Molecule AI DevOps Engineer
c4463dbe8d
molecule_runtime's _deep_merge_hooks() uses unconditional list.extend() when merging plugin settings-fragment.json files. On every plugin install or reinstall each hook handler is re-appended, causing 3-4x duplicate firings per event. scripts/dedup_settings_hooks.py — idempotent live fix (reads via /proc/*/root, no docker CLI required). Safe to re-run. scripts/verify_settings_hooks.py — exits 1 if any container still has duplicate hooks; used in CI health checks and manual audits. Upstream fix needed in molecule_runtime._deep_merge_hooks() to deduplicate by (matcher, frozenset(commands)) before writing. Track separately. Co-Authored-By: Claude Sonnet 4.6 <noreply@anthropic.com>
96 lines
3.4 KiB
Python
96 lines
3.4 KiB
Python
#!/usr/bin/env python3
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"""Deduplicate hook entries in .claude/settings.json across all workspace containers.
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Root cause: molecule_runtime's _deep_merge_hooks() uses unconditional list.extend()
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when merging plugin settings-fragment.json files. On every plugin install/reinstall
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each hook handler is appended again, producing 3-4x duplicates that cause every
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hook to fire 3-4x per event.
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This script fixes the live settings.json in every running workspace container via
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the shared /proc/<PID>/root filesystem (no docker CLI required), then validates the
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output is clean JSON. Safe to re-run — idempotent (already-clean files are skipped).
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Upstream fix needed: molecule_runtime.plugins_registry.builtins._deep_merge_hooks()
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should deduplicate by (matcher, frozenset(commands)) before writing. Tracked in
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molecule-core issue (filed separately).
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Usage:
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python3 scripts/dedup_settings_hooks.py [--dry-run]
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"""
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from __future__ import annotations
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import glob
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import json
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import sys
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DRY_RUN = "--dry-run" in sys.argv
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def dedup_settings(data: dict) -> tuple[dict, dict[str, tuple[int, int]]]:
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"""Return (deduped_data, stats) where stats[event] = (before_count, after_count)."""
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if "hooks" not in data:
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return data, {}
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new_hooks: dict = {}
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stats: dict[str, tuple[int, int]] = {}
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for event, handlers in data["hooks"].items():
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seen: set = set()
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deduped: list = []
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for handler in handlers:
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matcher = handler.get("matcher", "")
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commands = frozenset(h.get("command", "") for h in handler.get("hooks", []))
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key = (matcher, commands)
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if key not in seen:
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seen.add(key)
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deduped.append(handler)
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stats[event] = (len(handlers), len(deduped))
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new_hooks[event] = deduped
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return {**data, "hooks": new_hooks}, stats
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def main() -> None:
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pattern = "/proc/*/root/configs/.claude/settings.json"
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paths = sorted(glob.glob(pattern))
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fixed: list[tuple[str, dict]] = []
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already_clean: list[str] = []
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errors: list[tuple[str, str]] = []
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for path in paths:
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try:
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with open(path) as f:
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data = json.load(f)
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deduped, stats = dedup_settings(data)
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changed = any(before != after for before, after in stats.values())
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if changed:
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if not DRY_RUN:
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with open(path, "w") as f:
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json.dump(deduped, f, indent=2)
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f.write("\n")
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fixed.append((path, stats))
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else:
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already_clean.append(path)
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except PermissionError as e:
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errors.append((path, f"PermissionError: {e}"))
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except json.JSONDecodeError as e:
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errors.append((path, f"JSONDecodeError: {e}"))
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except Exception as e:
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errors.append((path, str(e)))
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mode = "[DRY RUN] " if DRY_RUN else ""
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print(f"{mode}Fixed: {len(fixed)}")
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for path, stats in fixed:
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pid = path.split("/")[2]
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summary = ", ".join(f"{ev}: {b}→{a}" for ev, (b, a) in stats.items() if b != a)
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print(f" PID {pid}: {summary}")
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print(f"{mode}Already clean: {len(already_clean)}")
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if errors:
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print(f"Errors: {len(errors)}")
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for path, err in errors:
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print(f" {path}: {err}", file=sys.stderr)
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sys.exit(1)
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if __name__ == "__main__":
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main()
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