The global daemon registry (~/.beads/registry.json) could be corrupted
when multiple daemons from different workspaces wrote simultaneously.
Changes:
- Add file locking (flock) for cross-process synchronization
- Use atomic writes (temp file + rename) to prevent partial writes
- Keep entire read-modify-write cycle under single lock
- Add FlockExclusiveBlocking and FlockUnlock to lockfile package
This prevents race conditions that caused JSON corruption like `]]`.
🤖 Generated with [Claude Code](https://claude.com/claude-code)
Co-Authored-By: Claude <noreply@anthropic.com>
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