Slice 4 shipped (R-448/R-443/R-439 CLOSED, proven live); R-472..R-476; the floor-between-bakes claim corrected

Controller v0.237.0-v0.238.1: the Update button is a guarded job — refusals, backup-first when the
proven Tier-2 copy is stale, safety dump, pin, pull (pin back on failure), health, HOLD on failure.
Proven live on demo-hp: A, B, E, F, H and the restore walk (audits/slice4-2026-09-13/).

Correction to this morning's pages: between golden bakes the hub HOLDS a floor above the vouched
golden, so a release does not reach the fleet by floor (R-472, operator decision). Corrected in the
runbook, STATUS, CONTEXT, R-468 and the gate docstring.

Claude-Session: https://claude.ai/code/session_0159rPz1ZhFKsS53msqPYxtS

documentation/architecture/00-capability-map.md

@@ -100,6 +100,7 @@ likewise silent. Evidence: `audits/DRILL-r361-2026-08-22/evidence/06-part3-decis
 |---|---|---|---|---|
 | Deploy an app from the catalog (env config, memory guard, health-aware progress) | controller, catalog (~52 apps, images pinned) | **PROVEN-LIVE** | `CAMPAIGN-2` T-DEPLOY-SET (7 apps, env config, health-aware); `RERUN-p1p3` (×4 PASS) | Memory-guard FIRING is not live-shown (T-RES-MEMGUARD never fired: ample RAM / auth-walled) — implemented + unit-level only |
 | App lifecycle: start/stop/restart/update/logs/remove/redeploy | controller | **PROVEN-LIVE — the ACTIONS work. NARROWED 2026-09-13: `CAMPAIGN-3` proved `remove` removes the APP, not the DATA — the "delete my data" half was INERT on every box until controller v0.236.0 (R-442). RE-PROVEN 2026-09-13 on demo-hp: data written by the app itself (63 MB) gone after removal and listed; an unresolvable data location is REFUSED (409) with the app kept; an SSD app gets `[]` and a note.** | `CAMPAIGN-2` T-LIFECYCLE (stop/start/restart/update/logs); remove (app only) live in `CAMPAIGN-3`; **remove WITH data: `audits/R442-2026-09-13/`**; **data behaviour: `audits/SPIKE-app-update-2026-09-01.md` (2026-09-01)** | Redeploy-after-remove edge remains open (T-REMOVE-REDEPLOY never cleanly passed — stale dryrun journal); non-pilot-critical |
+| **Update is GUARDED: it refuses without a restorable backup, backs up first when the copy is stale, and HOLDS an app that does not come up** | controller **v0.237.0 + v0.238.0 + v0.238.1** | **PROVEN-LIVE (2026-09-13)** — scenarios A (real upgrade, success only after health), B (stale copy → backup first), E (pull failure → pin back, app untouched), F (never healthy → held, hold text on API and page), H (start/restart/update and the boot sweep all refuse the held app) and **the restore walk** (Mentések unit restore → back on the old version, hold cleared), on demo-hp with a throwaway app | **`audits/slice4-2026-09-13/`** (live/, redproofs/, gates/); design `architecture/09-update-architecture.md` §6.1 | **Tier-2-only precondition** — an app with no Tier-2 copy cannot be updated (R-475); no automatic rollback, by measurement; a release does not reach the fleet by floor between golden bakes (R-472) |
 | **What `restart` and `update` do to a deployed app whose compose file the catalog already moved** | controller **v0.235.0** | **CHANGED 2026-09-06 — they NO LONGER upgrade it.** The row below records what shipped; this text records what it replaced, because every box under v0.235.0 still behaves the old way. **Up to v0.234.0: PROVEN-LIVE (2026-09-01) — they UPGRADE it.** Every lifecycle action ends in `docker compose up -d`, which makes the container match the file and PULLS the image itself when it is missing (measured: 18.3 s with a pull, 0.5 s without; negative control with an unchanged file did not even recreate the container). This is DELIBERATE on the restart path — `Manager.RestartStack` says so in a comment — but the syncer moves the file under a deployed app on a 15-minute cycle with no deployed check (R-438), and NOTHING tells the customer. | `audits/SPIKE-app-update-2026-09-01.md` §2, §3 | **No safety copy is taken by any of them** — `writeSafetyDump` is DATABASE-ONLY and is not on the update path at all. R-438, R-440, R-443. |
 | **Whether the box UPGRADES an app by itself, with nobody pressing anything** | controller | **PROVEN-LIVE (2026-09-01) — YES, but only when an app fails to come back.** A plain power cut does NOT upgrade: Docker's `restart: unless-stopped` restores the old containers and the reconciler logs `no boot-orphaned apps (nothing to start)`. When an app does NOT return, `Reconciler.Run` (`bootrecon.go:269`) calls `StartStack` -> `compose up -d` and the app comes back on the NEW version, unattended (measured). **13 non-API call sites across 9 files reach `up -d` this way** — not the five previously believed. | `audits/SPIKE-app-update-2026-09-01.md` §2, §8 | The drive-return gate (`intermediary.go:222`) and `AppStopGuard.Recover` (`appstop_marker.go:283`) call the same function; located by reading, **not exercised live** — stated as such. |
 | **Whether an app UPGRADE can be undone** | controller + catalog | **PROVEN-LIVE (2026-09-01) — NO, and "rollback" is the wrong word for it.** Once a migration has RUN, putting the old image tag back yields a container that refuses to start: Nextcloud — *"the version of the data (32.0.9.2) is higher than the docker image version (31.0.14.1) and downgrading is not supported"*. A 3-major jump is refused outright (*"only possible to upgrade one major version at a time"*) and IS recoverable, precisely because nothing migrated. Positive control: the data is not destroyed — returning to 32.0.9 restored both seeded markers byte-identical. | `audits/SPIKE-app-update-2026-09-01.md` §7 | The only route back is restoring DATA from a copy taken BEFORE the update — which no update path takes. And a restore's image-level rollback is itself overwritten by the syncer within 15 minutes (R-441). R-40 is confirmed live by the same measurement. |