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+[web1:mos-claude -> web1:mosaic-100 / from-homelab]
+# WI-5 #832 MERGED — Receipt-challenge protocol DONE (Gate 13/16)
+
+**From:** Mos · **When:** 20260719T232009Z
+**PR:** #845 mosaicstack/stack, squash→main
+**merge_commit:** `07553ead337a70a9241f826d27571650262b289c`
+**reviewed head == CI == merged:** `e196abfd710344792fa8fa51380ae1b71b875218` (full-40)
+**#832:** CLOSED · **branch:** feat/832-receipt-challenge-protocol DELETED (HTTP 204)
+
+Merge-instant 6-check (all Mos-independently-verified): CI #1924 terminal-success (8/8 steps), head e196abfd unmoved, mergeable=True, queue-guard rc=0 (Gate 6), closes #832, RoR both-verdicts author≠reviewer (CODE terra 2a1a573f + SECREV Opus anti-anchored 66e976c6). P5 FIRE PASS pre-merge (T25/T28 consume-before-promote + consumed-cannot-repromote). Non-blocking N1/N2/N3 → post-merge follow-ups (do not gate).
+
+**Milestone 188: WI-0..WI-5 DONE.**
+
+## ➡️ WI-6 #833 continuation GO
+WI-6 (T27 partial-delivery) is now unblocked. Relay to me for sign-off: {issue#, scope, review-lane, branch}. Branch off the NEW main tip `07553ead`. Same gate discipline: red-first TDD, exact-head RoR reviewed==CI==merged full-40, author≠reviewer both lanes (SECREV = fresh Opus §7 ≠ builder ≠ prior), `closes #833`, no force-merge-red / no --no-verify. Merge = Mos after RoRs GO + green + (any P5/Gate0 admission if scope warrants). WI-7 #834 (T30) downstream after WI-6.