throwable failure);
        void discard(P prepared);
    }
    record Result(
            ModdedDimensionRegistryStore.PersistentDimension dimension,
            Throwable failure,
            long preparedMillis,
            long builtMillis
    ) {
    }
    static final class Async<P, L, E> {
        private final ModdedDimensionRegistryStore.PersistentDimension dimension;
        private final Steps<P, L, E> steps;
        private final Executor serverThread;
        private final ExecutorService worker;
        private final CompletableFuture<Result> result = new CompletableFuture<>();
        private State state = State.UNSTARTED;
        private Timed<P> prepared;
        private L level;
        private CompletableFuture<Timed<E>> engine;
        private Async(
                ModdedDimensionRegistryStore.PersistentDimension dimension,
                Steps<P, L, E> steps,
                Executor serverThread
        ) {
            this.dimension = Objects.requireNonNull(dimension, "dimension");
            this.steps = Objects.requireNonNull(steps, "steps");
            this.serverThread = Objects.requireNonNull(serverThread, "serverThread");
            this.worker = Executors.newSingleThreadExecutor(
                    Thread.ofPlatform().name("Iris Dimension Create " + dimension.id()).daemon(true).factory());
        }
        CompletableFuture<Result> result() {
            return result;
        }
        synchronized void start() {
            if (state != State.UNSTARTED) {
                throw new IllegalStateException("Iris dimension injection for '" + dimension.id() + "' already started");
            }
            state = State.PREPARING;
            CompletableFuture.supplyAsync(() -> timed(() -> steps.prepare(dimension)), worker)
                    .whenComplete(this::prepared);
        }
        void cancel() {
            Timed<P> unused = null;
            CompletableFuture<Timed<E>> building = null;
            L created = null;
            synchronized (this) {
                if (state == State.DONE || state == State.CANCELLED) {
                    return;
                }
                if (state == State.PREPARED) {
                    unused = prepared;
                } else if (state == State.BUILDING) {
                    building = engine;
                    created = level;
                }
                state = State.CANCELLED;
            }
            CancellationException cancellation = new CancellationException("Iris dimension injection for '"
                    + dimension.id() + "' was cancelled because the server is stopping");
            long preparedMillis = 0L;
            if (unused != null) {
                discard(steps, unused.value(), cancellation);
                preparedMillis = unused.millis();
            }
            if (building != null) {
                abandon(steps, created, awaitCancelledEngine(building, cancellation), cancellation);
            }
            done(new Result(dimension, cancellation, preparedMillis, 0L));
        }
        private void prepared(Timed<P> value, Throwable failure) {
            synchronized (this) {
                if (state == State.CANCELLED) {
                    if (value != null) {
                        discard(steps, value.value(), null);
                    }
                    worker.shutdown();
                    return;
                }
                if (failure != null) {
                    state = State.DONE;
                } else {
                    prepared = value;
                    state = State.PREPARED;
                }
            }
            if (failure != null) {
                done(new Result(dimension, unwrap(failure), 0L, 0L));
                return;
            }
            serverThread.execute(this::begin);
        }
        private void begin() {
            Timed<P> ready;
            synchronized (this) {
                if (state != State.PREPARED) {
                    return;
                }
                ready = prepared;
                state = State.BEGINNING;
            }
            L created;
            try {
                created = steps.begin(dimension, ready.value());
            } catch (Throwable failure) {
                discard(steps, ready.value(), failure);
                synchronized (this) {
                    state = State.DONE;
                }
                done(new Result(dimension, failure, ready.millis(), 0L));
                return;
            }
            CompletableFuture<Timed<E>> building;
            synchronized (this) {
                level = created;
                state = State.BUILDING;
                building = CompletableFuture.supplyAsync(() -> timed(() -> steps.build(created, ready.value())), worker);
                engine = building;
            }
            building.whenComplete((Timed<E> built, Throwable failure) -> serverThread.execute(this::complete));
        }
        private void complete() {
            CompletableFuture<Timed<E>> building;
            L created;
            long preparedMillis;
            synchronized (this) {
                if (state != State.BUILDING) {
                    return;
                }
                state = State.DONE;
                building = engine;
                created = level;
                preparedMillis = prepared.millis();
            }
            Timed<E> built;
            try {
                built = join(building);
            } catch (Throwable failure) {
                abandon(steps, created, null, failure);
                done(new Result(dimension, failure, preparedMillis, 0L));
                return;
            }
            try {
                steps.complete(created, built.value());
                done(new Result(dimension, null, preparedMillis, built.millis()));
            } catch (Throwable failure) {
                done(new Result(dimension, failure, preparedMillis, built.millis()));
            }
        }
        private E awaitCancelledEngine(CompletableFuture<Timed<E>> building, CancellationException cancellation) {
            try {
                return building.get(CANCEL_BUILD_WAIT_SECONDS, TimeUnit.SECONDS).value();
            } catch (ExecutionException failure) {
                return null;
            } catch (TimeoutException failure) {
                ModdedIrisLog.error("Iris dimension engine for '{}' did not finish within {}s of shutdown; abandoning its level",
                        dimension.id(), CANCEL_BUILD_WAIT_SECONDS);
                cancellation.addSuppressed(failure);
                return null;
            } catch (InterruptedException interrupted) {
                Thread.currentThread().interrupt();
                cancellation.addSuppressed(interrupted);
                return null;
            }
        }
        private void done(Result outcome) {
            worker.shutdown();
            result.complete(outcome);
        }
        private enum State {
            UNSTARTED,
            PREPARING,
            PREPARED,
            BEGINNING,
            BUILDING,
            DONE,
            CANCELLED
        }
    }
    @FunctionalInterface
    private interface Step<T> {
        T run() throws Exception;
    }
    private record Timed<T>(T value, long millis) {
    }
    private record Preparation<P>(
            ModdedDimensionRegistryStore.PersistentDimension dimension,
            CompletableFuture<Timed<P>> future
    ) {
    }
    private record Building<L, E>(
            int index,
            ModdedDimensionRegistryStore.PersistentDimension dimension,
            long preparedMillis,
            L level,
            CompletableFuture<Timed<E>> engine
    ) {
    }
 }
@@ -107,150 +107,172 @@ public final class ModdedDimensionManager {
    ) {
        return create(
                server,
-                dimensionId,
+                new DimensionRequest(dimensionId, pack, packDimensionKey, seed),
-                pack,
+                () -> transientStudioPack(pack, packDimensionKey)
                packDimensionKey,
                seed,
                ModdedGenerationMode.TRANSIENT_STUDIO
        );
    }
-    static Handle restorePersistent(
+    static PendingInjection beginInjection(
            NativeModdedServer server,
-            String dimensionId,
+            ModdedDimensionRegistryStore.PersistentDimension dimension,
-            String pack,
+            ModdedGenerationHistoryStorage.ActivePack active,
            String packDimensionKey,
            long seed
    ) {
        return create(
                server,
                dimensionId,
                pack,
                packDimensionKey,
                seed,
                ModdedGenerationMode.PERSISTENT_RESTORE
        );
    }
    private static Handle create(
            NativeModdedServer server,
            String dimensionId,
            String pack,
            String packDimensionKey,
            long seed,
            ModdedGenerationMode generationMode
    ) {
        NativeDimensionRuntime serverAccess = requireAccess();
        DimensionRequest requested = new DimensionRequest(dimension.id(), dimension.pack(), dimension.dimension(), dimension.seed());
        synchronized (LOCK) {
-            String key = dimensionId;
+            Handle present = presentHandle(server, serverAccess, requested);
-            RuntimePack runtimePack = switch (generationMode) {
+            if (present != null) {
-                case TRANSIENT_STUDIO -> transientStudioPack(pack, packDimensionKey);
+                return new PendingInjection(present, true);
                case PERSISTENT_CREATE -> persistentRuntimePack(
                        ModdedGenerationHistoryStorage.createOrStage(
                                server,
                                key,
                                pack,
                                packDimensionKey,
                                seed
                        ),
                        generationMode
                );
                case PERSISTENT_RESTORE -> persistentRuntimePack(
                        ModdedGenerationHistoryStorage.restoreOrAdopt(
                                server,
                                key,
                                pack,
                                packDimensionKey,
                                seed
                        ),
                        generationMode
                );
            };
            Handle existing = HANDLES.get(dimensionId);
            if (existing != null && serverAccess.hasLevel(server, key)) {
                Handle refreshed = new Handle(dimensionId, pack, packDimensionKey, seed, existing.level(), existing.generator());
                HANDLES.put(dimensionId, refreshed);
                return refreshed;
            }
            if (serverAccess.hasLevel(server, key)) {
                NativeWorld present = level(server, dimensionId);
                IrisModdedChunkGenerator generator = NativeWorldGenerators.find(present, IrisModdedChunkGenerator.class);
                if (generator == null) {
                    throw new IllegalStateException("Iris cannot inject dimension '" + dimensionId + "': a non-Iris level with that id is already loaded");
                }
                ModdedIrisLog.warn("Iris dimension '{}' is already present in the running server; reusing it", dimensionId);
                Handle handle = new Handle(dimensionId, pack, packDimensionKey, seed, present, generator);
                HANDLES.put(dimensionId, handle);
                return handle;
            }
            try {
-                Handle handle = inject(
+                RuntimePack runtimePack = persistentRuntimePack(active, generationMode);
-                        server,
+                return new PendingInjection(createLevel(server, serverAccess, requested, runtimePack), false);
                        serverAccess,
                        dimensionId,
                        key,
                        pack,
                        packDimensionKey,
                        seed,
                        runtimePack
                );
                HANDLES.put(dimensionId, handle);
                ModdedIrisLog.info("Iris injected runtime dimension '{}' (pack={} dim={} seed={})", dimensionId, pack, packDimensionKey, seed);
                return handle;
            } catch (Throwable e) {
-                ModdedIrisLog.error("Iris failed to inject runtime dimension '{}' (pack={} dim={} seed={})", dimensionId, pack, packDimensionKey, seed, e);
+                throw injectionFailure(requested, e);
                throw new IllegalStateException("Iris runtime dimension injection failed for " + dimensionId, e);
            }
        }
    }
-    public static Handle createPersistent(NativeModdedServer server, String dimensionId, String pack, String packDimensionKey, long seed) {
+    static Handle completeInjection(NativeModdedServer server, PendingInjection pending, Engine engine) {
        if (pending.present()) {
            return pending.handle();
        }
        NativeDimensionRuntime serverAccess = requireAccess();
        synchronized (LOCK) {
            ModdedDimensionRegistryStore.PersistentDimension previous =
                    ModdedDimensionRegistryStore.get(server, dimensionId);
            if (previous != null) {
                throw new IllegalStateException("Iris dimension '" + dimensionId
                        + "' already exists. Use the Iris world update command to stage a pack update.");
            }
            ModdedDimensionRegistryStore.put(server, new ModdedDimensionRegistryStore.PersistentDimension(
                    dimensionId,
                    pack,
                    packDimensionKey,
                    seed
            ));
            try {
-                return create(
+                return register(publishLevel(server, serverAccess, pending.handle(), engine));
                        server,
                        dimensionId,
                        pack,
                        packDimensionKey,
                        seed,
                        ModdedGenerationMode.PERSISTENT_CREATE
                );
            } catch (Throwable e) {
-                try {
+                throw injectionFailure(DimensionRequest.of(pending.handle()), e);
                    ModdedDimensionRegistryStore.remove(server, dimensionId);
                } catch (Throwable rollbackFailure) {
                    e.addSuppressed(rollbackFailure);
                }
                if (e instanceof RuntimeException runtimeException) {
                    throw runtimeException;
                }
                if (e instanceof Error fatalError) {
                    throw fatalError;
                }
                throw new IllegalStateException("Iris runtime dimension injection failed for " + dimensionId, e);
            }
        }
    }
    static void abandonInjection(NativeModdedServer server, PendingInjection pending, Engine engine, Throwable failure) {
        if (engine != null) {
            try {
                ModdedWorldEngines.closeUnregistered(engine);
            } catch (Throwable cleanupFailure) {
                failure.addSuppressed(cleanupFailure);
                ModdedIrisLog.error("Iris failed to close the abandoned engine for '{}'",
                        pending.handle().dimensionId(), cleanupFailure);
            }
        }
        if (pending.present()) {
            return;
        }
        NativeDimensionRuntime serverAccess = requireAccess();
        Handle handle = pending.handle();
        synchronized (LOCK) {
            rollbackInjection(server, serverAccess, handle.dimensionId(), handle.level(), handle.generator(), false, failure);
        }
    }
    static PendingInjection beginCreation(
            NativeModdedServer server,
            ModdedDimensionRegistryStore.PersistentDimension dimension,
            ModdedGenerationHistoryStorage.ActivePack active
    ) {
        synchronized (LOCK) {
            if (ModdedDimensionRegistryStore.get(server, dimension.id()) != null) {
                throw new IllegalStateException(alreadyExists(dimension.id()));
            }
            ModdedDimensionRegistryStore.put(server, dimension);
            try {
                return beginInjection(server, dimension, active, ModdedGenerationMode.PERSISTENT_CREATE);
            } catch (RuntimeException | Error failure) {
                forgetCreation(server, dimension.id(), failure);
                throw failure;
            }
        }
    }
    static Handle completeCreation(NativeModdedServer server, PendingInjection pending, Engine engine) {
        try {
            return completeInjection(server, pending, engine);
        } catch (RuntimeException | Error failure) {
            forgetCreation(server, pending.handle().dimensionId(), failure);
            throw failure;
        }
    }
    static void abandonCreation(NativeModdedServer server, PendingInjection pending, Engine engine, Throwable failure) {
        abandonInjection(server, pending, engine, failure);
        forgetCreation(server, pending.handle().dimensionId(), failure);
    }
    static String alreadyExists(String dimensionId) {
        return "Iris dimension '" + dimensionId
                + "' already exists. Use the Iris world update command to stage a pack update.";
    }
    private static void forgetCreation(NativeModdedServer server, String dimensionId, Throwable failure) {
        try {
            ModdedDimensionRegistryStore.remove(server, dimensionId);
        } catch (Throwable rollbackFailure) {
            failure.addSuppressed(rollbackFailure);
        }
    }
    private static Handle create(NativeModdedServer server, DimensionRequest requested, RuntimePackSource source) {
        NativeDimensionRuntime serverAccess = requireAccess();
        synchronized (LOCK) {
            RuntimePack runtimePack = source.open();
            Handle present = presentHandle(server, serverAccess, requested);
            if (present != null) {
                return present;
            }
            try {
                return register(publishLevel(server, serverAccess,
                        createLevel(server, serverAccess, requested, runtimePack), null));
            } catch (Throwable e) {
                throw injectionFailure(requested, e);
            }
        }
    }
    private static Handle presentHandle(NativeModdedServer server, NativeDimensionRuntime serverAccess, DimensionRequest requested) {
        String dimensionId = requested.dimensionId();
        Handle existing = HANDLES.get(dimensionId);
        if (existing != null && serverAccess.hasLevel(server, dimensionId)) {
            Handle refreshed = requested.bind(existing.level(), existing.generator());
            HANDLES.put(dimensionId, refreshed);
            return refreshed;
        }
        if (!serverAccess.hasLevel(server, dimensionId)) {
            return null;
        }
        NativeWorld present = level(server, dimensionId);
        IrisModdedChunkGenerator generator = NativeWorldGenerators.find(present, IrisModdedChunkGenerator.class);
        if (generator == null) {
            throw new IllegalStateException("Iris cannot inject dimension '" + dimensionId + "': a non-Iris level with that id is already loaded");
        }
        ModdedIrisLog.warn("Iris dimension '{}' is already present in the running server; reusing it", dimensionId);
        Handle handle = requested.bind(present, generator);
        HANDLES.put(dimensionId, handle);
        return handle;
    }
    private static Handle register(Handle handle) {
        HANDLES.put(handle.dimensionId(), handle);
        ModdedIrisLog.info("Iris injected runtime dimension '{}' (pack={} dim={} seed={})",
                handle.dimensionId(), handle.pack(), handle.packDimensionKey(), handle.seed());
        return handle;
    }
    private static IllegalStateException injectionFailure(DimensionRequest requested, Throwable failure) {
        ModdedIrisLog.error("Iris failed to inject runtime dimension '{}' (pack={} dim={} seed={})",
                requested.dimensionId(), requested.pack(), requested.packDimensionKey(), requested.seed(), failure);
        return new IllegalStateException("Iris runtime dimension injection failed for " + requested.dimensionId(), failure);
    }
    public static UpdateResult stagePersistentUpdate(
            NativeModdedServer server,
            String dimensionId,
            String pack,
            String packDimensionKey
    ) {
        ModdedDimensionCreations.requireNotCreating(dimensionId);
        synchronized (LOCK) {
            ModdedDimensionRegistryStore.PersistentDimension previous =
                    ModdedDimensionRegistryStore.get(server, dimensionId);
@@ -313,6 +335,7 @@ public final class ModdedDimensionManager {
    }
    public static boolean removePersistent(NativeModdedServer server, String dimensionId, boolean wipeStorage) {
        ModdedDimensionCreations.requireNotCreating(dimensionId);
        ModdedDimensionRegistryStore.PersistentDimension previous =
                ModdedDimensionRegistryStore.get(server, dimensionId);
        ModdedDimensionRegistryStore.remove(server, dimensionId);
@@ -392,16 +415,16 @@ public final class ModdedDimensionManager {
        }
    }
-    private static Handle inject(
+    private static Handle createLevel(
            NativeModdedServer server,
            NativeDimensionRuntime serverAccess,
-            String dimensionId,
+            DimensionRequest requested,
            String key,
            String pack,
            String packDimensionKey,
            long seed,
            RuntimePack runtimePack
    ) {
        String dimensionId = requested.dimensionId();
        String pack = requested.pack();
        String packDimensionKey = requested.packDimensionKey();
        long seed = requested.seed();
        String typeRef = runtimePack.dimensionTypeKey();
        ModdedForcedDatapack.requireRegisteredDimensionType(typeRef,
                serverAccess.hasDimensionType(server, typeRef) ? Optional.of(Boolean.TRUE) : Optional.empty(),
@@ -414,35 +437,54 @@ public final class ModdedDimensionManager {
                            runtimePack.generationMode());
                    return generator;
                }));
-        NativeWorld level = created.world();
+        try {
-        IrisModdedChunkGenerator generator = created.generator();
+            serverAccess.initialize(server, created.world());
            return requested.bind(created.world(), created.generator());
        } catch (Throwable error) {
            rollbackInjection(server, serverAccess, dimensionId, created.world(), created.generator(), false, error);
            throw rethrow(dimensionId, error);
        }
    }
    private static Handle publishLevel(
            NativeModdedServer server,
            NativeDimensionRuntime serverAccess,
            Handle created,
            Engine prepared
    ) {
        NativeWorld level = created.level();
        IrisModdedChunkGenerator generator = created.generator();
        boolean loadEventStarted = false;
        try {
-            serverAccess.initialize(server, level);
+            if (prepared != null) {
                ModdedWorldEngines.installPrepared(level, prepared);
            }
            generator.bindLevel(level);
            Handle handle = new Handle(dimensionId, pack, packDimensionKey, seed, level, generator);
            NativeWorld previous = serverAccess.publish(server, level);
            if (previous != null) {
-                throw new IllegalStateException("Iris cannot inject dimension '" + dimensionId
+                throw new IllegalStateException("Iris cannot inject dimension '" + created.dimensionId()
                        + "': the level was registered concurrently");
            }
            serverAccess.addWorldBorderListener(server, level);
            loadEventStarted = true;
            ModdedEngineBootstrap.loader().fireDynamicLevelLoad(level);
-            return handle;
+            return created;
        } catch (Throwable error) {
-            rollbackInjection(server, serverAccess, key, level, generator, loadEventStarted, error);
+            rollbackInjection(server, serverAccess, created.dimensionId(), level, generator, loadEventStarted, error);
-            if (error instanceof RuntimeException runtimeException) {
+            throw rethrow(created.dimensionId(), error);
                throw runtimeException;
            }
            if (error instanceof Error fatalError) {
                throw fatalError;
            }
            throw new IllegalStateException("Iris runtime dimension injection failed for " + dimensionId, error);
        }
    }
    private static RuntimeException rethrow(String dimensionId, Throwable error) {
        if (error instanceof RuntimeException runtimeException) {
            return runtimeException;
        }
        if (error instanceof Error fatalError) {
            throw fatalError;
        }
        return new IllegalStateException("Iris runtime dimension injection failed for " + dimensionId, error);
    }
    private static void rollbackInjection(NativeModdedServer server, NativeDimensionRuntime serverAccess,
                                          String key, NativeWorld level,
                                          IrisModdedChunkGenerator generator, boolean loadEventStarted,
@@ -511,19 +553,21 @@ public final class ModdedDimensionManager {
                .normalize();
        PackValidationRegistry.requireLoadable(packRoot);
        IrisData data = IrisData.openDatapackCompiler(packRoot.toFile());
        String dimensionTypeRef;
        try {
            IrisDimension dimension = data.getDimensionLoader().load(dimensionKey, false);
            if (dimension == null) {
                throw new IllegalStateException("Transient Iris Studio pack does not contain dimension '"
                        + dimensionKey + "'.");
            }
            dimensionTypeRef = ModdedWorldgenIds.dimensionTypeRef(pack, dimension);
        } finally {
            data.close();
        }
        return new RuntimePack(
                packRoot,
                dimensionKey,
-                ModdedWorldgenIds.dimensionTypeRef(pack, dimensionKey),
+                dimensionTypeRef,
                ModdedGenerationMode.TRANSIENT_STUDIO
        );
    }
@@ -542,9 +586,30 @@ public final class ModdedDimensionManager {
        }
    }
    @FunctionalInterface
    private interface RuntimePackSource {
        RuntimePack open();
    }
    private record DimensionRequest(String dimensionId, String pack, String packDimensionKey, long seed) {
        private static DimensionRequest of(Handle handle) {
            return new DimensionRequest(handle.dimensionId(), handle.pack(), handle.packDimensionKey(), handle.seed());
        }
        private Handle bind(NativeWorld level, IrisModdedChunkGenerator generator) {
            return new Handle(dimensionId, pack, packDimensionKey, seed, level, generator);
        }
    }
    public record Handle(String dimensionId, String pack, String packDimensionKey, long seed, NativeWorld level, IrisModdedChunkGenerator generator) {
    }
    record PendingInjection(Handle handle, boolean present) {
        PendingInjection {
            handle = Objects.requireNonNull(handle, "handle");
        }
    }
    public record UpdateResult(
            boolean pending,
            boolean restartRequired,
@@ -28,6 +28,7 @@ import art.arcane.iris.generation.terrain.IrisDimension;
 import art.arcane.iris.generation.terrain.IrisRegion;
 import art.arcane.volmlib.nativelib.minecraft26_2.terrain.NativeResourceKeys;
 import java.io.File;
 import java.util.LinkedHashSet;
 import java.util.Locale;
 import java.util.Set;
@@ -126,6 +127,20 @@ final class ModdedDimensionMetadata {
        }
    }
    static void warmConfiguredPack(File packDirectory, String dimensionKey) {
        ConfiguredPack configured = ConfiguredPack.load(packDirectory, dimensionKey);
        collectConfiguredBiomeKeys(configured.dimension(), configured.data());
    }
    record ConfiguredPack(IrisData data, IrisDimension dimension, DimensionMetadata metadata) {
        static ConfiguredPack load(File packDirectory, String dimensionKey) {
            IrisData data = IrisData.get(packDirectory);
            IrisDimension dimension = data.getDimensionLoader().load(dimensionKey);
            if (dimension == null) {
                throw new IllegalStateException("Iris dimension '" + dimensionKey
                        + "' missing from pack " + packDirectory.getAbsolutePath());
            }
            return new ConfiguredPack(data, dimension, dimensionMetadata(dimension));
        }
    }
 }
@@ -194,6 +194,11 @@ public final class ModdedDimensionRegistryStore {
        write(file, dimensions, List.of());
    }
    static synchronized void writeWorldRoot(Path worldRoot, List<PersistentDimension> dimensions) {
        Path file = storeFile(worldRoot);
        write(file, dimensions, contents(file).unparsed());
    }
    private static void write(Path file, List<PersistentDimension> dimensions, List<Object> unparsed) {
        JSONArray entries = new JSONArray();
        for (PersistentDimension dimension : dimensions) {
@@ -0,0 +1,144 @@
 /*
 * Iris is a World Generator for Minecraft Servers
 * Copyright (c) 2026 Arcane Arts (Volmit Software)
 *
 * This program is free software: you can redistribute it and/or modify
 * it under the terms of the GNU General Public License as published by
 * the Free Software Foundation, either version 3 of the License, or
 * (at your option) any later version.
 *
 * This program is distributed in the hope that it will be useful,
 * but WITHOUT ANY WARRANTY; without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
 * GNU General Public License for more details.
 *
 * You should have received a copy of the GNU General Public License
 * along with this program.  If not, see <https://www.gnu.org/licenses/>.
 */
 package art.arcane.iris.modded;
 import art.arcane.volmlib.util.json.JSONObject;
 import java.nio.file.Path;
 import java.util.Objects;
 import java.util.OptionalLong;
 import java.util.regex.Pattern;
 public record ModdedDimensionReplacement(String levelKey, String pack, String packDimension, OptionalLong seed) {
    private static final Pattern NAMESPACE = Pattern.compile("[a-z0-9_.-]+");
    private static final Pattern PATH = Pattern.compile("[a-z0-9_.-]+(?:/[a-z0-9_.-]+)*");
    private static final Pattern PACK = Pattern.compile("[A-Za-z0-9_.-]+");
    private static final Pattern PACK_DIMENSION = Pattern.compile("[A-Za-z0-9_.-]+(?:/[A-Za-z0-9_.-]+)*");
    private static final String TYPE = "type";
    private static final String SEED = "seed";
    public ModdedDimensionReplacement {
        Objects.requireNonNull(levelKey, "levelKey");
        Objects.requireNonNull(pack, "pack");
        Objects.requireNonNull(packDimension, "packDimension");
        Objects.requireNonNull(seed, "seed");
    }
    public static ModdedDimensionReplacement parse(String levelKey, String type, OptionalLong seed) {
        String level = requireLevelKey(levelKey);
        String reference = type == null ? "" : type.trim();
        int packColon = reference.indexOf(':');
        String pack = packColon >= 0 ? reference.substring(0, packColon) : reference;
        String packDimension = packColon >= 0 ? reference.substring(packColon + 1) : reference;
        if (!PACK.matcher(pack).matches()
                || !PACK_DIMENSION.matcher(packDimension).matches()
                || pack.contains("..")
                || packDimension.contains("..")) {
            throw new IllegalArgumentException("Invalid replacement type '" + type
                    + "' for " + level + ". Use pack or pack:dimensionKey.");
        }
        OptionalLong replacementSeed = Objects.requireNonNull(seed, "seed");
        if (replacementSeed.isPresent()) {
            requireUsableSeed(replacementSeed.getAsLong());
        }
        return new ModdedDimensionReplacement(level, pack, packDimension, replacementSeed);
    }
    public static long requireUsableSeed(long seed) {
        if (seed == Long.MIN_VALUE) {
            throw new IllegalArgumentException("Seed " + Long.MIN_VALUE
                    + " is reserved on mod loaders; choose any other signed 64-bit integer");
        }
        return seed;
    }
    public static ModdedDimensionReplacement fromJson(String levelKey, Object value) {
        if (!(value instanceof JSONObject entry)) {
            throw new IllegalArgumentException("the replacement must be an object with a \"type\" and an optional \"seed\"");
        }
        Object type = entry.opt(TYPE);
        if (!(type instanceof String typeRef)) {
            throw new IllegalArgumentException("the replacement \"type\" must be a pack or pack:dimensionKey string");
        }
        if (!entry.has(SEED) || entry.isNull(SEED)) {
            return parse(levelKey, typeRef, OptionalLong.empty());
        }
        Object seed = entry.opt(SEED);
        if (!(seed instanceof Integer) && !(seed instanceof Long)) {
            throw new IllegalArgumentException("the replacement \"seed\" must be a signed 64-bit integer");
        }
        return parse(levelKey, typeRef, OptionalLong.of(((Number) seed).longValue()));
    }
    public JSONObject toJson() {
        JSONObject json = new JSONObject();
        json.put(TYPE, packRef());
        if (seed.isPresent()) {
            json.put(SEED, seed.getAsLong());
        }
        return json;
    }
    public String packRef() {
        return pack.equals(packDimension) ? pack : pack + ":" + packDimension;
    }
    public ModdedDimensionReplacement withSeed(long replacementSeed) {
        return new ModdedDimensionReplacement(levelKey, pack, packDimension, OptionalLong.of(replacementSeed));
    }
    public ModdedDimensionReplacement withPack(String canonicalPack, String canonicalPackDimension) {
        return new ModdedDimensionReplacement(levelKey, canonicalPack, canonicalPackDimension, seed);
    }
    public String namespace() {
        return levelKey.substring(0, levelKey.indexOf(':'));
    }
    public String path() {
        return levelKey.substring(levelKey.indexOf(':') + 1);
    }
    public Path storageFolder(Path worldRoot) {
        return storageFolder(worldRoot, levelKey);
    }
    public static Path storageFolder(Path worldRoot, String levelKey) {
        String level = requireLevelKey(levelKey);
        int colon = level.indexOf(':');
        Path folder = worldRoot.resolve("dimensions").resolve(level.substring(0, colon));
        for (String segment : level.substring(colon + 1).split("/")) {
            folder = folder.resolve(segment);
        }
        return folder;
    }
    public static String requireLevelKey(String levelKey) {
        String level = levelKey == null ? "" : levelKey.trim();
        int colon = level.indexOf(':');
        if (colon <= 0
                || !NAMESPACE.matcher(level.substring(0, colon)).matches()
                || !PATH.matcher(level.substring(colon + 1)).matches()
                || level.contains("..")) {
            throw new IllegalArgumentException("Invalid dimension key '" + levelKey
                    + "'. Use namespace:path, for example examplemod:skylands.");
        }
        return level;
    }
 }
@@ -0,0 +1,315 @@
 /*
 * Iris is a World Generator for Minecraft Servers
 * Copyright (c) 2026 Arcane Arts (Volmit Software)
 *
 * This program is free software: you can redistribute it and/or modify
 * it under the terms of the GNU General Public License as published by
 * the Free Software Foundation, either version 3 of the License, or
 * (at your option) any later version.
 *
 * This program is distributed in the hope that it will be useful,
 * but WITHOUT ANY WARRANTY; without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
 * GNU General Public License for more details.
 *
 * You should have received a copy of the GNU General Public License
 * along with this program.  If not, see <https://www.gnu.org/licenses/>.
 */
 package art.arcane.iris.modded;
 import art.arcane.iris.modded.catalog.ModdedWorldgenCatalogs;
 import art.arcane.iris.pack.ingest.catalog.CatalogLevelStem;
 import art.arcane.iris.pack.ingest.catalog.WorldgenCatalog;
 import art.arcane.iris.pack.ingest.catalog.WorldgenCatalogStore;
 import art.arcane.iris.spi.IrisPlatforms;
 import art.arcane.volmlib.util.json.JSONObject;
 import java.io.File;
 import java.io.IOException;
 import java.nio.charset.StandardCharsets;
 import java.nio.file.Files;
 import java.nio.file.Path;
 import java.util.LinkedHashMap;
 import java.util.List;
 import java.util.Map;
 import java.util.Objects;
 import java.util.Optional;
 import java.util.OptionalLong;
 import java.util.Set;
 import java.util.TreeMap;
 import java.util.TreeSet;
 public final class ModdedDimensionReplacements {
    public static final String IRIS_GENERATOR = "irisworldgen:iris";
    private static final Set<String> VANILLA_LEVELS = Set.of("minecraft:overworld", "minecraft:the_nether",
            "minecraft:the_end");
    private static volatile RecordedCatalog recordedCatalog;
    private static final String PLACEHOLDER_BIOME_SOURCE = "minecraft:fixed";
    private static final String PLACEHOLDER_BIOME = "minecraft:plains";
    private static final String DIMENSIONS = "dimensions";
    private static final String JSON = ".json";
    private ModdedDimensionReplacements() {
    }
    public static String levelStemJson(String dimensionTypeKey, ModdedDimensionReplacement replacement) {
        JSONObject biomeSource = new JSONObject();
        biomeSource.put("type", PLACEHOLDER_BIOME_SOURCE);
        biomeSource.put("biome", PLACEHOLDER_BIOME);
        JSONObject generator = new JSONObject();
        generator.put("type", IRIS_GENERATOR);
        generator.put("biome_source", biomeSource);
        generator.put("dimension", replacement.packRef());
        JSONObject stem = new JSONObject();
        stem.put("type", Objects.requireNonNull(dimensionTypeKey, "dimensionTypeKey"));
        stem.put("generator", generator);
        return stem.toString(2) + "\n";
    }
    public static Path writeLevelStem(Path datapackRoot, ModdedDimensionReplacement replacement, String dimensionTypeKey)
            throws IOException {
        Path output = datapackRoot.resolve("data").resolve(replacement.namespace()).resolve("dimension");
        String[] segments = replacement.path().split("/");
        for (int index = 0; index < segments.length - 1; index++) {
            output = output.resolve(segments[index]);
        }
        output = output.resolve(segments[segments.length - 1] + ".json");
        Files.createDirectories(output.getParent());
        Files.writeString(output, levelStemJson(dimensionTypeKey, replacement), StandardCharsets.UTF_8);
        return output;
    }
    public static void writeLevelStems(Path datapackRoot, Map<String, ModdedDimensionReplacement> configured,
                                       StagedTypes staged, Path worldRoot, ReplaceableLevels levels) throws IOException {
        for (ModdedDimensionReplacement replacement : new TreeMap<>(configured).values()) {
            if (!levels.replaceable(replacement.levelKey())) {
                ModdedIrisLog.error(unreplaceableReason(replacement.levelKey(), levels)
                        + " Iris writes no dimension override for it.");
                continue;
            }
            String typeRef = staged.typeRef(replacement, worldRoot);
            if (typeRef == null) {
                skipUnstaged(replacement, staged, worldRoot);
                continue;
            }
            writeLevelStem(datapackRoot, replacement, typeRef);
            ModdedIrisLog.info("Iris dimension replacement staged: {} generates from {} with dimension type {}",
                    replacement.levelKey(), replacement.packRef(), typeRef);
        }
    }
    public static Map<String, ModdedDimensionReplacement> configured() throws IOException {
        return canonical(ModdedModConfig.get().dimensionReplacements(), IrisPlatforms.get().packsFolderNoCreate().toPath());
    }
    public static Map<String, ModdedDimensionReplacement> stageable(Map<String, ModdedDimensionReplacement> configured,
                                                                   ReplaceableLevels levels) {
        Map<String, ModdedDimensionReplacement> stageable = new TreeMap<>();
        for (ModdedDimensionReplacement replacement : configured.values()) {
            if (levels.replaceable(replacement.levelKey())) {
                stageable.put(replacement.levelKey(), replacement);
            }
        }
        return Map.copyOf(stageable);
    }
    public static ReplaceableLevels replaceableLevels(Path worldRoot, Map<String, ModdedDimensionReplacement> configured)
            throws IOException {
        if (configured.isEmpty()) {
            return ReplaceableLevels.unknown();
        }
        return replaceableLevels(worldRoot);
    }
    public static ReplaceableLevels replaceableLevels(Path worldRoot) throws IOException {
        Set<String> applied = worldRoot == null
                ? Set.of()
                : ModdedReplacementReconciler.readState(worldRoot).applied().keySet();
        Optional<WorldgenCatalog> catalog = ModdedWorldgenCatalogs.latest();
        if (catalog.isEmpty()) {
            catalog = recordedCatalog();
        }
        return catalog.isEmpty()
                ? ReplaceableLevels.unknown()
                : ReplaceableLevels.of(catalog.get().levelStems(), applied);
    }
    public static String unreplaceableReason(String levelKey, ReplaceableLevels levels) {
        if (!levels.known()) {
            return "Iris refuses to replace " + levelKey + ": it has no record of which dimensions this server loads"
                    + " from level stems yet. Start the server once so Iris can read the dimension registry.";
        }
        return "Iris refuses to replace " + levelKey + ": it is not a dimension the server loads from a level stem;"
                + " a mod creates it while the server runs, so its data stays untouched.";
    }
    private static Optional<WorldgenCatalog> recordedCatalog() {
        Path file = ModdedWorldgenCatalogs.catalogFile();
        if (!Files.isRegularFile(file)) {
            return Optional.empty();
        }
        try {
            long modified = Files.getLastModifiedTime(file).toMillis();
            RecordedCatalog cached = recordedCatalog;
            if (cached != null && cached.file().equals(file) && cached.modified() == modified) {
                return Optional.of(cached.catalog());
            }
            WorldgenCatalog catalog = WorldgenCatalogStore.read(file);
            recordedCatalog = new RecordedCatalog(file, modified, catalog);
            return Optional.of(catalog);
        } catch (IOException | RuntimeException unreadable) {
            ModdedIrisLog.error("Iris could not read the recorded worldgen catalog at {}; only the vanilla dimensions are replaceable until the next start records it",
                    file, unreadable);
            return Optional.empty();
        }
    }
    public static OptionalLong loadedSeed(String levelKey) {
        ModdedModConfig config = ModdedModConfig.loaded();
        if (config == null) {
            return OptionalLong.empty();
        }
        ModdedDimensionReplacement replacement = config.dimensionReplacements().get(levelKey);
        return replacement == null ? OptionalLong.empty() : replacement.seed();
    }
    static Map<String, ModdedDimensionReplacement> canonical(Map<String, ModdedDimensionReplacement> configured,
                                                            Path packsRoot) throws IOException {
        Map<String, ModdedDimensionReplacement> canonical = new TreeMap<>();
        for (ModdedDimensionReplacement replacement : configured.values()) {
            canonical.put(replacement.levelKey(), canonical(replacement, packsRoot));
        }
        return Map.copyOf(canonical);
    }
    public static ModdedDimensionReplacement canonical(ModdedDimensionReplacement replacement, Path packsRoot)
            throws IOException {
        Path pack = packsRoot.resolve(replacement.pack());
        if (!Files.isDirectory(pack)) {
            return replacement;
        }
        String packName = sameIgnoringCase(pack.toRealPath().getFileName().toString(), replacement.pack());
        Path dimensions = pack.resolve(DIMENSIONS);
        Path dimensionFile = dimensions.resolve(replacement.packDimension() + JSON);
        String dimension = replacement.packDimension();
        if (Files.isRegularFile(dimensionFile)) {
            String relative = dimensions.toRealPath().relativize(dimensionFile.toRealPath()).toString()
                    .replace(File.separatorChar, '/');
            dimension = sameIgnoringCase(relative.substring(0, relative.length() - JSON.length()), replacement.packDimension());
        }
        return replacement.withPack(packName, dimension);
    }
    public static boolean installed(ModdedDimensionReplacement replacement, Path packsRoot) {
        return Files.isRegularFile(packsRoot.resolve(replacement.pack()).resolve(DIMENSIONS)
                .resolve(replacement.packDimension() + JSON));
    }
    public static boolean matches(ModdedDimensionReplacement applied, ModdedDimensionReplacement configured) {
        if (applied == null || configured == null) {
            return applied == configured;
        }
        if (!applied.packRef().equals(configured.packRef())) {
            return false;
        }
        return configured.seed().isEmpty() || configured.seed().equals(applied.seed());
    }
    public static Set<String> changedLevels(Map<String, ModdedDimensionReplacement> applied,
                                            Map<String, ModdedDimensionReplacement> configured) {
        Set<String> levels = new TreeSet<>(applied.keySet());
        levels.addAll(configured.keySet());
        Set<String> changed = new TreeSet<>();
        for (String level : levels) {
            if (!matches(applied.get(level), configured.get(level))) {
                changed.add(level);
            }
        }
        return changed;
    }
    private static void skipUnstaged(ModdedDimensionReplacement replacement, StagedTypes staged, Path worldRoot)
            throws IOException {
        String reason = "pack '" + replacement.pack() + "' dimension '" + replacement.packDimension()
                + "' is not installed or failed validation" + caseHint(replacement, staged);
        if (worldRoot != null && ModdedReplacementReconciler.hasReplacementRecord(worldRoot, replacement.levelKey())) {
            throw new IOException("Iris refused to stage the replacement of " + replacement.levelKey() + ": " + reason
                    + ", and the level already has an applied replacement or Iris generation history. Restore the pack, or remove the "
                    + replacement.levelKey() + " entry from dimensionReplacements in modded.json to hand the level back to its own generator.");
        }
        ModdedIrisLog.error("Iris skipped the replacement of {}: {}, so the dimension keeps its own generator and the replacement stays unapplied",
                replacement.levelKey(), reason);
    }
    private static String caseHint(ModdedDimensionReplacement replacement, StagedTypes staged) {
        String wanted = replacement.pack() + ":" + replacement.packDimension();
        for (String installed : staged.installed().keySet()) {
            if (installed.equalsIgnoreCase(wanted)) {
                return "; pack names and dimension keys are case-sensitive, the installed dimension is " + installed;
            }
        }
        return "";
    }
    private static String sameIgnoringCase(String actual, String configured) {
        return actual.equalsIgnoreCase(configured) ? actual : configured;
    }
    public static String fingerprint(Map<String, ModdedDimensionReplacement> configured) {
        StringBuilder canonical = new StringBuilder();
        for (Map.Entry<String, ModdedDimensionReplacement> entry : new TreeMap<>(configured).entrySet()) {
            canonical.append(entry.getKey()).append('=').append(entry.getValue().packRef()).append('\n');
        }
        return canonical.toString();
    }
    private record RecordedCatalog(Path file, long modified, WorldgenCatalog catalog) {
    }
    public record ReplaceableLevels(boolean known, Map<String, String> stemGenerators, Set<String> applied) {
        public ReplaceableLevels {
            stemGenerators = Map.copyOf(stemGenerators);
            applied = Set.copyOf(applied);
        }
        public static ReplaceableLevels unknown() {
            return new ReplaceableLevels(false, Map.of(), Set.of());
        }
        public static ReplaceableLevels of(List<CatalogLevelStem> stems, Set<String> applied) {
            Map<String, String> generators = new TreeMap<>();
            for (CatalogLevelStem stem : stems) {
                generators.put(stem.key(), stem.generatorType());
            }
            return new ReplaceableLevels(true, generators, applied);
        }
        public boolean replaceable(String levelKey) {
            if (VANILLA_LEVELS.contains(levelKey)) {
                return true;
            }
            String generator = stemGenerators.get(levelKey);
            if (generator == null) {
                return false;
            }
            return !IRIS_GENERATOR.equals(generator) || applied.contains(levelKey);
        }
    }
    public record StagedTypes(Map<String, String> installed, Map<Path, String> retained) {
        public static StagedTypes create() {
            return new StagedTypes(new LinkedHashMap<>(), new LinkedHashMap<>());
        }
        String typeRef(ModdedDimensionReplacement replacement, Path worldRoot) {
            if (worldRoot != null) {
                String retainedType = retained.get(replacement.storageFolder(worldRoot).toAbsolutePath().normalize());
                if (retainedType != null) {
                    return retainedType;
                }
            }
            return installed.get(replacement.pack() + ":" + replacement.packDimension());
        }
    }
 }
@@ -43,6 +43,10 @@ public final class ModdedDimensionStorage {
    private ModdedDimensionStorage() {
    }
    static List<String> chunkDataFolders() {
        return CHUNK_DATA_FOLDERS;
    }
    public static File storageFolder(NativeModdedServer server, String dimension) {
        return server.dimensionFolder(dimension).toFile();
    }
@@ -58,6 +58,7 @@ import art.arcane.iris.generation.block.BlockDataMergeSupport;
 import art.arcane.iris.structure.object.IrisObjectRotation;
 import art.arcane.iris.generation.block.TileData;
 import art.arcane.iris.modded.api.ModdedCustomContentRegistry;
 import art.arcane.iris.modded.catalog.ModdedWorldgenCatalogs;
 import art.arcane.iris.modded.command.IrisModdedCommands;
 import art.arcane.iris.modded.command.ModdedGuiHost;
 import art.arcane.iris.modded.command.ModdedObjectUndo;
@@ -144,6 +145,7 @@ public final class ModdedEngineBootstrap {
        }
        IrisModdedCommands.openDownloadAdmission();
        ModdedStartup.prepareForStartup();
        ModdedStartup.prepareDimensionRestore(server);
        IrisModdedChunkGenerator.startGenPool();
        bindWorldGenerators(server);
        services().enableAll();
@@ -163,6 +165,13 @@ public final class ModdedEngineBootstrap {
        finishPreviousServer("server start");
        captureInitialSpawn(server);
        ModdedStartup.prepareForStartup();
        ModdedStartup.prepareDimensionRestore(server);
    }
    public static void levelsReady(NativeModdedServer server) {
        server.refreshWorlds();
        bindWorldGenerators(server);
        ModdedStartup.reinjectPersistentDimensions(server);
    }
    public static void serverStarted(NativeModdedServer server) {
@@ -171,8 +180,15 @@ public final class ModdedEngineBootstrap {
        server.refreshWorlds();
        bindWorldGenerators(server);
        ModdedStartup.runOnce(server);
-        reconcileSpawn(server);
+        boolean replacedOverworld = !loader().clientEnvironment() && ModdedReplacementEntry.prepare(server);
        reconcileSpawn(server, replacedOverworld);
        if (!loader().clientEnvironment()) {
            ModdedReplacementReconciler.recordApplied(server);
            ModdedReplacementReconciler.stopUnpublishedEngines(server);
            ModdedReplacementEntry.retireIfComplete();
        }
        ModdedWorldCheck.serverStarted(server);
        ModdedWorldgenCatalogs.capture(server);
    }
    public static void levelLoaded(NativeWorld world) {
@@ -203,6 +219,7 @@ public final class ModdedEngineBootstrap {
        stoppedPending = true;
        Throwable failure = null;
        failure = runStopStage(failure, "pack downloads", IrisModdedCommands::shutdownDownloads);
        failure = runStopStage(failure, "dimension creations", ModdedDimensionCreations::cancelAll);
        failure = runStopStage(failure, "world check", () -> ModdedWorldCheck.serverStopped(stoppingServer));
        failure = runStopStage(failure, "protocol", ModdedProtocolHandler::stop);
        failure = runStopStage(failure, "pregenerator", ModdedPregenJob::shutdown);
@@ -270,6 +287,7 @@ public final class ModdedEngineBootstrap {
        Throwable failure = null;
        failure = runStopStage(failure, "world engines", ModdedWorldEngines::shutdown);
        failure = runStopStage(failure, "primary world router", ModdedPrimaryWorldRouter::clear);
        failure = runStopStage(failure, "replacement entry guard", ModdedReplacementEntry::clear);
        failure = runStopStage(failure, "dimension manager", ModdedDimensionManager::clear);
        ModdedScheduler scheduler = schedulerOrNull();
        if (scheduler != null) {
@@ -325,7 +343,7 @@ public final class ModdedEngineBootstrap {
        spawnCaptureServer = server;
    }
-    private static void reconcileSpawn(NativeModdedServer server) {
+    private static void reconcileSpawn(NativeModdedServer server, boolean replacedOverworld) {
        NativeServerSpawn spawn = new NativeServerSpawn(server);
        NativeServerSpawn.Respawn current = spawn.current();
        if (current == null || current.world() == null) {
@@ -337,7 +355,8 @@ public final class ModdedEngineBootstrap {
        }
        String dimensionId = level.name();
        boolean studio = dimensionId.startsWith("irisworldgen:studio_");
-        if (!shouldReconcileSpawn(initialSpawnWasDefault, studio, current.position().x(), current.position().z())) {
+        if (!shouldReconcileSpawn(initialSpawnWasDefault || replacedOverworld, studio,
                current.position().x(), current.position().z())) {
            return;
        }
        int surfaceY = spawn.surfaceAtOrigin(level);
@@ -367,6 +386,9 @@ public final class ModdedEngineBootstrap {
        selfTest(moddedLoader.getClass().getClassLoader());
        bind();
        IrisLanguage.initialize();
        if (!moddedLoader.clientEnvironment()) {
            ModdedReplacementReconciler.reconcileEarly();
        }
        ModdedStartup.prefetchStartupDatapack();
        if (!moddedLoader.clientEnvironment()) {
            MainWorldService.reconcileEarly();
@@ -324,6 +324,10 @@ public final class ModdedForcedDatapack {
                false
        );
        digest.update(inputFingerprint.getBytes(StandardCharsets.UTF_8));
        Map<String, ModdedDimensionReplacement> replacements = ModdedDimensionReplacements.configured();
        digest.update(ModdedDimensionReplacements.fingerprint(ModdedDimensionReplacements.stageable(replacements,
                        ModdedDimensionReplacements.replaceableLevels(worldRootOrNull(), replacements)))
                .getBytes(StandardCharsets.UTF_8));
        return HexFormat.of().formatHex(digest.digest());
    }
@@ -333,15 +337,21 @@ public final class ModdedForcedDatapack {
        int packCount = 0;
        KList<String> presetIds = new KList<>();
        ModdedDimensionReplacements.StagedTypes stagedDimensionTypes = ModdedDimensionReplacements.StagedTypes.create();
        Path worldRoot = worldRootOrNull();
        Set<PackSelection> legacySelections = unadoptedSelections(worldRoot);
        List<File> packRoots = compilationPackRoots(worldRoot);
        for (File pack : packRoots) {
            PackStageContext context = packStageContext(pack.toPath(), legacySelections);
-            if (stagePack(context, fixer, stagingDirectory, seenBiomes, presetIds)) {
+            if (stagePack(context, fixer, stagingDirectory, seenBiomes, presetIds, stagedDimensionTypes)) {
                packCount++;
            }
        }
        if (!ModdedEngineBootstrap.loader().clientEnvironment()) {
            Map<String, ModdedDimensionReplacement> replacements = ModdedDimensionReplacements.configured();
            ModdedDimensionReplacements.writeLevelStems(stagingDirectory, replacements, stagedDimensionTypes, worldRoot,
                    ModdedDimensionReplacements.replaceableLevels(worldRoot, replacements));
        }
        IrisDatapackCompiler.installRetainedRegistrySources(packRoots, List.of(stagingDirectory.toFile()), fixer);
        writePackMeta(stagingDirectory);
@@ -362,7 +372,8 @@ public final class ModdedForcedDatapack {
    private static boolean stagePack(PackStageContext context, IDataFixer fixer, Path stagingDirectory,
                                     Map<String, KSet<String>> seenBiomes,
-                                     KList<String> presetIds) throws IOException {
+                                     KList<String> presetIds,
                                     ModdedDimensionReplacements.StagedTypes stagedDimensionTypes) throws IOException {
        File sourcePack = context.packRoot().toFile();
        PackValidationResult validation;
        try {
@@ -392,11 +403,12 @@ public final class ModdedForcedDatapack {
                stagingDirectory.getParent(), PACK_FOLDER + ".pack-" + sourcePack.getName() + "-");
        Map<String, KSet<String>> packBiomes = new LinkedHashMap<>();
        KList<String> packPresetIds = new KList<>();
        ModdedDimensionReplacements.StagedTypes packDimensionTypes = ModdedDimensionReplacements.StagedTypes.create();
        KList<File> packFolders = new KList<>();
        packFolders.add(packStagingDirectory.toFile());
        boolean installed;
        try {
-            installed = installPack(context, fixer, packFolders, packBiomes, packPresetIds);
+            installed = installPack(context, fixer, packFolders, packBiomes, packPresetIds, packDimensionTypes);
        } catch (Throwable installationFailure) {
            if (context.required()) {
                throw requiredPackFailure(context, "datapack serialization", installationFailure);
@@ -414,6 +426,8 @@ public final class ModdedForcedDatapack {
            mergeDirectory(packStagingDirectory, stagingDirectory);
            mergeBiomes(seenBiomes, packBiomes);
            presetIds.addAll(packPresetIds);
            stagedDimensionTypes.installed().putAll(packDimensionTypes.installed());
            stagedDimensionTypes.retained().putAll(packDimensionTypes.retained());
            return true;
        } finally {
            try {
@@ -454,6 +468,8 @@ public final class ModdedForcedDatapack {
                Files.createDirectories(destination);
            } else if (!Files.exists(destination)) {
                Files.copy(source, destination);
            } else if (Files.isRegularFile(destination) && ModdedDatapackTagMerge.isTag(relative)) {
                ModdedDatapackTagMerge.merge(source, destination);
            } else if (!Files.isRegularFile(destination) || Files.mismatch(source, destination) != -1L) {
                throw new IOException("Conflicting Iris datapack output at " + destination + ".");
            }
@@ -470,7 +486,8 @@ public final class ModdedForcedDatapack {
    private static boolean installPack(PackStageContext context, IDataFixer fixer, KList<File> folders,
                                       Map<String, KSet<String>> seenBiomes,
-                                       KList<String> presetIds) throws IOException {
+                                       KList<String> presetIds,
                                       ModdedDimensionReplacements.StagedTypes dimensionTypes) throws IOException {
        File packFolder = context.packRoot().toFile();
        String packName = context.packName();
        File dimensionsDirectory = new File(packFolder, "dimensions");
@@ -504,18 +521,30 @@ public final class ModdedForcedDatapack {
                        biomesForNamespace(seenBiomes, "iris"),
                        context
                );
-                writeDimensionType(
+                String typeRef = context.dimensionTypeRef(dimensionKey);
-                        folders,
+                if (dimension.hasBorrowedDimensionType()) {
-                        fixer,
+                    typeRef = requireBorrowedType(context, dimension, typeRef);
-                        dimension,
+                } else {
-                        context.dimensionTypeRef(dimensionKey),
+                    requireScopedType(context, typeRef);
-                        context.emitLegacyDimensionTypeAlias(),
+                    writeDimensionType(
-                        context
+                            folders,
-                );
+                            fixer,
                            dimension,
                            typeRef,
                            context.emitLegacyDimensionTypeAlias(),
                            context
                    );
                }
                if (context.retainedDimensionRoot() != null) {
                    dimensionTypes.retained().put(context.retainedDimensionRoot(), typeRef);
                }
                if (context.emitPresets()) {
-                    String presetRef = ModdedWorldgenIds.presetRef(packName, dimensionKey);
+                    dimensionTypes.installed().put(packName + ":" + dimensionKey, typeRef);
-                    writeWorldPreset(folders, packName, dimensionKey, presetRef);
+                    if (!dimension.hasBorrowedDimensionType()) {
-                    presetIds.add(presetRef);
+                        String presetRef = ModdedWorldgenIds.presetRef(packName, dimensionKey);
                        writeWorldPreset(folders, packName, dimensionKey, presetRef);
                        presetIds.add(presetRef);
                    }
                }
                installedDimensions++;
            }
@@ -542,6 +571,22 @@ public final class ModdedForcedDatapack {
                        + " (datapack source injection failed; see the Iris boot ERROR), so a restart alone will not register it.")));
    }
    private static void requireScopedType(PackStageContext context, String stagedTypeRef) throws IOException {
        if (context.required() && ModdedWorldgenIds.scopedDimensionType(stagedTypeRef).isEmpty()) {
            throw new IOException("Retained Iris dimension type key is not scoped: " + stagedTypeRef);
        }
    }
    private static String requireBorrowedType(PackStageContext context, IrisDimension dimension, String stagedTypeRef)
            throws IOException {
        String borrowed = dimension.getBorrowedDimensionType().trim();
        if (context.required() && !borrowed.equals(stagedTypeRef)) {
            throw new IOException("Retained Iris generation pack at " + context.packRoot() + " borrows dimension type "
                    + borrowed + ", but its generation history records " + stagedTypeRef + ".");
        }
        return borrowed;
    }
    private static void writeWorldPreset(KList<File> folders, String packName, String dimensionKey,
                                         String presetRef) throws IOException {
        String dimensionRef = dimensionKey.equals(packName) ? packName : packName + ":" + dimensionKey;
@@ -789,14 +834,16 @@ public final class ModdedForcedDatapack {
        Path normalizedRoot = packRoot.toAbsolutePath().normalize();
        RetainedPack retained = retainedPack(normalizedRoot);
        if (retained != null) {
-            ModdedWorldgenIds.ScopedDimension identity = ModdedWorldgenIds
+            GenerationEpoch.DimensionContract contract = retained.epoch().dimensionContract();
-                    .scopedDimensionType(retained.epoch().dimensionContract().dimensionTypeKey())
+            Optional<ModdedWorldgenIds.ScopedDimension> scoped = ModdedWorldgenIds.scopedDimensionType(contract.dimensionTypeKey());
-                    .orElseThrow(() -> new IOException("Retained Iris dimension type key is not scoped: "
+            if (scoped.isEmpty()) {
-                            + retained.epoch().dimensionContract().dimensionTypeKey()));
+                return PackStageContext.retained(normalizedRoot, retainedPackName(retained.epoch(), normalizedRoot), retained);
-            if (!identity.dimension().equals(retained.epoch().dimensionContract().dimensionKey())) {
+            }
            ModdedWorldgenIds.ScopedDimension identity = scoped.get();
            if (!identity.dimension().equals(contract.dimensionKey())) {
                throw new IOException("Retained Iris dimension type identity does not match its epoch contract.");
            }
-            return PackStageContext.retained(normalizedRoot, identity.pack(), retained.epoch());
+            return PackStageContext.retained(normalizedRoot, identity.pack(), retained);
        }
        String packName = normalizedRoot.getFileName().toString();
@@ -809,6 +856,16 @@ public final class ModdedForcedDatapack {
        return PackStageContext.installed(normalizedRoot, packName, legacyDimensions);
    }
    static String retainedPackName(GenerationEpoch epoch, Path packRoot) throws IOException {
        String dimensionKey = epoch.dimensionContract().dimensionKey();
        Set<String> packs = ModdedWorldgenIds.aliasPacks(epoch.registryContract(), dimensionKey);
        if (packs.size() > 1) {
            throw new IOException("Retained Iris generation pack at " + packRoot
                    + " records scoped biome aliases from several packs " + packs + ".");
        }
        return packs.isEmpty() ? dimensionKey : packs.iterator().next();
    }
    private static RetainedPack retainedPack(Path packRoot) throws IOException {
        Path epochRoot = packRoot.getParent();
        Path epochsRoot = epochRoot == null ? null : epochRoot.getParent();
@@ -868,7 +925,8 @@ public final class ModdedForcedDatapack {
            boolean emitLegacyDimensionTypeAlias,
            boolean required,
            Set<String> legacyDimensions,
-            GenerationRegistryContract retainedContract
+            GenerationRegistryContract retainedContract,
            Path retainedDimensionRoot
    ) implements IrisCustomBiomeAliasResolver {
        private static PackStageContext installed(
                Path packRoot,
@@ -884,6 +942,7 @@ public final class ModdedForcedDatapack {
                    true,
                    false,
                    Set.copyOf(legacyDimensions),
                    null,
                    null
            );
        }
@@ -891,8 +950,9 @@ public final class ModdedForcedDatapack {
        private static PackStageContext retained(
                Path packRoot,
                String packName,
-                GenerationEpoch epoch
+                RetainedPack retained
        ) {
            GenerationEpoch epoch = retained.epoch();
            return new PackStageContext(
                    packRoot,
                    packName,
@@ -902,7 +962,8 @@ public final class ModdedForcedDatapack {
                    true,
                    true,
                    Set.of(),
-                    epoch.registryContract()
+                    epoch.registryContract(),
                    retained.history().paths().dimensionRoot().toAbsolutePath().normalize()
            );
        }
@@ -9,6 +9,7 @@ import art.arcane.iris.pack.BrokenPackException;
 import art.arcane.iris.pack.PackFingerprints;
 import art.arcane.iris.pack.PackValidationRegistry;
 import art.arcane.iris.pack.PackValidationResult;
 import art.arcane.iris.world.history.GenerationAdmission;
 import art.arcane.iris.world.history.GenerationEpoch;
 import art.arcane.iris.world.history.GenerationEpochContractFactory;
 import art.arcane.iris.world.history.GenerationHistory;
@@ -28,6 +29,7 @@ import java.util.Collection;
 import java.util.List;
 import java.util.Objects;
 import java.util.Optional;
 import java.util.stream.Stream;
 final class ModdedGenerationHistoryStorage {
    private ModdedGenerationHistoryStorage() {
@@ -52,7 +54,7 @@ final class ModdedGenerationHistoryStorage {
                    ModdedGenerationHistoryStorage::requireRegistryDefinitions,
                    IrisSettings.get().getGenerator().getGenerationTransitionWidthBlocks()
            );
-            return resolveActive(history);
+            return resolveActive(history, source);
        } catch (IOException failure) {
            throw historyFailure(levelKey, failure);
        }
@@ -67,25 +69,85 @@ final class ModdedGenerationHistoryStorage {
    ) {
        Path dimensionRoot = dimensionRoot(server, levelKey);
        try {
-            GenerationHistory history = restoreOrAdopt(
+            GenerationHistory history = openForRestore(dimensionRoot, selectedPack, selectedDimensionKey, worldSeed);
-                    dimensionRoot,
+            return resolveActive(history, installedPackSource(selectedPack));
                    worldSeed,
                    () -> {
                        Path source = selectedPackSource(selectedPack, selectedDimensionKey);
                        return new AdoptionSource(source, captureCandidate(
                                source,
                                selectedDimensionKey,
                                GenerationRegistryContractFactory.CustomBiomeAliasPolicy.RETAIN_LEGACY_ALIASES
                        ));
                    },
                    ModdedGenerationHistoryStorage::requireRegistryDefinitions
            );
            return resolveActive(history);
        } catch (IOException failure) {
            throw historyFailure(levelKey, failure);
        }
    }
    static PreparedHistory prepareRestore(
            NativeModdedServer server,
            String levelKey,
            String selectedPack,
            String selectedDimensionKey,
            long worldSeed
    ) {
        Path dimensionRoot = dimensionRoot(server, levelKey);
        try {
            GenerationHistory history = openForRestore(dimensionRoot, selectedPack, selectedDimensionKey, worldSeed);
            return prepare(history, installedPackSource(selectedPack));
        } catch (IOException failure) {
            throw historyFailure(levelKey, failure);
        }
    }
    static PreparedHistory prepareCreate(
            NativeModdedServer server,
            String levelKey,
            String selectedPack,
            String selectedDimensionKey,
            long worldSeed
    ) {
        Path dimensionRoot = dimensionRoot(server, levelKey);
        try {
            Path source = selectedPackSource(selectedPack, selectedDimensionKey);
            GenerationHistory history = createOrStage(
                    dimensionRoot,
                    source,
                    worldSeed,
                    captureCandidate(source, selectedDimensionKey),
                    ModdedGenerationHistoryStorage::requireRegistryDefinitions,
                    IrisSettings.get().getGenerator().getGenerationTransitionWidthBlocks()
            );
            return prepare(history, source);
        } catch (IOException failure) {
            throw historyFailure(levelKey, failure);
        }
    }
    private static PreparedHistory prepare(GenerationHistory history, Path validatedSource) throws IOException {
        GenerationAdmission.RuntimeLease lease = history.retainRuntime();
        try {
            history.prepareCurrentGenerator(IrisSettings.get().getGenerator().getGenerationTransitionWidthBlocks());
            return new PreparedHistory(resolveActive(history, validatedSource), lease);
        } catch (IOException | RuntimeException | Error failure) {
            lease.close();
            throw failure;
        }
    }
    private static GenerationHistory openForRestore(
            Path dimensionRoot,
            String selectedPack,
            String selectedDimensionKey,
            long worldSeed
    ) throws IOException {
        return restoreOrAdopt(
                dimensionRoot,
                worldSeed,
                () -> {
                    Path source = selectedPackSource(selectedPack, selectedDimensionKey);
                    return new AdoptionSource(source, captureCandidate(
                            source,
                            selectedDimensionKey,
                            adoptionAliasPolicy(dimensionRoot)
                    ));
                },
                ModdedGenerationHistoryStorage::requireRegistryDefinitions
        );
    }
    static ActivePack openOrAdopt(
            NativeWorld level,
            String selectedPack,
@@ -170,10 +232,23 @@ final class ModdedGenerationHistoryStorage {
        );
    }
-    static ActivePack resolveActive(GenerationHistory history) throws IOException {
+    static GenerationRegistryContractFactory.CustomBiomeAliasPolicy adoptionAliasPolicy(Path dimensionRoot)
            throws IOException {
        Path regions = dimensionRoot.resolve("region");
        if (!Files.isDirectory(regions)) {
            return GenerationRegistryContractFactory.CustomBiomeAliasPolicy.CONTENT_ADDRESSED_ONLY;
        }
        try (Stream<Path> files = Files.list(regions)) {
            return files.anyMatch((Path file) -> file.getFileName().toString().endsWith(".mca"))
                    ? GenerationRegistryContractFactory.CustomBiomeAliasPolicy.RETAIN_LEGACY_ALIASES
                    : GenerationRegistryContractFactory.CustomBiomeAliasPolicy.CONTENT_ADDRESSED_ONLY;
        }
    }
    static ActivePack resolveActive(GenerationHistory history, Path validatedSource) throws IOException {
        GenerationEpoch epoch = history.activeEpoch();
        Path packRoot = normalize(history.activePackRoot());
-        validatePack(packRoot);
+        validatePack(packRoot, validatedSource);
        validateDimension(packRoot, epoch);
        return new ActivePack(
                packRoot,
@@ -183,9 +258,12 @@ final class ModdedGenerationHistoryStorage {
        );
    }
-    static PackValidationResult validatePack(Path packRoot) {
+    static PackValidationResult validatePack(Path packRoot, Path validatedSource) {
-        PackValidationResult validation = PackValidationRegistry.getMatching(
+        String contentFingerprint = PackFingerprints.computePackTreeFingerprint(packRoot.toFile());
-                packRoot, PackFingerprints.computePackTreeFingerprint(packRoot.toFile()));
+        PackValidationResult validation = PackValidationRegistry.getMatching(packRoot, contentFingerprint);
        if (validation == null && validatedSource != null) {
            validation = PackValidationRegistry.publishMatchingCopy(validatedSource, packRoot, contentFingerprint);
        }
        if (validation == null) {
            validation = ModdedStartup.validatePack(packRoot.toFile());
        }
@@ -246,10 +324,9 @@ final class ModdedGenerationHistoryStorage {
            PlatformGenerationRegistry generationRegistry = IrisPlatforms.get()
                    .registries()
                    .generationRegistry();
-            String dimensionTypeKey = generationRegistry.dimensionTypeResourceKey(
+            String dimensionTypeKey = dimension.dimensionTypeResourceKey(
-                    source.getFileName().toString(),
+                    generationRegistry,
-                    dimension.getLoadKey(),
+                    source.getFileName().toString()
                    dimension.getDimensionTypeKey()
            );
            GenerationEpoch.DimensionContract dimensionContract = GenerationEpochContractFactory.create(
                    dimension,
@@ -273,6 +350,11 @@ final class ModdedGenerationHistoryStorage {
        return normalize(ModdedWorldEngines.resolvePack(pack, dimensionKey).toPath());
    }
    private static Path installedPackSource(String pack) {
        File folder = ModdedWorldEngines.packFolder(pack);
        return folder.isDirectory() ? normalize(folder.toPath()) : null;
    }
    private static GenerationRegistryContract requireRegistryDefinitions(
            Collection<GenerationRegistryContract> contracts
    )
@@ -333,6 +415,13 @@ final class ModdedGenerationHistoryStorage {
        }
    }
    record PreparedHistory(ActivePack active, GenerationAdmission.RuntimeLease lease) {
        PreparedHistory {
            active = Objects.requireNonNull(active, "active");
            lease = Objects.requireNonNull(lease, "lease");
        }
    }
    record Candidate(
            String packFingerprint,
            GenerationEpoch.DimensionContract dimensionContract,
@@ -46,6 +46,11 @@ final class ModdedGenerationRegistry implements PlatformGenerationRegistry {
        );
    }
    @Override
    public boolean supportsBorrowedDimensionTypes() {
        return true;
    }
    @Override
    public Definition definition(String registryKey, String resourceKey) {
        return nativeRegistry.definition(registryKey, resourceKey);
@@ -14,6 +14,7 @@ public final class ModdedLifecycleCallbacks {
        return new NativeModdedCallbacks(
                ModdedEngineBootstrap::serverAboutToStart,
                ModdedEngineBootstrap::start,
                ModdedEngineBootstrap::levelsReady,
                ModdedEngineBootstrap::serverStarted,
                ModdedEngineBootstrap::stop,
                ModdedEngineBootstrap::stopped,
		`@@ -0,0 +1 @@`
							`rootProject.name = 'iris-craftengine-native-fixture'`