diff --git a/MANIFEST.in b/MANIFEST.in
index 3f91b377..fa623998 100644
--- a/MANIFEST.in
+++ b/MANIFEST.in
@@ -4,5 +4,9 @@ include LICENSE
 recursive-include src/adcp py.typed
 # Bundled AdCP JSON schemas. ``scripts/bundle_schemas.py`` mirrors
 # ``schemas/cache/`` into ``src/adcp/_schemas/`` before ``python -m
-# build`` so the validator ships with the wheel.
-recursive-include src/adcp/_schemas *.json
+# build`` so the validator ships with the wheel. Keep distributions on
+# stable supported bundles; historical prerelease caches are dev-only.
+recursive-include src/adcp/_schemas/2.5 *.json
+recursive-include src/adcp/_schemas/3.0 *.json
+recursive-include src/adcp/_schemas/3.1 *.json
+prune src/adcp/_schemas/3.1.0-*
diff --git a/pyproject.toml b/pyproject.toml
index 8ef40a50..a77fb20e 100644
--- a/pyproject.toml
+++ b/pyproject.toml
@@ -180,7 +180,9 @@ adcp = [
     # AdCP JSON schemas, mirrored from ``schemas/cache/`` by
     # ``scripts/bundle_schemas.py`` so the wheel ships them for
     # ``adcp.validation.schema_loader``.
-    "_schemas/**/*.json",
+    "_schemas/2.5/**/*.json",
+    "_schemas/3.0/**/*.json",
+    "_schemas/3.1/**/*.json",
     # Vendored canonical-formats reference fixtures (14 v2 products +
     # 50-entry v1 catalog) so :mod:`adcp.canonical_formats.fixtures`
     # can serve them to adopter test suites without forcing each
@@ -191,6 +193,12 @@ adcp = [
 # These live in src/adcp/schemas/ and are loaded via adcp.schemas.load_schema.
 "adcp.schemas" = ["*.json"]
 
+[tool.setuptools.exclude-package-data]
+adcp = [
+    "_schemas/3.1.0-*/*.json",
+    "_schemas/3.1.0-*/**/*.json",
+]
+
 [tool.black]
 line-length = 100
 target-version = ["py310", "py311", "py312"]