- Remove CLAUDE_TIMEOUT no-op override — inherit factory default (7200s) from env.sh
- Use anchored grep -qxF "NO_PREDICTIONS" to avoid false early exits
- Fetch closed PRs (state=closed, merged_at filter) instead of open — captures merged activity signals
- Parse staleness age from filename date (YYYY-MM-DD.json) instead of file mtime
- Log a warning when date -d falls back due to non-GNU date
- Add comment explaining global lock serialisation trade-off
Co-Authored-By: Claude Sonnet 4.6 <noreply@anthropic.com>
