Pinscope open-source core

Agentic schematic validation: datasheet extraction via Claude Console
Skills, netlist/BOM design graph, per-IC direct datasheet review with
page citations, capacitor derating, Next.js report UI.

Extracted from the Pinscope cloud codebase. Auth and billing live in the
private gateway repo behind stable seams (billing_hook.py, adapter files
listed in CLAUDE.md).

scripts/gc_orphan_blobs.py

@@ -0,0 +1,60 @@
+#!/usr/bin/env python3
+"""Remove orphan datasheet blobs not referenced by any ref or pattern.
+
+Works with both LocalStorageBackend and GCSStorageBackend depending on
+whether GCS_BUCKET is set.
+
+Usage:
+    # Dry run (default) -- shows what would be deleted
+    python -m scripts.gc_orphan_blobs
+
+    # Actually delete
+    python -m scripts.gc_orphan_blobs --apply
+"""
+
+from __future__ import annotations
+
+import argparse
+
+
+def get_storage():
+    from backend.config import settings
+
+    if settings.gcs_bucket:
+        from backend.services.storage_gcs import GCSStorageBackend
+        return GCSStorageBackend(settings.gcs_bucket)
+    else:
+        from backend.services.storage import LocalStorageBackend
+        return LocalStorageBackend(settings.data_dir)
+
+
+def main():
+    parser = argparse.ArgumentParser(description="Remove orphan datasheet blobs")
+    parser.add_argument("--apply", action="store_true", help="Actually delete (default is dry run)")
+    args = parser.parse_args()
+
+    storage = get_storage()
+    print(f"Storage backend: {type(storage).__name__}")
+
+    from backend.services.datasheet_store import gc_orphan_blobs
+
+    orphans = gc_orphan_blobs(storage, dry_run=not args.apply)
+
+    if not orphans:
+        print("No orphan blobs found")
+        return
+
+    for bk in orphans:
+        prefix = "  DELETE" if args.apply else "  WOULD DELETE"
+        print(f"{prefix}  {bk}")
+
+    print()
+    if args.apply:
+        print(f"Deleted {len(orphans)} orphan blob(s)")
+    else:
+        print(f"Dry run: {len(orphans)} orphan blob(s) would be deleted")
+        print("Run with --apply to execute")
+
+
+if __name__ == "__main__":
+    main()