- riverTransectProbe renders each surface course as a plan and five cross-sections
- Summary gates ocean writes and spilling channel cells
- Grading columns now report the bank biome
- Skip nib, pothole, wall and slab post passes on river footprints and their collar
- Keep automatic object scatter off the channel and shore band
- Expose deeper biome layers on eroded banks and use the bank biome on the blend band
- Give dry cave headroom the flooded cave biome
- Build surface courses through the valley solver and segment labeler
- Compile surface footprints through the erosion field and index them for cave containment
- Drop the contained-surface fallback and the post-hoc surface rejection passes
- Choose the river profile at the source
- Add the surface package with centerline densification, channel profile, valley head solver and erosion field
- Derive the head from the bank ring outside the channel so every wet cell is contained by construction
- Stamp one continuous cross-section with a cut-scaled blend and a freeboard lip, filtered at the ocean
- Replace hydraulics, ridge tunnel, branching and inset ranges with channel, banks, flow and mouth configs
- Add routing cost weights, underground mouth leveling, bank biomes and bank multiplier
- Map the new schema into planner settings and derive refinement spacing
- Replace the river package with the hydrology planner, footprint compiler, cave containment and runtime
- Add the hydrology pack schema, validator, probes and tests
- Wire hydrology into IrisComplex, actuators, mantle, Vision and commands
