burn-down night: group D design proposals R-518, R-638, R-528 (no code)

Co-Authored-By: Claude Opus 5.5 (1M context) <noreply@anthropic.com>
Claude-Session: https://claude.ai/code/session_0159rPz1ZhFKsS53msqPYxtS

documentation/backlog/OPEN-ITEMS.md

@@ -179,8 +179,8 @@ stopping line that lies.
 | **R-232** | Backup & restore | P2 | **DooPlex's backup makes every copy inside the same box — and nothing tells anyone when it fails.** Surveyed read-only 2026-08-06 (`audits/RECON-dooplex-backup-2026-08-06.md`). **What works:** five sets, 14/14 successful runs in 14 days; a file was restored from the `data` repo and matched the live original **byte for byte**; every set except two is cross-disk; k3s is integrity-checked on every run. **What the matrix exposes, ranked:** (a) **`notify_failure` is a no-op** — `NOTIFY_ON_FAILURE=true` but `NOTIFY_WEBHOOK_URL` is commented out, so a failed backup notifies **nobody**; the project already has a working Resend path that CI uses. Cheapest item, and it makes every other failure visible. (b) **Nothing leaves the box** — no rclone, no remote repo, no off-site target anywhere; Longhorn's target is `nfs://192.168.0.180:` pointing at DooPlex itself, and the only outbound-looking cron pulls *inbound* from Hetzner for a different project. The machine that runs the hub managing the customers' off-site chain has no off-site copy of its own. (c) **The backup tree is a single writable path** and the restic repos are not append-only — one bad script or ransomware destroys every copy at once. (d) **Two same-disk sets**: `.claude-memory` and the PostgreSQL dumps, whose source directory sits *inside* the backup tree. (e) **Longhorn `retain=1`** — one generation per volume, so a corruption noticed a day late has no earlier copy. (f) **`/opt/backup/docs/BACKUP-RESTORE.md` does not exist** though the systemd unit advertises it. (g) **`secrets/restic-repo` has never held a snapshot** — `backup-secrets.sh` contains no `restic` call; the secrets are GPG files on `sda1` only. (h) **No restore has ever been run** beyond today's single-file probe — the matrix's "ever demonstrated?" column is otherwise entirely empty. **Not a finding:** the restic passphrase. The on-box copy is on `sdb1`, a different disk from the backups, and the **operator holds an offline copy out of band** — so a disk loss is recoverable. The narrow residual is that it is operator-held rather than system-held, unlike the customer case's hub-vaulted escrow, so it should be confirmed current and findable by someone else. **Nothing was changed by the recon.** | **NARROWED 2026-10-05 — owner Viktor.** (b) partly: the hub database now leaves DooPlex nightly, encrypted, to ep0 (R-173); everything else in DooPlex's backup still stays on the box. (a) partly: the hub copy alarms through Prometheus (`HubDBBackupStale`); `notify_failure` is still a no-op for the rest. (c)–(h) unchanged. **READY** for the rest | — | — | operator |
 | **R-304** | Backup & restore | P2 | **The retained escrow key works, and the customer is told their correct code is wrong.** DRILL 2026-08-12 answered the three questions separately, on `demo-felhom`, with planted data. **(a) retention: WORKS** — the first retained row in fleet history to carry material (`host_escrow_superseded` id 11, `identity_blob` 572 B), byte-identical (`sha256 a10032341c8584ed…`) to the pre-supersession `host_escrow` row. **(b) the material opens the old store: YES** — unsealed with the OLD recovery code it yielded a password byte-identical to the pre-change one (`sha c60c8bc737a6b7c6…`), and restored three planted files **byte-identical** from a store the box itself could no longer open (negative control first: `Fatal: wrong password or no key found`), **including a Hungarian accented filename verified as raw bytes**. **(c) the customer's route: DOES NOT EXIST, and misinforms.** `ListSupersededEscrow` (`store.go:2841`) is the only reader of a retained `identity_blob` and has **zero production callers** — five call sites, all `_test.go`; the product path (`POST /escrow/recover-offsite-password` → `FetchIdentityEscrow` → `GetHostDRBundle`, `store.go:3152`) selects `FROM host_escrow` — the CURRENT row only. Asked for the old password with the code that demonstrably opens the retained row, the product answered **"the recovery code did not open the sealed bundle — nothing was written"**. **This is the R-224 class again**: there an unreachable hub was reported as a bad code; here a VALID code for retained history is reported as a bad code, and the customer's attempt ends there. **Consequence:** the census answer stands (it was about retention); the countdown banner's promise is true in substance and false in practice; **any capability-map claim that the customer can recover the old history with their recovery code is false today and must move** | **READY (L) — NEW 2026-08-12, RANK 1** | R-198, R-199, R-224, R-241 | Decide the shape: serve retained rows on the recovery path (needs a "which package?" choice — a customer may have several), or stop promising retrieval anywhere the customer cannot perform it. **Until one of those, the honest position is that retention is an operator-only capability.** At minimum, the refusal must stop asserting the code is wrong when the hub simply never looked | operator + CC |
 | **R-366** | Backup & restore | P2 | **The 21 August reinstall orphaned `demo-hp`'s PBS whole-guest archives as well as its off-site repo — the box can no longer read its own pre-reinstall backups, and this surfaces only as a restore-test failure.** Hub event 3016, 2026-08-21 21:59:28Z, unprompted: `Restore-test FAILED on the pbs tier: archive felhom-pbs:backup/ct/9201/2026-08-18T03:58:43Z could not be restored+booted … proxmox-backup-client failed: Error: wrong key - unable to verify signature since manifest's key 3f:4f:65:c0:d8:f3:9f:3c does not match provided key dd:d1:d8:53:44:62:5e:0b`. The archive predates the reinstall by three days. **This is the PBS-tier analogue of R-193** (a guest rebuild mints a fresh secret and orphans the history), and the two together mean a rebuilt box loses BOTH off-premises tiers at once: the restic repo needed a self-heal + re-toggle (see the drill report), and the PBS archives are simply unreadable to it. **Credit: the restore-test caught it and said so precisely** — the mechanism works. **The gap is what it is called:** it is reported as *a restore test that failed*, which reads as a flaky verification, not as *every whole-guest backup you took before the reinstall is unreadable on this machine*. **Found incidentally by the 2026-08-21 backup-truth drill; nobody was looking for it.** | **OPEN — HIGH** | related: R-193 | Establish whether the pre-reinstall PBS archives are recoverable at all (the old key's whereabouts), and separate the two verdicts: a tier whose ARCHIVES ARE ORPHANED is a different alarm from a tier whose restore test failed. Do not close on the strength of the restore-test wording alone. | CC |
-| **R-518** | Backup & restore | P2 | **[P2-MEDIUM] „Mentés most" on the whole-system backup stops every app for about eight minutes while the page promises „csak néhány másodpercre".** MEASURED 2026-09-14 (BIGNIGHT, VM 333, 12 apps): the button's call quiesced all 12 stacks at 19:03:23Z (first stopped 19:03:27Z); the local vzdump ran 19:03:49 → 19:09:59Z; the controller then kept the apps stopped for the second (PBS) tier and restarted them at 19:10:09Z after it failed, the last started 19:11:12Z (`phase4/guest-backup-quiesce-log.txt`) — **≈ 7 m 45 s** with every app answering 404. The page under the button: „Pillanatkép-mód: az alkalmazások csak néhány másodpercre állnak le." A household pressing it at dinner loses every app for the length of the dump, and longer on a bigger box. **Fix shape:** state the real expected downtime (it scales with data), or quiesce per tier and not across a second tier's attempt; do not start a tier whose storage is absent (see R-517). **NARROWED 2026-09-15 (controller v0.243.0 + agent v0.131.0):** a tier whose storage the agent reports absent is skipped before anything stops (`backup_tier_skipped`, once per absence; unknown never skipped), and the button copy now says „általában néhány perc, nagyobb adatnál több". Unit-proven with red-proofs. **Still open:** quiesce per tier, so a slow second tier does not keep every app down. **— NIGHT 2026-09-23 (controller v0.267.0):** the copy half is DONE: the page and the confirm now state the measured stop (≈ 8 minutes on a 12-app box), both languages, red-proofed (`audits/night-2026-09-23/A5-*`). The brief's „csak néhány másodpercre" had already gone in v0.243.0. **Still open:** quiesce per tier, so a slow second tier does not keep every app down. | **READY — P2, narrowed to per-tier quiesce; owner: CC (controller). 2026-10-05: the copy now states today's measurement too (demo-hp, 9 apps, local tier only: 5 min 47 s) — controller v0.296.0, `audits/hub-safety-2026-10-05/partE/`.** | — | — | CC |
-| **R-638** | Backup & restore | P2 | **[P2-MEDIUM] The product's database loader cannot replay a copy over a NEWER schema: on PostgreSQL it FAILS, on MariaDB it leaves the newer version's tables behind.** MEASURED 2026-09-23 on 9202. `ImportDump` (`appbackup/dbdump.go:719`, `psql -v ON_ERROR_STOP=1 --single-transaction`) replays a `pg_dump --clean --if-exists` file over the live database. After docmost 0.95.0 → 0.96.0 migrated, the replay of the pre-update copy was refused in 0.40 s, rc 3: *cannot drop constraint workspaces_pkey on table public.workspaces because other objects depend on it / DETAIL: constraint oauth_clients_workspace_id_fkey …* — the new version created six tables whose foreign keys point at old ones, and `--clean` only drops what the dump knows. Database unchanged (the transaction rolled back). On MariaDB (`mariadb-dump`, `FOREIGN_KEY_CHECKS=0`) the same replay after romm 5.0.0 → 5.3.0 returned rc 0 in 1.25 s and left **12 base tables** of the new version behind; RomM 5.0.0 happened to ignore them. **What worked:** `DROP SCHEMA public CASCADE; CREATE SCHEMA public;` + the dump in ONE transaction — rc 0 in 1.38 s, every table, index and extension back. **Why this is a row of its own and not only part of R-637:** the SAME loader backs shipped paths — `rollbackSafetyDump` (off-site restore's undo) and the dump replay of the restores — so **any restore of a copy taken BEFORE an update that migrated, replayed over the migrated database, may fail the same way. NOT MEASURED:** whether the unit restore the hold sentence names does this (it also carries the data VOLUME tar, which may make the replay moot). That is the measurement owed, on 9202, before anyone relies on it. Evidence: `audits/update-rulings-2026-09-23/README.md` Part 1, `docmost-45`, `romm-44`. **-- NARROWED 2026-09-23:** the undo no longer touches this loader — it copies folders (decision 19, controller v0.263.0). **What stays open is the part about SHIPPED paths:** `rollbackSafetyDump` and the restores' dump replay still replay over whatever schema is live, and whether the unit restore the hold sentence names works after a real schema migration is STILL UNMEASURED. | **OPEN — P2, narrowed to the restore paths; owner: CC; measure the named restore after a real schema migration first** | — | — | CC |
+| **R-518** | Backup & restore | P2 | **[P2-MEDIUM] „Mentés most" on the whole-system backup stops every app for about eight minutes while the page promises „csak néhány másodpercre".** MEASURED 2026-09-14 (BIGNIGHT, VM 333, 12 apps): the button's call quiesced all 12 stacks at 19:03:23Z (first stopped 19:03:27Z); the local vzdump ran 19:03:49 → 19:09:59Z; the controller then kept the apps stopped for the second (PBS) tier and restarted them at 19:10:09Z after it failed, the last started 19:11:12Z (`phase4/guest-backup-quiesce-log.txt`) — **≈ 7 m 45 s** with every app answering 404. The page under the button: „Pillanatkép-mód: az alkalmazások csak néhány másodpercre állnak le." A household pressing it at dinner loses every app for the length of the dump, and longer on a bigger box. **Fix shape:** state the real expected downtime (it scales with data), or quiesce per tier and not across a second tier's attempt; do not start a tier whose storage is absent (see R-517). **NARROWED 2026-09-15 (controller v0.243.0 + agent v0.131.0):** a tier whose storage the agent reports absent is skipped before anything stops (`backup_tier_skipped`, once per absence; unknown never skipped), and the button copy now says „általában néhány perc, nagyobb adatnál több". Unit-proven with red-proofs. **Still open:** quiesce per tier, so a slow second tier does not keep every app down. **— NIGHT 2026-09-23 (controller v0.267.0):** the copy half is DONE: the page and the confirm now state the measured stop (≈ 8 minutes on a 12-app box), both languages, red-proofed (`audits/night-2026-09-23/A5-*`). The brief's „csak néhány másodpercre" had already gone in v0.243.0. **Still open:** quiesce per tier, so a slow second tier does not keep every app down. | **READY — P2, narrowed to per-tier quiesce; owner: CC (controller). 2026-10-05: the copy now states today's measurement too (demo-hp, 9 apps, local tier only: 5 min 47 s) — controller v0.296.0, `audits/hub-safety-2026-10-05/partE/`.** **2026-10-05 (burn-down night): a one-page design proposal (no code) is in `audits/night-burndown-2026-10-05/design-R-518.md`** — for the operator. | — | — | CC |
+| **R-638** | Backup & restore | P2 | **[P2-MEDIUM] The product's database loader cannot replay a copy over a NEWER schema: on PostgreSQL it FAILS, on MariaDB it leaves the newer version's tables behind.** MEASURED 2026-09-23 on 9202. `ImportDump` (`appbackup/dbdump.go:719`, `psql -v ON_ERROR_STOP=1 --single-transaction`) replays a `pg_dump --clean --if-exists` file over the live database. After docmost 0.95.0 → 0.96.0 migrated, the replay of the pre-update copy was refused in 0.40 s, rc 3: *cannot drop constraint workspaces_pkey on table public.workspaces because other objects depend on it / DETAIL: constraint oauth_clients_workspace_id_fkey …* — the new version created six tables whose foreign keys point at old ones, and `--clean` only drops what the dump knows. Database unchanged (the transaction rolled back). On MariaDB (`mariadb-dump`, `FOREIGN_KEY_CHECKS=0`) the same replay after romm 5.0.0 → 5.3.0 returned rc 0 in 1.25 s and left **12 base tables** of the new version behind; RomM 5.0.0 happened to ignore them. **What worked:** `DROP SCHEMA public CASCADE; CREATE SCHEMA public;` + the dump in ONE transaction — rc 0 in 1.38 s, every table, index and extension back. **Why this is a row of its own and not only part of R-637:** the SAME loader backs shipped paths — `rollbackSafetyDump` (off-site restore's undo) and the dump replay of the restores — so **any restore of a copy taken BEFORE an update that migrated, replayed over the migrated database, may fail the same way. NOT MEASURED:** whether the unit restore the hold sentence names does this (it also carries the data VOLUME tar, which may make the replay moot). That is the measurement owed, on 9202, before anyone relies on it. Evidence: `audits/update-rulings-2026-09-23/README.md` Part 1, `docmost-45`, `romm-44`. **-- NARROWED 2026-09-23:** the undo no longer touches this loader — it copies folders (decision 19, controller v0.263.0). **What stays open is the part about SHIPPED paths:** `rollbackSafetyDump` and the restores' dump replay still replay over whatever schema is live, and whether the unit restore the hold sentence names works after a real schema migration is STILL UNMEASURED. | **OPEN — P2, narrowed to the restore paths; owner: CC; measure the named restore after a real schema migration first** **2026-10-05 (burn-down night): a one-page design proposal (no code) is in `audits/night-burndown-2026-10-05/design-R-638.md`** — for the operator. | — | — | CC |
 | **R-822** | Backup & restore | P2 | **An add-only key does not make retention safe: an attacker who can only ADD snapshots can make the honest pruner erase every real one.** MEASURED 2026-10-03 (lab, restic 0.14.0 from the controller image, rclone `--append-only`): 13 empty snapshots dated in the future with the same host and tag, added through the add-only key (all allowed), make the box's exact policy `forget --group-by host,tags --keep-daily 7 --keep-weekly 4 --keep-monthly 6` keep only the fakes and select **all 3 real snapshots** for removal (`--dry-run`). **Whoever prunes an append-only repo — the box in a window, or a Felhom-side worker — inherits this.** Not a defect today (today the box can simply delete, R-95); a PRECONDITION on the R-95 build, like R-430 was. `audits/offsite-append-only-2026-10-03/lab/C3-retention-poisoning.txt` | **NARROWED 2026-10-03 — the guard ships in controller v0.289.0 (future-dated / newer-than-hub / recent-removal refusals, oldest-first cap, the lab's 13-fake shape refused in a test). RESIDUAL, not closable by a guard: an add-only attacker can plant PAST-dated snapshots interleaved with real ones and so steer weekly/monthly keeps; bounded per window by `MaxRemove` and the hub's count check, not prevented.** | — | Before any `forget`: refuse when a snapshot is dated in the future or newer than the newest the hub has seen reported; dry-run first and abort above the count the policy can remove in a week; hub compares the count before/after (DESIGN.md §3) | CC |
 | **R-49** | Backup & restore | P3 | **[P2] The offsite capture set is ~90% cache and duplication — 1.1 GB of a 1.2 GB immich "photo backup".** Measured 2026-07-19: `immich_ml_cache.tar` **823 660 032 B (~60%)** — re-downloadable ML model weights; `immich_postgres_data.tar` **308 251 136 B (~23%)** — a raw tar of the postgres data dir that DUPLICATES the logical `.sql` dump captured beside it; `upload/backups/` **18 MB** — immich's own nightly dump, a backup inside the backup, growing daily; plus the stranded pre-v3 `dccc13fe…` tree (~36 MB) no DB has ever referenced. Actual irreplaceable content: **72 MB of originals**. **MIGRATED FROM `ROADMAP.md` 2026-08-22 (R-369) — originally filed 2026-07-19, size S–M, roadmap state `idea`.** Moved verbatim; nothing added or reinterpreted. The roadmap keeps its copy as history, marked moved. | **OPEN — migrated from ROADMAP 2026-08-22, rank unchanged** **Re-ranked 2026-10-03: P2→P3: wasted space and transfer, no data risk; needs a capture-set ruling, not a sale blocker.** | — | **Evidence: `audits/DIAG-immich-restore-round2-2026-07-19.md` §4 (full byte breakdown).** This is the customer's offsite quota and transfer cost, and it lands on the Hetzner sub-account they are billed for. **Recorded, deliberately not changed** — a capture-set exclusion is a data-loss-shaped decision and gets its own ruling, not a drive-by edit. Candidates in priority order: (a) `immich_ml_cache` — pure cache, strongest case; (b) the `postgres_data` volume tar where a logical dump of the same DB is already captured (the dump is what the restore path actually replays); (c) `upload/backups/`. Likely generalises past immich into a template-classification rule about cache volumes and self-backup directories, so it should be specified against the catalog, not one app | CC |
 | **R-127** | Backup & restore | P3 | **The catalog's `data_key: true` flag is UNRELIABLE — at least four data-encrypting keys the catalog itself labels as encryption keys are unflagged; and the O4 restore path can regenerate a DB password that then does not match the restored data directory** | **READY (S/M)** | — | **Found by D5's Part 0, and it is why D5's boundary is `type: secret` rather than `data_key`.** Two separable legs. **(a) The misclassification.** Only 5 fields across 4 apps set `data_key: true` (`adventurelog/SECRET_KEY`, `homebox/HBOX_AUTH_API_KEY_PEPPER`, `papra/AUTH_SECRET`, `sparkyfitness/{API_ENCRYPTION_KEY,BETTER_AUTH_SECRET}`), yet `n8n/N8N_ENCRYPTION_KEY` („Titkosítási kulcs"), `wanderer/POCKETBASE_ENCRYPTION_KEY` („Adatbázis titkosítási kulcs"), `calcom/CALENDSO_ENCRYPTION_KEY` and `bookstack/APP_KEY` are unflagged — the catalog's own Hungarian labels contradict the flag. **D5 makes this non-urgent but not harmless:** everything `type: secret` now travels, so the keys DO reach the drive; what stays wrong is the **fail-closed gate**, which only refuses for `data_key` names — so if one of these is missing from both sources the restore proceeds onto data it cannot decrypt instead of refusing. Fix = flag them (`app-catalog-felhom.eu`, a catalog-only change) + a gate/test that the flag set and the label set agree. **(b) The regenerated-DB-password trap.** `internal/backup/restore_unit.go` O4 generates a replacement for any missing non-data-key secret. Proven on `postgres:16-alpine`: with PGDATA restored from the volume tar, `POSTGRES_PASSWORD` is ignored (initdb skipped), so the app fails over the compose network while the dump replay still succeeds through the container's local **trust** socket — success reported, data unreachable. v0.188.0 corrected the WARN's false claim that *"stored data is unaffected"* and scoped it, but did **not** add a guard: D5 shrinks this to the rare case (the secret was empty at capture AND absent from the guest). Real fix = either treat a DB password as fail-closed like a data key, or `ALTER USER` to the regenerated value after the volume restore. 18 DB/root-password fields are in scope; MariaDB fails loudly instead (Access denied), which is the safer half | CC |
@@ -274,7 +274,7 @@ stopping line that lies.
 | ID | Category | Sev | What | State | Blocked on | Next action | Owner |
 |---|---|---|---|---|---|---|---|
 | **R-243** | Monitoring & notifications | P2 | **A box in the R-241 state silently stops backing up off-site, and NO ALARM OF ANY KIND FIRES.** Found by the R-241 spike (2026-08-07) as a by-product; **not part of the walk's finding and not previously filed.** The R-241 state is self-locking in a second, worse way than the recovery-journey dead end: `escrow_state` is stuck `pending` forever (the auto-confirm flips only on a hash match, and the hash cannot match a key the box minted itself), and `runOffboxBackup` returns at the escrow gate (`offbox.go:743`) before touching anything. **So off-site backups never run again — and the hub never notices.** All three signals that could catch it are excluded, each for its own individually-correct reason, verified in the hub this session: `offsite_stale` — `isStale` (`monitor/offsite.go:135`) returns false unless `EscrowState == "escrowed"`, and its own comment reads *"Pending/disabled = normal onboarding, never stale"*, so the box is classified as **still being set up, forever**; `offsite_delivery_stuck` — `monitor/offsite_delivery.go:91` skips the `applied` shape, and delivery genuinely IS applied (the credential was consumed and the target is in every report); `backup_failed` — never fires, because nothing fails: the run returns `nil` before it starts. **Three correct exclusions leaving one state unobserved.** This is the same class as the workspace `CLAUDE.md` "presence is not success" rule, one level up: **the absence of a failure is being read as the presence of a working tier.** **Partly subsumed by R-241's fix** — a box that recovers leaves this state — but **not for a box that does not**, and the alarm gap is what makes "does not" survivable indefinitely. **Not fixed; no code written.** **⚠ UPDATED 2026-08-07 (v0.206.0) — the STATE this row describes can no longer be entered, but the ALARM GAP is untouched and the row stays open.** R-241's mint guard means a box no longer mints a key over a sealed package, so it no longer arrives in the "escrow stuck pending against a self-minted key" state by itself. **What replaces it is a state that is VISIBLE rather than silent:** the box declares `offsite.state=awaiting_recovery_key` and the customer is offered the recovery screen. **But the hub still raises nothing for it**, and for the same three reasons: `isStale` needs `escrowed`, the delivery checker skips the `applied` shape, and `backup_failed` needs a run that never happens. **So a box whose customer never acts still stops backing up off-site with no operator signal** — the difference is that the customer can now see it and act, where before nobody could. **The remaining work is an operator-side signal for a box held in `awaiting_recovery_key` past some age**, and it is deliberately not bundled into R-241's fix.  **⚠ MEASURED ON A REBUILD, 2026-08-07 (fifth walk) — the gap is real for the state this row describes, and NOT for the state a rebuild produces.** 88 seconds after the walk5 guest was destroyed and rebuilt, the hub emitted `offsite_delivery_stuck` (**warning**) and wrote an **operator-channel** `notification_log` row recording `offsite_credential_restaged` / status **REFUSED** with an accurate reason — *"the credential was applied and worked; the target was lost afterwards … a guest rebuild does, R-193"*. So on the **regressed-apply** shape the operator IS told, promptly and correctly, and this row's *"skips the applied shape"* does not apply. The gap stands for a box that reaches the held state **without** a prior working tier in its report history. **Recorded so the row is not read wider than it measures.** | **READY** — owner Viktor | — | — | operator |
-| **R-528** | Monitoring & notifications | P2 | **[P2-MEDIUM] Docker does not report an OOM kill inside a Felhom LXC guest: `OOMKilled` stays false and no `oom` event fires, so the v0.243.0 OOM line is not proven live.** MEASURED 2026-09-15 on scratch 9202 (Docker 29.8.0): Paperless capped at 128M restarted 11 times with `OOMKilled=false` and zero `docker events --filter event=oom`; a memory hog inside the running container was killed (rc 137) with the same silence (`E2-oom-signal-measure-9202.txt`). BIGNIGHT VM 333 did read `oomkilled=true`, so the shape differs by case. **Fix shape:** the agent reads the guest container cgroups' `memory.events oom_kill` counters (host-side, reliable), or the controller alarms on a restart-count trend **RE-MEASURED 2026-09-16 on the DRILL box (fresh install, nested VM 334, Docker in an LXC guest, controller 0.243.0), so the finding is not a property of one machine:** the Paperless webserver was capped at 128 M with `docker update --memory`; it restarted 9-10 times, and all three signals stayed silent - `OOMKilled=false` on every inspect, `docker events --filter event=oom` EMPTY for the whole window, the container's cgroup not visible from inside the guest, and `dmesg` unreadable there. Identical to scratch 9202. So the v0.243.0 OOM line cannot fire on ANY Felhom box as shipped, on either host. Evidence: `audits/evidence-drill-0243-2026-09-16/phase2-m1-oom.txt`. | **READY — rank P2-MEDIUM; owner: CC** **2026-09-17 (chaos night): an OOM WAS detected on a fresh box, and named precisely.** On `tester-1-022354` (controller 0.245.0, guest 9201, 6 GB RAM) immich’s Postgres was killed by the memory limit during its reverse-geocoding import, and the controller pushed `app_oom` (warning, operator-only): „Alkalmazás memóriája elfogyott: immich (immich-postgres) — egy folyamatát a memóriakorlát leállította” — naming the app AND the exact container. The visible consequence was `write CONNECTION_CLOSED immich-postgres:5432` and twelve restarts of immich-server. So on THIS box the OOM scan works and was the fastest route to the diagnosis; recorded here rather than filed as a new row. Evidence: `audits/evidence-chaos-night-2026-09-17/round-2.txt`. | — | — | CC |
+| **R-528** | Monitoring & notifications | P2 | **[P2-MEDIUM] Docker does not report an OOM kill inside a Felhom LXC guest: `OOMKilled` stays false and no `oom` event fires, so the v0.243.0 OOM line is not proven live.** MEASURED 2026-09-15 on scratch 9202 (Docker 29.8.0): Paperless capped at 128M restarted 11 times with `OOMKilled=false` and zero `docker events --filter event=oom`; a memory hog inside the running container was killed (rc 137) with the same silence (`E2-oom-signal-measure-9202.txt`). BIGNIGHT VM 333 did read `oomkilled=true`, so the shape differs by case. **Fix shape:** the agent reads the guest container cgroups' `memory.events oom_kill` counters (host-side, reliable), or the controller alarms on a restart-count trend **RE-MEASURED 2026-09-16 on the DRILL box (fresh install, nested VM 334, Docker in an LXC guest, controller 0.243.0), so the finding is not a property of one machine:** the Paperless webserver was capped at 128 M with `docker update --memory`; it restarted 9-10 times, and all three signals stayed silent - `OOMKilled=false` on every inspect, `docker events --filter event=oom` EMPTY for the whole window, the container's cgroup not visible from inside the guest, and `dmesg` unreadable there. Identical to scratch 9202. So the v0.243.0 OOM line cannot fire on ANY Felhom box as shipped, on either host. Evidence: `audits/evidence-drill-0243-2026-09-16/phase2-m1-oom.txt`. | **READY — rank P2-MEDIUM; owner: CC** **2026-09-17 (chaos night): an OOM WAS detected on a fresh box, and named precisely.** On `tester-1-022354` (controller 0.245.0, guest 9201, 6 GB RAM) immich’s Postgres was killed by the memory limit during its reverse-geocoding import, and the controller pushed `app_oom` (warning, operator-only): „Alkalmazás memóriája elfogyott: immich (immich-postgres) — egy folyamatát a memóriakorlát leállította” — naming the app AND the exact container. The visible consequence was `write CONNECTION_CLOSED immich-postgres:5432` and twelve restarts of immich-server. So on THIS box the OOM scan works and was the fastest route to the diagnosis; recorded here rather than filed as a new row. Evidence: `audits/evidence-chaos-night-2026-09-17/round-2.txt`. **2026-10-05 (burn-down night): a one-page design proposal (no code) is in `audits/night-burndown-2026-10-05/design-R-528.md`** — for the operator. | — | — | CC |
 | **R-79** | Monitoring & notifications | P3 | **`report.Issues` / `report.Warnings` are English on customer-facing surfaces** **MIGRATED FROM `ROADMAP.md` 2026-08-22 (R-369) — originally filed 2026-07-26, size M, roadmap state `idea`.** Moved verbatim; nothing added or reinterpreted. The roadmap keeps its copy as history, marked moved. | **OPEN — migrated from ROADMAP 2026-08-22, rank unchanged** **2026-10-05 (burn-down night): NEEDS A DESIGN** — the issues and warnings travel to the hub as sentences; changing them is the two-repo spike the row itself names. | — | **Whole-surface, not a one-off** (DIAG §6): every producer is English — `"SSD/HDD disk usage critical"`, `"Docker: %v"`, `"Protected container not running: %s"`, and all six `Warnings` strings. They render on the customer's Hungarian dashboard, and the `health_critical` path has reached the **customer** email channel three times historically. Deliberately NOT bundled into R-77: a copy sweep across every producer would have buried two safety fixes in string churn, and the seam is not obvious — translate at the producer, or at the render/notification boundary where operator-English and customer-Hungarian already diverge? Pick the seam in a spike; the strings are mechanical after. | CC |
 | **R-211** | Monitoring & notifications | P3 | **Prometheus has no config-reloader — a rules change reaches the pod and is never read** | **READY (S) — NEW 2026-08-05** | — | Found while verifying R-205 rather than by looking for it. The `mon-system/prometheus` Deployment runs **one** container (`prom/prometheus:v3.12.0`) with **no `configmap-reload`/`prometheus-config-reloader` sidecar**. After the ArgoCD sync the updated `node-housekeeping-alerts.yml` was present **inside the pod** (`grep -c "and on(instance)"` → 3 on the mounted symlink) while the Prometheus **rules API still served the old expression** — for **4+ minutes**, with no error anywhere. It only took effect after an explicit `POST /-/reload`. **The consequence is general, not specific to R-205: every rule edit in this repo since the stack was built has silently not applied until something happened to restart the pod** — so "committed and synced" has never meant "in force", and ArgoCD reporting `Synced/Healthy` is true and beside the point. `--web.enable-lifecycle` IS already set, so the fix is small: add a reloader sidecar watching the ConfigMap, or a `checksum/config` pod annotation so a rules change rolls the pod. **Same class as the four *built-but-never-wired* seams** — the control exists, nothing walks it | CC |
 | **R-271** | Monitoring & notifications | P3 | **The `agent_channel_unauthorized` alarm can never be closed, because its own prescribed remedy is what silences the recovery.** `channelhealth.Checker.Check`'s UP branch notifies only when `prev != "" && prev != "up"`; a controller restart resets `state` to `""`, so an unseeded→up transition is silent by construction. The alert text says *"token stale/rotated (**re-bootstrap**)"* — i.e. restart the controller — so **following the instruction guarantees no recovery event.** Observed live 2026-08-09: two `agent_channel_unauthorized` errors on the hub (one `sent`, one `suppressed` by the 1 h operator cooldown) and **nothing afterwards**, though the channel came up 3 minutes later and stayed up. The down side is deliberately asymmetric (F2: a born-down channel alerts on cycle 1); the up side never got the matching treatment. Customer dashboard is fine — `SetDashboard` reflects current state every cycle. It is the OPERATOR's trail that ends on "down" | **READY (S) — NEW 2026-08-09** **2026-10-05 (burn-down night): FIXED on controller `main`** (`f885100` — a down alert leaves a marker, so the first good probe after a restart reports the recovery; test + red-proof). Ships with the next controller release; close after delivery. | — | Notify on unseeded→up when the previous *persisted* state was down, or seed from the hub's last event | CC |