15 tasks covering domain (kebab-core SearchHit + AnswerCitation), config (SearchCfg.stale_threshold_days), retrievers (lexical + vector JOIN documents.updated_at), App facade (staleness module + cache re-stamp), wire schema, CLI plain [stale] tag, TUI [STALE] Warning badge, snapshot fan-out, docs. Co-Authored-By: Claude Opus 4.7 (1M context) <noreply@anthropic.com>