diff --git a/common/addons/biome-provider-image/README.md b/common/addons/biome-provider-image/README.md
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+# biome-provider-image
+
+Implements and registers the `IMAGE` biome provider, a biome provider which generates
+biomes from an image, using the `color` attribute of biomes.
+
+This addon registers the provider type, and all associated config options.
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diff --git a/common/addons/biome-provider-pipeline/README.md b/common/addons/biome-provider-pipeline/README.md
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+# biome-provider-pipeline
+
+Implements the Biome Pipeline, a procedural biome provider that uses a series
+of "stages" to apply "mutations" to a 2D grid of biomes.
+
+
+This addon registers the `PIPELINE` biome provider type, and all associated configurations.
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diff --git a/common/addons/biome-provider-single/README.md b/common/addons/biome-provider-single/README.md
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+# biome-provider-single
+
+Registers and configures the `SINGLE` biome provider, a biome provider which
+accepts a single biome to generate continuously.
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