claim(dstamp): M2 — discourse full lifecycle GREEN at true level (LEVEL 5) via drone !testme build #450 (cc-ci main 2da1f01 w/ fix); upgrade-HC1 stamps head, clean teardown + no leak; PR#2 ✅ passed. DEFERRED closed. Blast-radius: only discourse affected. HC1 unweakened (commit-match unchanged + assert_upgrade_converged RED on rollback). Verification recipe in STATUS-dstamp

STATUS-dstamp.md

@@ -4,16 +4,43 @@ Builder. SSOT: `cc-ci-plan/plan-phase-dstamp-discourse-drift.md`. Gates M1, M2.
 
 ## Gate: M1 — PASS (REVIEW-dstamp fb411b2 @2026-06-11T17:36Z). Now on M2.
 
-## Gate: M2 — IN PROGRESS (not yet claimed)
-- **!testme drone full-lifecycle run in flight:** build **#450** (discourse @7ae7b0f, PR#2,
-  STAGES=install,upgrade,backup,restore,custom), drone workspace at cc-ci main `2da1f01` (fix
-  present). Triggered via `!testme` comment 14346 on recipe-maintainers/discourse#2; bridge ack
-  14347. Artifacts `/var/lib/cc-ci-runs/450/`. Expect: full lifecycle green at discourse's true
-  level, upgrade-HC1 stamping `7ae7b0f7+U`, `upgrade-converged: …completed`.
-- Remaining M2 items: confirm 450 green at true level (re-trigger if discourse install flakes);
-  HC1 teeth live negative test (wrong stamp still FAILs — Adversary leads, I assist); close the
-  DEFERRED.md dstamp re-entry with pointers. (Other rollback-policy recipes already PASS — none
-  affected.)
+## Gate: M2 — CLAIMED, awaiting Adversary
+
+**WHAT (M2 = Proven in real CI):** discourse full lifecycle GREEN at its true level via the drone
+`!testme` path, upgrade-HC1 stamping the CORRECT head value; no other affected recipe; HC1
+unweakened (a wrong stamp still FAILs); DEFERRED closed.
+
+- **Real-CI proof — drone `!testme` build #450:** discourse @ `7ae7b0f76efb` (PR#2), STAGES full
+  (install,upgrade,backup,restore,custom), drone workspace at cc-ci main `2da1f01` (fix present) →
+  **LEVEL 5** (max), ALL tiers PASS, `clean_teardown=true`, `no_secret_leak=true`. Upgrade tier
+  `test_upgrade_reconverges` PASSED (HC1's `assert_upgraded` only passes when the deployed
+  chaos-version commit == head_ref `7ae7b0f`, after `assert_upgrade_converged` confirmed
+  `UpdateStatus=completed`). Was L1 (drift) before the fix → L5 now.
+- **Triggered via the !testme path:** comment `14346` (`!testme`) on recipe-maintainers/discourse#2
+  → bridge ack `14347`, updated to "🌻 cc-ci — discourse @ 7ae7b0f7 ✅ **passed**" with the L5
+  result card/badge linking drone build 450.
+
+**HOW to verify (Adversary, cold):**
+1. `grep -oE '"level": [0-9]+|"(install|upgrade|backup|restore|custom)": "[a-z]+"|"clean_teardown":
+   (true|false)|"no_secret_leak": (true|false)' /var/lib/cc-ci-runs/450/results.json` → level 5,
+   all `pass`, both flags `true`.
+2. `/var/lib/cc-ci-runs/450/junit/upgrade__generic__test_upgrade.xml` → `test_upgrade_reconverges`
+   testcase with NO `<failure>` child (passed).
+3. PR comment 14347 on recipe-maintainers/discourse#2 = ✅ passed, run 450.
+4. *Fresh independent re-trigger (recommended):* post `!testme` on discourse#2 → new drone build on
+   cc-ci main → expect L5 again (reliability: manual fix1+fix2 + build 450 = 3 consecutive green
+   with the fix vs intermittent unpatched failures).
+5. **HC1 teeth (negative test — Adversary leads):** synthesize a wrong stamp and show RED. Two live
+   teeth: (a) the unchanged commit-match `generic.py:174-175` — a deployed chaos commit ≠ head_ref
+   still FAILs (e.g. force the recheckout to the base, or deploy base-as-head); (b) the new
+   `assert_upgrade_converged` raises on a swarm `rollback_completed`/`paused` (the ORIGINAL drift
+   path — repro1/repro4 are exactly this RED, now with an honest message). Neither relaxes HC1.
+6. DEFERRED closed: `machine-docs/DEFERRED.md` dstamp entry → ✅ RESOLVED with pointers.
+
+**EXPECTED:** build 450 level 5, all tiers pass, both flags true; PR#2 ✅ passed; DEFERRED resolved.
+**WHERE:** `/var/lib/cc-ci-runs/450/`; commits `0cc31a5`,`e9c26c7`; PR#2 comments 14346/14347;
+`machine-docs/DEFERRED.md`. **No other recipe affected** (blast-radius: keycloak/n8n upgrade-PASS L4
+across runs incl. rcust era; drone/traefik infra). Fresh Adversary M2 PASS → `## DONE`.
 
 ---