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

machine-docs/DEFERRED.md

@@ -343,6 +343,27 @@ before the build is called done) — but does **not** force closure.
   retry+backoff / drop `2>/dev/null` / `set +e` w/ fallback), then runs plausible-full green + claims.
 - **Linked:** REVIEW-2 `e850281` (root-cause + DENY), `71af595` (§4.3 floor); DECISIONS 2026-05-30.
 - [RE-ENTERED @2026-06-11 → phase `dstamp` (cc-ci-plan/plan-phase-dstamp-discourse-drift.md)] discourse upgrade-HC1 @7ae7b0f stamps prev-base tag commit (eb96de94+U) on BOTH old+new harness since ~06-10 (baseline 184 was L4 on 06-05); harness-neutral (rcust exonerated, M2-closed) but abra stamp-resolution mechanism UNATTRIBUTED — worth a standalone dig outside rcust. Evidence: /var/lib/cc-ci-runs/{m2p-discourse,ab-discourse-7ae7b0f-oldmain}, JOURNAL-rcust 2026-06-11.
+  - ✅ **RESOLVED @2026-06-11 (phase `dstamp`, Builder).** NOT an abra stamp-resolution bug — abra
+    stamps the PR head `7ae7b0f7+U` CORRECTLY (proven: repro2 `--debug` line + 3 bail-at-secrets
+    repros; per-run git HEAD=7ae7b0f at deploy, reflog-verified). **Root cause:** discourse
+    `compose.yml` app service `deploy.update_config: { failure_action: rollback, order: start-first,
+    monitor: 5s }`. On the upgrade chaos redeploy, start-first co-resides OLD+NEW (~2× memory) for
+    the precompile/Rails-heavy app; under host memory pressure the NEW task fails swarm's 5s update
+    monitor → `failure_action: rollback` reverts the app service to PreviousSpec, including the
+    `chaos-version` label (head→base `eb96de94+U`). start-first kept the old task serving so
+    `wait_healthy` passed; HC1 then read the reverted base commit and misreported it as a stamp
+    mismatch. **Direct evidence:** `/var/lib/cc-ci-runs/dstamp-repro4.console.log` — post-redeploy
+    `UpdateStatus.State=updating`, `.Spec chaos-version=7ae7b0f7+U` (head applied), `.PreviousSpec
+    chaos-version=eb96de94+U` (base); the read after the rollback = base. **Fix (commits 0cc31a5 +
+    e9c26c7):** (1) `tests/discourse/compose.ccci.yml` app `update_config.order: stop-first` (new
+    task boots with full memory → no OOM → no spurious rollback; `failure_action: rollback` left
+    intact); (2) general `lifecycle.assert_upgrade_converged` (2-phase StartedAt protocol) detects a
+    swarm rollback/pause and fails the upgrade HONESTLY — HC1 commit-match unchanged, unweakened.
+    **Proven in real CI:** drone `!testme` build **#450** (discourse @7ae7b0f, cc-ci main 2da1f01) =
+    **LEVEL 5**, all tiers PASS (install/upgrade/backup/restore/custom), clean_teardown + no_secret_leak
+    true; PR recipe-maintainers/discourse#2 comment shows ✅ passed. **Blast-radius:** only discourse
+    affected (keycloak/n8n have the same policy but upgrade-PASS L4 across runs; drone/traefik infra);
+    the harness guard covers all rollback-policy recipes. M1+M2 evidence: STATUS-/JOURNAL-/REVIEW-dstamp.
 - [RE-ENTERED @2026-06-11 → phase `bsky`] ✅ **RESOLVED @2026-06-11 (phase bsky, Builder):** root cause = upstream republishes the MOVING tag `:0.4` with main-branch builds (now @atproto/pds 0.5.1, Node 24, `/app/index.ts` — no `index.js`), breaking the recipe's entrypoint override. Fix PR open (operator merges): **recipe-maintainers/bluesky-pds PR #2** (`upgrade-0.3.0+v0.4.219`, head f7b6c8df — exact-pin `0.4.219` + version-label bump). Proven green at PR head via real drone CI: run 427 **level 5** (install/backup_restore/functional/lint PASS; upgrade = declared intentional skip — no deployable published base, both old tags pin the republished `:0.4`; negative control run 423). Screenshot real (PDS landing page). The shot-phase deploy-gated N/A is lifted on the PR runs. Upstream registry: cc-ci-plan/upstream/bluesky-pds.md; decisions: DECISIONS.md 2026-06-11 (pin choice + EXPECTED_NA-upgrade base suppression). Both the re-pin follow-up AND the rcust M2 exclusion note are hereby closed with these pointers. Original entry follows: bluesky-pds: UPSTREAM IMAGE BREAKAGE (non-rcust, M2-justified exclusion from baseline match).
   The app container crash-loops `Error: Cannot find module '/app/index.js'` (MODULE_NOT_FOUND,
   Node v24.15.0) under the recipe's pinned tag on EVERY current run — new main @ mirror head