2cbf0631a5
When fast returns hits whose snippets all look like the same keywords echoing (because the searched topic IS the subject of those sessions — e.g. searching 'session_search' in sessions about session_search), the snippets are decorative, not signal. The temptation is to pivot to find/grep/raw SQL — same shape failure as reflexive summary, just with manual archaeology instead of LLM telephone. New schema section instructs: don't pivot, drill. bookend_end carries the session's prose resolution that the snippets routinely miss. Observed failure that motivated this: an assistant asked to find a recently-drafted PR body got fast results with the right session in the top 5, but the snippets were wall-to-wall '>>>session_search<<<' markers, so it pivoted to find/sqlite3 and burned ~10 minutes. The right session's bookend_end contained 'Draft written to <path>' — exactly the artefact being searched for. No behavioural change; schema-only. 106/106 passing.