777genius/claude-notifications-go v1.6.2

v1.6.2 - Race condition fix

on GitHub

Fixed 🔒

Race condition in content-based deduplication

Stop and Notification hooks were running simultaneously, both passing the duplicate check before either could save state. This caused duplicate notifications with nearly identical content.

Solution

• Added shared content lock (AcquireContentLock/ReleaseContentLock)
• Serializes duplicate check and state update across all hook types
• Now only one hook can check and save notification state at a time
• Uses file-based locking with 5s TTL for cross-process synchronization

Technical Details

• New methods in internal/dedup/dedup.go:
  • AcquireContentLock(sessionID) - acquires shared lock
  • ReleaseContentLock(sessionID) - releases shared lock
• Lock file: /tmp/claude-notification-{sessionID}-content.lock
• Graceful fallback: if lock acquisition fails, continues without lock (prefers duplicate risk over missed notification)

Full Changelog: v1.6.1...v1.6.2