chore: refresh check-repo-meta.py docstring (Phase 0 closed)

tools/check-repo-meta.py

@@ -1,5 +1,5 @@
 #!/usr/bin/env python3
-"""Phase 0 manifest drift gate for dist/repo.meta.json.
+"""Per-repo manifest drift gate for dist/repo.meta.json.
 
 Validates that:
   1. The given manifest file parses as JSON and conforms to its
@@ -9,10 +9,11 @@
 
 Exits 0 on success; non-zero with structured stderr output on failure.
 
-This is the per-repo local mirror of `.github/profile/build/validate-repo-meta.py`
-(Track A / Phase 0 plan §2). Once the org-level validator is published,
-this script may delegate to it via URL; for now it carries an inline
-copy so the gate is self-contained.
+Self-contained mirror of the canonical validator at
+`.github/profile/build/validate-repo-meta.py`. Self-containment keeps
+`make check-manifest` runnable without an extra checkout or network
+detour while CI / smoke tests run the canonical script against the
+published manifests.
 """
 
 from __future__ import annotations
@@ -30,15 +31,17 @@
 
 
 def _load_schema(schema_uri: str, repo_root: Path) -> dict:
-    """Load the schema from URL or, if the canonical URL is unreachable,
-    fall back to a sibling .github checkout under the org parent dir."""
+    """Load the schema from `schema_uri`. If the network is unavailable,
+    fall back to a sibling `.github` checkout under the same parent dir
+    (the canonical layout for a dev box with multiple m-dev-tools repos
+    checked out side by side)."""
     try:
         with urllib.request.urlopen(schema_uri, timeout=5) as resp:
             return json.load(resp)
     except Exception as e:  # noqa: BLE001
         sys.stderr.write(
             f"NOTE: could not fetch schema from {schema_uri} ({e}); "
-            "trying local fallback at ../.github/profile/repo.meta.schema.json\n"
+            "falling back to sibling .github checkout\n"
         )
         fallback = repo_root.parent / ".github" / "profile" / "repo.meta.schema.json"
         if not fallback.exists():