`[2026-07-17]` **`mark_superseded` verb SHIPPED + live-verified (v0.20.15, `be2c577`) — WT #364 durable retirement lands on our store; #364 CLOSED end-to-end both sides.** Implemented the sole supersession verb #364 calls (mirrors reference; `_is_live` INV-011 excludes retired chunks from scan); bundled bifrost 1.1.4 hasattr backstop. Re-verify: negatives retired via mark_superseded (not recency); Sindra durably recalls the name. Residual `cbbc7bdd` phrasing → WT #367 (worldtree-owned). Detail: `persistent-memory.d/2026-07-16-wt364-r39-name-recall.md` + `…person-prime-scan-shipped.md`.
