`[2026-07-15]` **Cross-session recall failure root-caused → the person-prime `scan` build.** worldtree-dev: WT injects a recalled fact only if combined score (sim×salience) ≥ 0.45 (`auto_inject_combined_score_threshold`) AND recall is per-turn query-gated → moderate-sim durable facts (name ~0.40) never inject. Designed turn-0 fix = WT #349 person-prime (query-less top-N-by-recency injection), capability-gated on the store advertising `updated_at` sort — dark for our provider. Fix = implement the sorted `scan` verb + advertise `sortable_chunk_fields` (ZERO WT change). Contract-first (un-defers bifrost `scan`); skipped heid-contract-review (external spec from worldtree-dev, validated point-for-point). **SHIPPED + deployed + live-verified v0.20.14** → `persistent-memory.d/2026-07-16-person-prime-scan-shipped.md`.
