1. Add _extract_core_subject() to strip noise words before X search
- X search is literal keyword matching, not semantic
- "best open claw usecases" → "open claw" (27 results vs 0)
2. Fix ISO date detection bug
- Was: if "T" in created_at (matched "Tue" in "Tue Feb 03...")
- Now: if created_at[10] == "T" (proper ISO separator check)
- Dates now parse correctly: (2026-02-03) instead of (date unknown)
Co-Authored-By: Claude Opus 4.5 <noreply@anthropic.com>
Matt Van Horn
e7610ddcac