journal(prevb): M1 code green (unit+lint); discourse main-tip e2e in flight

machine-docs/JOURNAL-prevb.md

@@ -35,3 +35,18 @@ sidekiq dropped). So discourse needs NO `previous/`; the env overlay shrinks to
   discourse-migration context; the normal/discourse path is now hardcode-free. Recorded in DECISIONS.
 - *`previous/` scoped to last-green (published-version) base only* — version-guarded by a declared target;
   on a main-tip base or version mismatch it is skipped + flagged stale. Discourse ships none (base deploys clean).
+
+## 2026-06-17T00:30Z — M1 code done (unit+lint green); discourse e2e launched
+
+Implemented B1–B4 (commit bb2e3c6): resolve_upgrade_base/BasePlan, deploy_app base_ref+apply_previous,
+previous/ surface in lifecycle, generic.perform_upgrade strip, discourse migration, unit tests.
+Unit: 88 relevant pass (full suite 283 pass; 1 PRE-EXISTING unrelated fail
+`test_warm_reconcile::test_traefik_spec_is_stateless_with_setup` KeyError 'health_domain' — fails on
+clean HEAD, not mine; flagged for Adversary). Lint PASS.
+
+B5 e2e launched on cc-ci (/root/prevb-deploy @ bb2e3c6), STAGES=install,upgrade, discourse PR#4
+(REF=ae5a8180, SRC=recipe-maintainers/discourse). First log lines confirm the core mechanism:
+`== upgrade base: kind=ref ref=f87c612d71b4 (target-branch (main) tip)` → base = main-tip chaos deploy
+(bitnamilegacy:3.5.0), env overlay provided. Base now in slow Rails cold boot (15-25min). Polling ~5min.
+(lint rung fail R011 = recipe-level, a rung not a gate; prepull skipped on the known sidekiq-depends-on
+config rc=15 — non-fatal.)