diff --git a/CONTRIBUTING.md b/CONTRIBUTING.md
index 45d2f1f..65d1e24 100644
--- a/CONTRIBUTING.md
+++ b/CONTRIBUTING.md
@@ -16,23 +16,6 @@ cargo test --workspace
 If you touch S3-backed flows, the CI model uses a local RustFS instance for
 integration tests.
 
-### OpenAPI spec
-
-`openapi.json` is a committed artifact generated from the Utoipa annotations in
-`crates/omnigraph-server`. CI fails if it drifts from the source. To regenerate
-manually:
-
-```bash
-OMNIGRAPH_UPDATE_OPENAPI=1 cargo test -p omnigraph-server --test openapi openapi_spec_is_up_to_date
-```
-
-Optional: enable the project's git hook to regenerate automatically when you
-commit server changes:
-
-```bash
-git config core.hooksPath scripts/hooks
-```
-
 ## Pull Requests
 
 - keep changes focused
diff --git a/scripts/hooks/pre-commit b/scripts/hooks/pre-commit
deleted file mode 100755
index 6fe8d8f..0000000
--- a/scripts/hooks/pre-commit
+++ /dev/null
@@ -1,15 +0,0 @@
-#!/usr/bin/env bash
-# Regenerate openapi.json when the server API surface changes.
-set -euo pipefail
-
-staged=$(git diff --cached --name-only --diff-filter=ACMR)
-
-echo "$staged" | grep -qE '^(crates/omnigraph-server/src/.*\.rs|crates/omnigraph-server/Cargo\.toml)$' || exit 0
-
-echo "[pre-commit] regenerating openapi.json..."
-OMNIGRAPH_UPDATE_OPENAPI=1 cargo test -p omnigraph-server --test openapi openapi_spec_is_up_to_date --quiet
-
-if ! git diff --quiet -- openapi.json; then
-  git add openapi.json
-  echo "[pre-commit] openapi.json updated and staged"
-fi