Search across ALL of the user's personal knowledge sources at once — project-memory, Claude session transcripts, insight-vault, nokta-vault, daily-report — with one query. Use when the user asks "what do I know about X", "find that thing about Y", "have we discussed Z before", "what did we decide about ...", "recall ...", or any cross-source recall question. Backed by the `kb` CLI which maintains a unified SQLite FTS5 index at ~/.claude/kb/kb.db. Always check `kb status` to confirm the index is fresh, and offer to run `kb sync` if stale (>1 day).
