felhom-agent/CHANGELOG.md

v0.104.0-dev — R-85 Phase 2: tier rotation, persisted state, one heavy op at a time (2026-07-26)

The scheduler could only ever see cfg.Backup.BackupTarget(), so the offsite tier's archives were never candidates. That is why demo-hp's DR tier reported applied with zero snapshots for five days and nobody noticed.

Selection — oldest-first (operator ruling 2026-07-26, Option 1)

The tier whose last successful restore-test is oldest goes first; never-proven sorts first of all, which is exactly where the offsite tier starts. Self-balancing, no new config knob, and each tier is covered every ~2 cadences — comfortably inside the 2-week offsite retention, so a tier is never proven against an archive that is about to be pruned. Ties break on target id, because two tiers proven in the same second would otherwise rotate by Go's randomised map order: untestable, and occasionally starving.

Rotation credit is given only on success. A tier that fails every time must keep sorting first — otherwise a permanently broken tier would look freshly proven and quietly stop being retried.

Added

• backup.RestoreTestState — last successful restore-test per tier, persisted (atomic tmp+rename). This one genuinely needs persistence, unlike R-84, and the difference is worth stating because they look alike: R-84 had a GROUND TRUTH to consult (the archive is still on the storage), so it never persisted anything. A restore-test destroys its scratch as its final act and leaves no artifact — "did we prove this tier restores?" exists only as remembered state. A corrupt or missing file degrades to "nothing proven", which is the correct starting point.
• backup.InFlight — the host-wide one-heavy-operation gate, shared by the restore-test scheduler and the local-API backup path. Not a lock concern (the scratch VMID never touches the live guest's vzdump lock) but a LINK concern: an offsite restore PULLS multi-GB over the same tunnel an offsite backup PUSHES one. At the ~33 MB/min measured upstream, running both drives each toward its timeout — which is how a healthy tier ends up recorded as failed. A caller that cannot acquire defers; it never cancels what is already running.
• BackupRunner.PickRestoreCandidateOn — newest archive on a NAMED tier. "" + nil error when that tier holds none: a tier with nothing to restore is not an error, or every fresh box would look broken for its first week.

Changed

• A tier with no archive is skipped and the next tier tried, not left to burn the cadence. It cannot starve either — an empty tier is still the least recently proven, so it still sorts first the moment it has an archive.
• POST /backup now also joins the gate: a 409 naming the holder when a restore-test is running.

Tests

+12. Red-proofs observed:

• A — the single-target picker yields both tiers must be exercised across 4 cadences; got [local:… local:… local:… local:…].
• E — losing the state file yields after a restart the OTHER tier must be next; got … twice (rotation state was lost).
• F — removing the gate yields the restore-test must DEFER while a backup holds the gate; concurrent operations = 2. The count is the assertion — "both completed" would pass against a fully concurrent implementation.

Full suite green (29 packages, rc=0, vet unpiped).

v0.104.0-dev — R-85 Phase 1: the restore-test spec is built PER RUN (2026-07-26)

Prerequisite for scheduling the offsite tier at all. Shipped on its own because it is independently correct and independently testable.

SchedulerOptions.Spec was a value, produced by an immediately-invoked function at daemon start (main.go). So storageTier() and restoreTaskTimeout() were evaluated once and their result reused for every run for the lifetime of the process. Two consequences:

• Nothing tier-varying was expressible. The offsite tier could never be scheduled, because the spec's tier was fixed to whatever the configured target was at boot.
• A latent staleness bug in its own right: a storage-type or config change did not take effect until the daemon restarted.

Changed

• backup.SpecBuilder — func(ctx, archive) reconcile.RestoreTestSpec, called once per run. The archive is passed in because the tier MUST come from it (restoreTierForArchive, the v0.100.0 rule). Deriving it from the configured target is what classified a PBS archive as local and killed a 14.46 GB WAN restore at the 10-minute local bound.
• A nil spec builder SKIPS loudly instead of panicking. Run already refused to start without one, but tick is reachable directly; a wiring bug must cost a restore-test, never the daemon goroutine.

Tests

+3. Red-proof observed: restoring the frozen value fails with the spec builder must run ONCE PER RUN, got 0 call(s) across 3 ticks. Full suite green (29 packages, rc=0, vet unpiped).

v0.103.0 — R-84: an agent restart no longer triggers a redundant backup (2026-07-26)

Observed live, not theorised. Three redundant local backups ran on demo-felhom in a single afternoon of deploys (2026-07-26). The backup Store is in-memory — its own doc comment says "lost on restart; the cadence re-populates" — so after every restart /backup/due answered "no successful backup recorded yet" and the controller dutifully took another one.

On the local tier that is wasted minutes. On the OFFSITE tier it is a wasted multi-hour WAN upload after every agent deploy — and agent deploys are routine. That is what moved R-84 from a tidy-up to something close to a prerequisite for running the offsite tier at all.

Changed

• BackupRunner.NewestArchiveTime — when a backup last LANDED on this tier's storage, read from the storage.
• localapi.BackupArchiveLister (optional extension to BackupService) — the due-check consults it and takes whichever is newer, the in-memory record or the storage.

Why ask the storage instead of persisting the store

• It is ground truth, not remembered state. A pruned or deleted archive correctly stops counting; a persisted record would keep claiming a backup that no longer exists.
• No new on-disk state, no migration, and it is the same source latestArchive already trusts to build the post-backup record.
• It answers only "when did a backup last land", which is exactly what the due-check needs. The richer fields (size, duration, uncovered volumes, error) stay with the real in-memory records — a synthesized record would put invented numbers into the host-report, and the hub already covers history via its own retained-report window (R-81).

Fail-safe directions

• Storage read error → fall back to the in-memory record. An unreadable storage must never make a tier look freshly backed up, and must not suppress a backup either.
• Storage genuinely empty → due. The fix must not invent a backup.
• Archive present but old → still due. This is not a blanket suppressor.
• Service without the optional lister → pre-R-84 behaviour, unchanged.

Tests

+6, full suite green (29 packages). Red-proof observed: removing the fold-in reproduces Due:true Reason:no successful backup recorded yet against a storage holding a 2 h-old backup.

v0.102.0 — R-82 Slice D: an unprovisioned tier DEFERS instead of failing (2026-07-26)

Prerequisite for putting the offsite tier into the installer defaults (host-install 1.20.0).

A fresh box now carries the offsite tier in its config, but felhom-pbs does not exist until the hub provisions the DR tier (felhom-pbs-apply). Without this change the tier would report due in that window, so the controller would quiesce the apps and fire a vzdump at a storage that is not there — every cadence, until provisioning happens.

Changed

• GET /backup/due?target=… DEFERS when the target storage is absent (Server.targetStoragePresent): due:false, reason "target storage not present yet — tier deferred until it is provisioned". The tier stays silent until it is real and goes live with no restart the moment the storage appears.

Fail-safe, and it is the point: a storage-view ERROR returns present and the tier stays due. "I could not check" must never be read as "not there" — reading it that way would silently suppress backups, which is the absence-is-not-failure rule this project has now relearned three times (R-80, R-81, and the R-82 wait-timeout). Pinned by TestBackupDue_StorageViewError_DoesNotSuppress.

Tests

TestBackupDue_TargetStorageMissing_Defers (deferral + a reason that says WHY, so it is distinguishable from a healthy tier) and the fail-safe above. Full suite green.

v0.101.0 — R-82: a leaked restore-test scratch can no longer auto-start (2026-07-26)

Correction first, because it matters more than the fix. I reported earlier in this arc that the restore-test would boot a scratch guest carrying the live guest's MAC, static island IP and hostname, and so would break the controller→agent link. That was WRONG. RunRestoreTest step 2 link-downs every interface (withLinkDown, unit-tested) BEFORE the guest is ever started, so on the normal path there is no L2/IP conflict. The design already handled it.

What is real is narrower. A restore that fails before step 2 — exactly what the v0.100.0 wait bug caused — leaves a scratch guest holding the SOURCE guest's config verbatim, including onboot: 1. If teardown then also fails (it did: 403 … missing privilege VM.Allocate, because PVE associates the pool only at restore COMPLETION), the leaked guest survives and a host reboot would start it alongside the original, NICs up, same MAC, same 169.254.253.2/30.

So the hazard needed three things to line up, and it did, once, on demo-felhom.

Changed

• proxmox.RestoreLXCOptions.ConfigOverrides — arbitrary guest-config params applied AT RESTORE TIME, for settings that must hold from the instant the guest exists.
• The restore-test passes onboot=0. At restore time, not after: "after" is precisely the path that leaks. A leaked scratch is now inert across a host reboot even with its NICs still up.

NOT changed

• The link-down step. It was already correct and is the primary defence; this is depth behind it.
• The agent's Proxmox privileges. It still cannot tear down a scratch until the restore completes. Widening VM.Allocate to /vms would remove the accidental guard that stopped a destructive mid-restore teardown — the wrong trade. With the v0.100.0 timeout fix the teardown no longer fires mid-restore.

Operational

restore_test_cadence_seconds was set to -1 on demo-felhom as a stopgap under the mistaken reading above. Re-enabled — the scheduled restore-test is safe and always was.

Tests

TestRestoreTest_RestoreSetsOnbootZero; red-proof observed (removing the override yields got "" (map[string]string(nil))). Full suite green (29 packages).

v0.100.0 — R-82: the restore tier comes from the ARCHIVE, not the configured target (2026-07-26)

Found by the first real PBS restore round-trip (2026-07-26), not by review. Restoring felhom-pbs:backup/ct/9201/2026-07-26T12:21:48Z on a box whose primary target is "local" failed after exactly 600.76 s — the 10-minute local wait — against a 14.46 GB WAN restore that needed roughly two hours.

--selftest=restore-test derived its tier with storageTier(ctx, px, cfg.Backup.BackupTarget()) — the configured default target — and then restoreTaskTimeout correctly returned the local (10 m) bound for it. The recorded result even said "source_tier": "local" for a PBS archive.

The tier-aware machinery was already right; it was fed the wrong input. RestoreTaskTimeout, the generous RestoreTestPBSRestoreTimeout (120 m), and the pool-association handling all existed and all worked. What broke is an assumption that stopped being true the moment a second tier existed: "the configured target" is no longer a proxy for "the tier this archive belongs to".

RestoreTestSpec.RestoreTaskTimeout's own doc comment predicts the consequence exactly:

"…else the wait expires mid-restore, teardown fires against a still-restoring (not-yet-pool-associated) guest, and the scratch leaks."

Which is what happened: the teardown fired at a live restore and was refused — HTTP 403 … missing privilege VM.Allocate — because PVE associates the pool only when the restore COMPLETES, and the agent's VM.Allocate is granted on /pool/felhom, not on /vms. The 403 was load-bearing luck: it is the only reason a destructive teardown did not run against a half-restored guest. The restore itself carried on to completion, unharmed.

Changed

• restoreTierForArchive(ctx, px, archive, fallbackTarget) — derives the tier from the ARCHIVE'S OWN storage (archiveStorageID parses the volid prefix), falling back to the configured target only when the volid carries no prefix. Wired into the --selftest=restore-test path.

NOT changed (recorded, not fixed here)

• The daemon's scheduled restore-test still only covers the PRIMARY tier. Its Pick uses a runner built on BackupTarget(), so it never selects a PBS archive, and its Spec is built once at construction rather than per tick. That is self-consistent today (tier matches archive) but it means the offsite tier is never automatically restore-tested — a real R-82 gap, and arguably the more important half of "is the DR tier real?". Needs a per-tick spec; own task.
• The agent cannot tear down a scratch guest until its restore completes (no VM.Allocate on /vms; the pool association lands only at completion). With the correct timeout the teardown no longer fires mid-restore, so this is latent again — but it is not fixed, and widening the token's privileges is deliberately NOT the answer.

Tests

TestArchiveStorageID pins the volid parsing incl. the i>0 guard (a leading colon is not a storage id). Full suite green (29 packages).

v0.99.0 — R-82: operator rulings — 2-week offsite retention + one backup at a time (2026-07-26)

Implements two operator rulings of 2026-07-26. Both are behaviour changes on the multi-tier path only; a single-tier config is untouched.

Ruling 1 — keep two weeks of weekly offsite backups

localPruneSpec refused to prune ANY PBS target. That blanket refusal is now scoped: an ADDITIONAL tier with an explicitly configured keep_last may prune its PBS target (NewBackupRunnerFull(..., allowPBSPrune)).

The refusal still applies in full to the PRIMARY tier, and that is not caution for its own sake: BackupTarget() defaults to "felhom-pbs" and KeepLast() defaults to 3, so a box with neither key set would silently prune its offsite DR down to 3 restore points. An additional tier cannot have that accident — its keep_last defaults to 0 (never prune), so any value there is a deliberate act.

Ruling 3 — let the first backup run as long as it needs; nothing else starts until it is done

• Wait bound for an additional tier raised 6h → 12h. Measured on demo-felhom: ~33 MB/min over the wg link, so a first FULL ~10 GB snapshot projects to ~5h. 12h gives real margin on a slower link while staying BOUNDED — a genuinely hung task must still surface eventually.
• ONE BACKUP AT A TIME PER GUEST, ACROSS ALL TIERS. POST /backup now refuses with 409 when a DIFFERENT tier has a backup in flight, naming the busy tier and job. vzdump holds a guest lock, so a concurrent second backup could not succeed anyway — but without this guard it would be ATTEMPTED, fail on the lock, and record a spurious failure that leaves the tier permanently due.
  • SAME tier in flight → still returns THAT job (202, idempotent) — unchanged.
  • DIFFERENT tier in flight → 409 with no data object, so nothing is parseable as the caller's own job. Handing back a foreign job id is precisely how a caller comes to believe its backup ran.
  • snapshotted now counts as in flight, not just running. After the storage snapshot the vzdump is still uploading and still holds the lock; the pre-R-82 check looked at running only, leaving a window where a second POST started a real second vzdump. Latent bug, closed here.

Tests

Full suite green (29 packages). TestBackupPost_SecondTierRefusedWhileAnotherInFlight, …_SecondTierAllowedAfterFirstFinishes, …_SnapshottedCountsAsInFlight, and the per-tier wait-bound test updated to 12h. Red-proof for the wait bound observed and restored.

v0.98.0 — R-82 Slice A fix: per-tier vzdump wait bound (the 30-minute false failure) (2026-07-26)

Found by live validation on demo-felhom, not by review. The first real PBS-targeted backup ran past the runner's hard-coded 30-minute WaitTask bound. The agent stopped waiting, recorded success:false — while the vzdump kept running (still running 72 minutes later, 2.4 GB uploaded). That is not "the backup didn't happen"; it is worse:

• the tier stays permanently due (a failed backup never satisfies a cadence),
• the next attempt collides with the guest lock the live vzdump still holds,
• the hub sees a DR tier that never succeeds — R-82's "applied and empty" fault, re-created by a timeout,
• the recorded Backup says success:false, size_bytes:0 for a backup that may yet complete.

30 minutes is right for a LOCAL vzdump (minutes) and simply wrong for an offsite upload. Measured on demo-felhom: ~33 MB/min over the wg link to Hetzner ⇒ a first FULL ~10 GB snapshot projects to ≈5 h.

Changed

• BackupTargetConfig.WaitTimeoutSeconds — per-tier vzdump wait bound. Defaults: primary 30 m (UNCHANGED), additional tier 6 h. The asymmetry is the point: the primary is the local tier where a 30-minute hang IS a genuine fault worth surfacing; an additional tier is by construction the offsite one, where the binding constraint is uplink speed, not health. 6 h is sized from the measurement above, not guessed.
• backup.NewBackupRunnerWithWait — the runner's wait bound is per-instance (i.e. per tier). NewBackupRunner keeps its signature and delegates with 0 ⇒ 30 m, so every other caller (restore-test, selftest) is untouched.
• localapi.BackupTier.WaitTimeout — the fire-and-forget backup context is now sized from the tier instead of a fixed 2 h. Both bounds had to move: a 6 h runner bound under a 2 h outer context would have reproduced the same false failure four hours later.

Same reasoning, and the same direction, as restore_test_pbs_restore_timeout_seconds on the restore side: when in doubt wait LONGER. A slow backup is a slow backup; a false timeout is a corrupt status plus lock contention.

Tests

TestBackupTiers_WaitTimeoutIsPerTier pins the asymmetric defaults, the override, and that the two tiers do NOT share one bound. Red-proof observed: setting the extra tier's default back to 30 m fails with an offsite tier must default to a GENEROUS wait — a false timeout is worse than a slow pass; got 30m0s. Restored; full suite green.

v0.97.0 — R-82 Slice A: per-target backup tiers (local daily + PBS weekly) (2026-07-26)

Additive; MinAgent floor rises for the multi-tier contract (a controller that wants per-tier backups needs this agent — but see the compatibility rule: an OLD controller is unaffected).

Slice A of R-82. BackupTarget() returned ONE string and BackupCadence() ONE 24h window, so "local daily and PBS weekly" was not expressible at all — which is why the DR promise is currently unbacked (demo-felhom holds one PBS snapshot from 2026-07-18, demo-hp zero, ever). Phase-0 gate results: felhom.eu/documentation/audits/SPIKE-r82-phase0-2026-07-26.md.

This slice ships the mechanism only. No box's behaviour changes until a backup_targets entry is added to its config (Slice D). An untouched config resolves to exactly one tier and behaves byte-identically to v0.96.0.

The compatibility rule (load-bearing)

The agent and controller deploy independently, so the untargeted local-API contract is frozen:

• GET /backup/due with no ?target= → the PRIMARY tier, same cadence, same response bytes. BackupDueResponse.Target is omitempty and left EMPTY for untargeted requests, so an old controller cannot tell this agent from the old one. Pinned by a red-proofed test.
• Same for POST /backup and GET /backup/status.
• The primary tier's job-id format is unchanged; only additive tiers carry a target segment.

Added

• config.BackupTargetConfig + BackupConfig.ExtraTargets (backup_targets) — each tier carries its OWN cadence and its OWN retention. Those are semantically different per tier: keep-last=3 is three DAYS on a daily tier and three WEEKS on a weekly one, so sharing one knob guarantees one of them is wrong.
• BackupConfig.BackupTiers() ([]BackupTier, []string) — resolves the tier list, primary first, plus warnings the caller MUST log. A tier is rejected, not defaulted, when its cadence is missing: silently defaulting a weekly DR tier to the 24h local default would fill the 37.2 GB datastore. Empty/duplicate targets are rejected too. main.go logs every rejection at ERROR — a silently dropped backup tier is the "applied and empty" fault this task exists to fix.
• GET /backup/tiers — advertises the tiers, primary first. This is the controller's capability probe: a 404 means a pre-R-82 agent, and Slice B falls back to single-tier on it.
• localapi.BackupTier + normalizeBackupTiers — nil tiers synthesize the legacy single tier, so every existing caller and test hits the pre-R-82 path untouched. A tier with a nil runner is DROPPED rather than advertised (advertising one would be an applied-and-empty tier).

Changed

• /backup/due?target= judges that tier against ITS OWN newest successful backup (latestSuccessfulBackupForTarget). Without this filter a fresh daily local backup would satisfy the weekly PBS cadence and the DR tier would never run — today's bug, re-created in code. The store was already keyed by target, so this is a lookup change, not a data-model change.
• Backup jobs are keyed by (vmid, target), not vmid. Single-flight is now PER TIER, which is what lets the weekly night run both backups inside ONE quiesce window (Slice B). Keying by vmid alone handed the second caller the first tier's job id — caught by its own test, and it would have made the controller believe a PBS backup ran when only the local one had.
• Job ids are unique per tier by construction, not by clock luck (two tiers can start in the same nanosecond). The primary keeps the old format; additive tiers carry the target segment.
• One runner per tier (main.go). The runner holds target/mode/notes/retention as immutable construction state and localPruneSpec reads that retention — parameterising a single runner by target would risk pairing tier A's target with tier B's retention.
• An unknown ?target= is a 400, never a silent fallback to the primary. A controller asking about a tier this agent does not serve must find out, not act on another tier's freshness.

NOT changed (deliberate)

• The local tier. Same target, same 24h cadence, same keep-last=3 clamp. It is the only honest tier today and this slice does not touch it.
• PBS is still never pruned by the per-run --prune-backups flag (localPruneSpec). Per-tier retention is plumbed and a tier's keep_last defaults to 0 = never prune, but turning on automatic pruning of the DR datastore is irreversible and needs an operator ruling — R-82 Phase 0 already flagged retention as needing one. Recorded, not decided here.
• The fail-safe-toward-due rule on an unparseable timestamp. A spurious backup is cheap; a skipped one is not.

Tests

768 (was 748), +20 across internal/localapi/backup_tiers_test.go and internal/config/backup_tiers_test.go. Red-proof #1 (old controller ↔ new agent) observed: removing the untargeted compat branch makes the untargeted body carry "target":"local" and the test fails on it. Restored.

v0.96.0 — R-50 island NIC: provision attaches the guest's island net1 (2026-07-25)

Additive; MinAgent unchanged (no controller coupling — the controller dials whatever bootstrap.json says, and the pin is address-independent). Implements the provisioning half of the R-50 island control plane, spiked GO in felhom.eu/documentation/audits/SPIKE-island-bridge-2026-07-25.md. A fresh install is now born immune to F1 (AUDIT-vacation-remote-ops-2026-07-20: a LAN/DHCP move made the agent fail to bind → storage/PBS/quiesce/restore-test/DR down, silently).

• LocalAPIConfig gains island_bridge + island_guest_addr (config.go). IslandEnabled() = both set. Validate() enforces all-or-nothing + a CIDR guest addr — a half-set/malformed island fails at load (a botched install), never a silent LAN fallback that would leave an island bind with no island NIC.
• buildBringUpConfig (reconcile/bringup.go): when both island fields are set, attaches a static net1=name=eth1,bridge=<vmbr9>,ip=<169.254.253.2/30> (no hwaddr → fresh per-guest MAC) on BOTH provision and DR bring-up. Empty = pre-R-50, no net1 (byte-for-byte the old config on non-island hosts). Plumbed from cfg.LocalAPI at both RunBringUp call sites (cmd/main.go). The bootstrap endpoint already derives from listen_addr (main.go), so moving the agent bind to the island moves the guest dial for free — no template change (A0 determination).
• Design note (A0/A3): endpoint is config-derived, so no code was needed there; the guestnet healer is eth0-only (parseMode is dev-scoped) so the static island eth1 is outside its scope — a red-proof test locks that in (TestParseMode_IslandStaticNICDoesNotConfuseEth0) rather than changing the healer.
• Tests (all non-hollow, red-proofed): TestBuildBringUpConfig_IslandNIC, TestLocalAPIConfig_IslandValidation, plus the healer scoping test above.
• Coupling (deploy order): a host-install that writes the island config REQUIRES agent ≥ 0.96.0 to read island_guest_addr and attach net1 — vouch 0.96.0 before island installs go live. Migration of existing boxes is the Phase-B runbook (felhom.eu/documentation/runbooks/RUNBOOK-island-migration.md).

v0.95.0 — SMART coverage: union-path drives + LVM/dm root + device model (2026-07-25)

Additive; MinAgent unchanged; hub untouched (unknown JSON fields ignored). Implements the graded fixes from felhom.eu/documentation/audits/SPIKE-smart-coverage-2026-07-25.md, which proved both demo disks answer the allowlisted smartctl -a -j with PASSED but the agent never asked.

• Fix B — union-path SMART: registry/USB drives ride the /disks union path (driveTargets.Known), which skips Observe's enrich, so they showed "Nincs adat" despite working SMART. New storage.SmartReader (SMARTForBacking, reuses smartDeviceFor) is wired into the union path via a localapi seam — the USB drive now reports its real verdict. The watchdog Known path stays enrich-free (asserted: zero smartctl calls).
• Fix A — LVM/device-mapper resolution: smartDeviceFor gains a dm branch that resolves /dev/dm-N / /dev/mapper/X to the single backing whole disk via /sys/block/<dm>/slaves (recursive; skips rather than guesses when slaves span >1 physical disk). And the builtin local dir on the LVM root — whose backing_device is empty by design (removable-safety) — now gets a SMART-only device resolved from its containing filesystem (mount table), never touching backing_device/durable_id. The system SSD stops reading "Nincs adat".
• Device model: SmartSummary.ModelName captured from smartctl's own model_name (already parsed), so the controller card can label a disk "TOSHIBA MQ04ABF100" instead of a raw UUID.
• Fix C (-d sat) stays rejected (disproven live; absent from sudoers). No sudoers/manifest change. Consumed by controller v0.171.0. Tests: dm-resolution table (+multi-disk-skip red-proof), containing-fs resolution (+red-proof), union-path SMART (+red-proof), model capture, Known-path-never-SMARTs.

v0.94.0 — serialize per-disk SMART into the /disks payload (2026-07-24)

Additive, backward-compatible; MinAgent floor unchanged (the controller feature-detects by payload presence). No new smartctl load, no new endpoint, no sudoers change — the SMART is already computed on the request path (storage.Observe → enrich runs smartctl -a -j for dir-backed targets); this release simply copies the target's already-populated Smart into localapi.DiskInfo.

• DiskInfo gains Smart *hub.SmartSummary \json:"smart,omitempty"`. In handleDisksthe summary is copied **only whent.Smart.Health != ""`** — a zero-value summary (SMART never read: no smartctl device, USB bridge, or a failed read) stays omitted, so the controller sees absent and renders "Nincs adat" rather than a misleading UNKNOWN. The union-in drives (driveTargets.Known path, no enrichment) carry no SMART and are omitted by the same guard.
• The controller (v0.169.0) consumes this to render a "Lemezek állapota" card + a 6-hourly degradation notification. Old controllers ignore the extra field.
• Test TestDisks_SmartSerialized (payload includes SATA counters + temperature for a fixture target; absent-SMART target omits the field); red-proof: drop the copy → the serialized-Smart assertion fails.

v0.93.0 — a recovery code can no longer contain a hyphenated word (2026-07-21)

SHIPPED 2026-07-22: built + published (sha256 a68b2ff73200622e…), Day-0-manifest-vouched, deployed to both fleet boxes (felhom-pve + demo-hp), clean-restart verified. Record: felhom.eu/documentation/pilot/RUNBOOK-publish-agent-0.93-2026-07-22.md.

Generation-only change. Every recovery code already issued remains valid — R is consumed as a whole passphrase by the PBS scrypt KDF (Wrap/Unwrap) and is never re-split, so nothing about verification moves. Nothing in the KDF/consume path, the word count, or the joiner changed.

The EFF large wordlist contains exactly four entries that themselves contain the hyphen we join words with: drop-down, felt-tip, t-shirt, yo-yo. Drawing one produced a code that reads as 11 words rather than 10 — ambiguous to transcribe in exactly the situation R exists for, a customer reading a code back during a disaster. The generator now draws from the list filtered of those four (joinSafe), so a code always segments back into exactly RecoveryCodeWords.

• Entropy floor holds, with the numbers asserted in the tests: the draw space goes 7776 → 7772, so a 10-word code goes 129.248 → 129.241 bits. The cost is 0.007 bits against a 128-bit floor.
• The long-standing ~1/5 test flake was this defect, not a flaky test. TestGenerateRecoveryCode_EntropyAndFormat counted words by splitting the joined string, which conflates "how many words were drawn" with "how many segments the code has". It now counts what the generator drew, and asserts the segmentation property separately — the property joinSafe actually buys. (felhom.eu/REPORT.md §6 item 3 recorded it at 3/8 in one session.)
• Deterministic red-proof, in-tree: TestGeneratedCodeSegments_FilteredVsUnfiltered drives the generator against a fixture list where every word is hyphenated, so the pre-fix defect reproduces with probability 1 instead of ~1/5, and shows the same list through joinSafe refuses to generate.
• New for audit: WordlistFilteredOut(), RecoveryCodeSep. WordlistSize() now reports the effective (filtered) draw space, 7772.

v0.92.1 — ship the guestnet sudoers grant with the binary (supersedes v0.92.0) (2026-07-21)

Supersedes v0.92.0; that artifact is materially incomplete — do not vouch it. It was published before live verification revealed the watchdog had no sudoers grant for three of its four probes, so it carries neither the FELHOM_GUESTNET alias nor the guestnet-* capability rows that make a host missing that alias visible. Left in place rather than overwritten — a published version stays immutable (the v0.91.0 → v0.91.1 precedent).

No behaviour change beyond the capability rows; the watchdog code is byte-identical to v0.92.0. The functional fix is configs/felhom-agent.sudoers, which must be deployed with the binary.

v0.92.0 — the guest network gets a watchdog (R-54) (2026-07-21)

Host-tier only — no controller coupling, no wire change the hub must understand today (the guest_net stanza is additive and stored opaquely, exactly like pbs_dr and wireguard).

Closes the OPEN RISK left by INCIDENT-guest-dhclient-killed-2026-07-20 §5: the guest's DHCP client is started once by ifupdown at boot and nothing supervises it. When it died on 2026-07-20 the guest kept working for another ~80 minutes on its unexpired lease; only when the lease expired did the address and the default route vanish, taking the Cloudflare tunnel, the hub reports, the catalog sync and the controller→agent channel with them — a 1h15m outage in which every observable signal said healthy for the first 80 minutes.

The design consequence, and the point of the whole package: liveness of the DHCP client is itself a probe. Waiting for the address to disappear is waiting out precisely that silent window. The watchdog therefore flags a DHCP guest unhealthy on pgrep -x dhclient alone, while the lease is still live and everything else still looks perfect.

internal/guestnet, built on the wg-tunnel/storage watchdog loop shape:

• Probes (four fixed-shape pct exec argvs, no shell anywhere, no guest data interpolated): address, default route, /etc/network/interfaces mode, dhclient liveness. Parsers are pinned to output captured live from guest 9201 on 2026-07-21 — including the literal backslash ip -o emits and the docker-bridge routes that must not read as a default route.
• Heals with the incident's restored invocation, verbatim, logged at INFO before it runs: pct exec <vmid> -- dhclient -pf /run/dhclient.eth0.pid -lf /var/lib/dhcp/dhclient.eth0.leases eth0
• Dampers, because this runs a privileged command inside a customer's container: two CONSECUTIVE bad probes before any heal (one blip is not a diagnosis), ≥10 min between heals per guest, ≤3 heals/hour, and an observe-only window while the guest (or the agent) has been up under 3 minutes.
• Refuses to act on a static guest (dhclient must never fight a static config — a static guest missing its address is reported loudly and left to R-50), on an unknown interface mode, on a guest it cannot probe, and when the guest list cannot be ownership-proven. The guest source is the pool-verified one (ListLXC ∩ the felhom pool, audit A1) — never a bare ListLXC, which under a broad token would run dhclient inside a co-tenant's container.
• A failed PROBE never reads as a dead client. pgrep exits 1 with empty stderr when there is no match; anything on stderr means the probe itself failed, which reads as unknown. Otherwise a missing pgrep would heal forever.
• Healthy cycles log a Debug line (v0.91.2's lesson, one day old): if the quiet path is silent, "no alarms" and "never probed" are the same evidence, and an inert watchdog is indistinguishable from a working one.
• Deliberately NOT in the errc fan-out — a watchdog over customer guests must never be able to terminate the agent. A test asserts that, because joining the fan-out would also make the shutdown drain bound off by one.

Config guest_net is this repo's first DEFAULT-ON feature gate, and the inversion is deliberate. Every other gate defaults to false because those features reach outward (an offsite endpoint, an OOB tunnel) and enrolling a box by an update would be wrong. This one looks only INWARD at guests the agent already owns, and the failure it prevents exists on every box today. A watchdog that must be remembered per box is a watchdog that is missing on the box that needed it. Opting out is the explicit act: "guest_net": {"disable": true}.

Naming deviation from the spec, deliberate: TASK-D called the report block WireGuestNet. In this repo Wire* is the DOWN direction (WireDesiredState / WirePBSDR — what the hub sends), and UP-direction report stanzas are *Status. It ships as GuestNetStatus so it is not the one report block named against the convention.

• Wiring is asserted from package main by an AST walk (construct + SetGuestNetReporter + the started goroutine) — the v0.91.0 defect was exactly a seam whose caller was never written, with every unit test green. Red-proof: un-wiring both lines fails the test with both reasons named.
• Red-proof for the detection itself: reverting classify to IP-presence-only makes the July-20 fixture report "healthy" and records zero heals — the 80-minute silent window, reproduced.
• Ships a sudoers change (configs/felhom-agent.sudoers MUST be deployed with the binary). TASK-D assumed none was needed; live verification on felhom-pve proved otherwise — the first sweep logged dhclient liveness probe failed: sudo: a password is required and correctly reported state=unknown rather than acting blind. The existing grant covered only lanresolver's address read. FELHOM_GUESTNET adds four fixed vectors (route, interfaces, pgrep, and the heal), every argument after the numeric vmid a literal, so no hub or guest input can widen it. The address read is not duplicated — it stays FELHOM_DNSMASQ's.
• Four guestnet-* capability rows so a host missing that sudoers file is VISIBLE as degraded rather than silently watchdog-less. Non-critical on purpose: a missing grant must not page an operator for every box on rollout day (the R-50b amber-fleet lesson).
• var version in main.go was stale at 0.89.0 (three releases behind); builds set it via ldflags, but go run and any forgotten -X reported a version that had not existed for days.

v0.91.2 — a healthy credential probe is observable (2026-07-21)

The probe logged only on failure, so a healthy one was silent — which makes "no auth_failed" indistinguishable from "never probed", and leaves the leg impossible to demonstrate as running. That is precisely how v0.91.0 shipped it inert without anyone noticing. Adds a Debug line on success naming the storage: free in normal operation, one log level away when it matters.

v0.91.1 — wire the credential probe (v0.91.0 shipped the seam inert) (2026-07-21)

Supersedes v0.91.0; that artifact is materially incomplete — do not vouch it.

v0.91.0 built the pbs.AuthSink seam and the NoteAuthResult consumer, and main.go never called SetAuthSink. The reporter deliberately skips probing when no sink is attached, so the whole auth-honesty leg was silently inert: no probe, no auth_failed, no self-heal — and nothing failed, because every unit test injected the sink directly.

Caught during STOP-1 live verification by checking the wiring rather than trusting it. Exactly the same class as the controller v0.154.0 defect the day before: a table test over a seam proves the seam, not the caller. The published 0.91.0 artifact is left in place and superseded rather than overwritten — a published version must stay immutable.

• main.go: pbsReporter.SetAuthSink(pdMgr) in the pbsdr bridge block.
• TestLiveReporter_NoSinkMeansNoProbe pins the no-sink-no-probe contract, so the inert case stays a documented behaviour rather than an accident nobody notices twice. The wiring itself is proven by the live STOP-1/STOP-2 evidence, which is the only thing that can prove it.

v0.91.0 — the DR tier can no longer be applied and dead at the same time (R-39 fleet fix + R-50b(a)) (2026-07-21)

Requires hub >= v0.68.0 for the re-arm signal. Hub v0.68.0 is safe for 0.90.0 agents (they drop the unknown descriptor key), but the guarantees below need THIS agent. MinAgent → 0.91.0 is an operator manifest save, sequenced after the fleet has self-updated — not a code change.

What was broken

Three compounding defects let a box report applied while every PBS request 401'd:

1. The re-key was invisible. An ep0 re-issue rotates the SECRET of an existing token, so token_id, fingerprint, datastore and namespace all come back byte-identical. The agent re-applies on the descriptor's CONTENT HASH, so a converged box short-circuited and never consumed the fresh secret. Proof from the N100: consumed-failed.json carried a hash byte-identical to the marker.json written two minutes before the re-issue.
2. The agent could not read its own credential. It WRITES /etc/pve/priv/storage/<id>.pw through the root wrapper, but that directory is 0700 root:www-data and the wrapper had no read verb — so pbsTargetsFromPVE got "permission denied" every cycle, logged a Warn and skipped the datastore. The one loop that could have caught the 401 was blind by construction.
3. Nothing probed authentication. A snapshot list that fails with 401 looked exactly like "PBS is busy".

The fix

• WirePBSDR.SecretGeneration — field-exact with the hub's descriptor. Because descriptorHash marshals this struct, the hub's monotonic mint counter is what finally moves the hash and re-arms a converged agent.
• Wrapper read verb (+ exactly ONE sudoers line, + a pbsdr-read capability row). Prints one secret to STDOUT and nothing else: no network, no mutation, no logging of the value, and the secret never rides argv (sudo logs argv). Traversal is refused three times over — the id grammar admits no slash, val_sdir pins the directory, and the RESOLVED path is prefix-asserted.
• pbs.ProbeAuth — GET /version, the cheapest authenticated question, with a distinct ErrUnauthorized sentinel. /version needs no datastore, namespace or privilege, so a 401 there means the CREDENTIAL is bad — not that an ACL is narrow. 403 is deliberately NOT treated as unauthorized: re-keying a too-narrow token would mint credentials forever without fixing anything.
• The probe runs on the 15-minute collect path (not the 6 h verify cadence) and its verdict becomes a LOUD auth_failed state the hub's pbsdrheal escalates to a fresh mint. A transport error is UNKNOWN, never a rejection — otherwise every network blip would burn a credential. Recovery is self-clearing.
• readPBSSecret now prefers a directly-readable file and falls back to the wrapper, so a box with its own agent-owned secret dir needs no sudo at all.
• R-50b(a): the report carries the installed wrapper's sha256, so drift against the vouched manifest value is finally answerable. Empty = unknown, never drift.

Tests

Scenario A (a re-key re-arms a converged agent) with the hash mechanism asserted separately; the unknown-field compat direction; auth_failed loud/ignored-for-other-storage/none-before-descriptor/ self-clearing; and the wrapper read verb executed under real bash — traversal refusals, secret to stdout only, missing-file refusal, side-effect freedom.

Three red-proofs run at the assertion level. Removing SecretGeneration makes the re-arm test fail with consume calls=1, want 2. Swallowing the probe result leaves State:applied AuthFailed:false — the July-18 shape exactly. Deleting the id charset guard alone does not open a traversal hole (readlink + the prefix assertion still catch it), so the isolating red-proof removes the charset guard AND the prefix assertion and shows the out-of-tree secret printed.

docs — the workflow moved to DooPlex-local execution (2026-07-19)

Docs only, no version bump, no code change. Claude Code now runs on DooPlex (192.168.0.180, Debian 13, kisfenyo) instead of the Windows workstation, working directly in /mnt/5_hdd/felhom.eu/git/felhom-agent.

• CLAUDE.md — the build/deploy table is now local-first: build on DooPlex, then one hop scp /tmp/felhom-agent-<v> felhom-pve:/tmp/. The old path went build-server → Windows box → felhom-pve, needing cygpath -w for the local scp path; that two-hop detour and its CRLF hazard are gone (recorded in the new "Legacy: Windows workstation" note, not deleted).
• New clean-tree gate before any build: git status --porcelain empty AND HEAD == origin/main — the CC working tree is now the tree that gets built. An unpushed change does not exist.
• MSYS_NO_PATHCONV=1 is no longer needed for pct (it was an MSYS path-mangling workaround); ssh felhom-pve is plain now. Selftests run locally on DooPlex against the demo API.
• Workspace-root pointer updated to /mnt/5_hdd/felhom.eu/git/CLAUDE.md.

Historical Windows references in past CHANGELOG entries and PLAN.md are left untouched.

build tooling — the golden bakes EVERY infra image, asked from the controller (2026-07-19)

No agent version bump: configs/build-golden.sh only (v2.0.0 → v2.1.0). Effective at the NEXT golden build — the current golden is NOT rebuilt for this.

• The bug, observed live twice. Enabling Megosztás on a fresh box pulled felhom-samba from the registry with zero feedback: minutes of silent nothing. Cause: this script carried its own hand-maintained array of three image tags, with a comment instructing the reader to keep it in sync with the controller's internal/infra constants. It drifted the moment a fourth stack was added — felhom-samba was never added here, so the golden baked 3 of 4.
• The fix is structural, not another copy. The list now comes from the controller image the bake just pulled: docker run --rm <controller> --print-infra-images (backed by infra.Images(), which derives from the pins themselves). The golden therefore bakes exactly what that controller version will request, and the two cannot disagree by construction. A controller-side test parses the const block out of the source and fails if a pin is added without reaching Images().
• Ordering fix that this exposed. docker logout + config.json removal ran immediately after the controller pull. felhom-samba lives on the same private registry, so the infra loop would have 401'd. The logout moved to after the loop, with an added hard assertion that no credential remains in the guest before it is archived — the credential is still never baked.
• Fallback, loudly. A controller older than v0.147.0 has no --print-infra-images; the bake falls back to the historical 3-image list and prints three WARN lines saying felhom-samba will not be baked and Megosztás will pull at runtime. The fallback is exactly the drift-prone thing this change removes, so it announces itself rather than passing silently.
• ROADMAP: golden ≥ 0.147.x carries all four infra images.

v0.90.1 — R-39 hotfix: PBS reconcile must not pass --server to pvesm set (2026-07-18)

Config-only fix (wrapper + red-proof); the Go binary is unchanged. Ship the wrapper with the next agent deploy — configs/felhom-pbs-apply is a shipped artifact, not a build input. Green: go build ./... && go vet ./... && go test ./... all pass.

• The defect. The reconcile verb built its argv as args=(--server "$server" --fingerprint "$fp"). PVE treats a PBS storage's server as a create-only parameter and rejects the ENTIRE pvesm set call — can't change value of fixed parameter 'server' — even when the value passed is byte-identical to the stored one. So reconcile could never succeed against an existing entry; it exited 255 every time.

• Why that was severe rather than cosmetic. The agent consumes the hub's one-time PBS token secret BEFORE invoking the wrapper. A wrapper failure therefore burned the credential: each hub "Re-issue PBS credentials" minted a fresh secret, the agent consumed it, the wrapper rejected the apply, and the storage entry stayed pinned to the revoked one. Observable end state: the PBS DR tier authenticating 401 Unauthorized indefinitely while the agent reported pbsdr: converged state=applied. Live-diagnosed on the N100 demo host during the 2026-07-18 rehearsal wrap (felhom.eu/documentation/tests/VALIDATION-n100-rehearsal-2026-07-18.md, finding F2 / ROADMAP R-39).

• The fix. Drop --server from the reconcile argv. The server address is immutable by construction — relocating a PBS endpoint requires a fresh create — so there was never anything for reconcile to reconcile there. --fingerprint (and --password when a secret is fed) remain, which is the mutable identity the verb exists to push. Proven on the live box before committing: pvesm set felhom-pbs --server <same> --fingerprint <same> → rejected; the same call without --server → rc 0.

• Red-proof TestReconcileNeverPassesServerToPvesmSet (internal/pbsdr/manager_test.go): isolates the reconcile) block from the shipped wrapper and asserts no --server reaches pvesm set, plus that --fingerprint is still pushed (so the verb can't be hollowed out). Verified RED against the unfixed wrapper and GREEN after the fix. Two traps the proof handles explicitly: the pattern is line-ending tolerant (\r?\n) because this repo is cloned on Windows and an \n-only pattern would match nothing and pass vacuously; and comment lines are stripped before matching, because the WHY note above the fix necessarily quotes the very flag the test forbids.

• NOT fixed here (deliberately, and each still open):

  1. R-39's primary half — the agent re-applies on a change of the descriptor hash (manager.go ~L235), but a hub credential re-issue leaves the descriptor byte-identical (same token_id, same fingerprint; only the side-table secret rotates) and bumps only the generation. So a converged agent still ignores a fresh secret. This wrapper fix means the apply now succeeds once the agent is made to re-apply; it does not make it re-apply.
  2. The verify-loop read — pbs: cannot read token secret … permission denied: the non-root agent reads /etc/pve/priv/storage/<id>.pw directly, a path it can only ever write through the root wrapper (/etc/pve/priv is 0700 root:www-data, and sudoers exposes only create|reconcile|grant — there is no read verb). The loop is therefore permanently blind to the failure it exists to catch. Both ride the spec'd R-39 agent train.

v0.90.0 — agent train: guest RAM resize (R-24) + fast-tick-until-convergence (R-28) (2026-07-17)

MinAgent coupling: felhom-controller v0.143.0 gates its guest-memory-resize UI on this agent (FeatureGuestMemoryResize, MinAgent 0.90.0). One train, one floor raise (Viktor's ruling). Green: go build ./... && go vet ./... && go test ./... all pass.

• Item 1 — guest RAM resize (R-24, controller-direct) (internal/localapi/guestmemory.go, new): a new self-scoped local-API surface — GET /guest/memory (current allocation, live usage, and the enforced bounds, all agent-computed in MB) and POST /guest/memory (bounded resize). The agent is the security boundary: every bound is recomputed FRESH per request from a live read (the UI's numbers are decoration). Ruled bounds — min 2048 MB; max host_total − 2048 MB (host reserve); a SHRINK is refused below max(2048, usage + 512 MB) with below_usage_floor (stop apps first). Applies via the PVE API SetConfig — a live cgroup apply, no reboot (Phase-0 PROVEN on the nested demo box: maxmem moves with the guest running, /proc/meminfo ripples via lxcfs). Verify-after-apply: the new maxmem is re-read and must equal the target before success is claimed (a pending/reboot outcome is a 502, never a false success). Refusals return a machine code (below_min/above_max/below_usage_floor)
  • fresh bounds at 412; SetConfig is never called on a refusal path. Single-flight per host. Optional Options.Memory (nil → 503 "not configured"); a NEW narrow MemoryOps interface (does not touch the shared GuestAPI). Wired in main.go from the existing proxmox client. Memory only; cores stay observation.
• Item 2 — fast-tick-until-first-convergence (R-28) (internal/fasttick/, new): the agent-plane immediacy SECONDARY. While ANY desired-state item is unapplied — most importantly the pre-tunnel WG-registration window a hub poke cannot reach — it pulses the SAME out-of-band report trigger the watchdog/poke use, every 30 s, and self-disarms emergently the instant everything converges. State-based by ruling: nothing to journal, no timer to leak. Four cached sources (no exec/network per tick): desired-generation == 0 (never fetched); reconcile LastResult actionable drift (Planned − Pending > 0 — a destructive pending_signature is EXPECTED, excluded); pbsdr waiting_secret ONLY (the LOUD consumed_failed/verify_failed are excluded so a stuck box never hammers); wgtunnel block-desired-but-not-operational. Supporting seams: reconcile.Engine.LastResult() (mutex-recorded per pass) and wgtunnel.Manager.TunnelConvergence() (cached snapshot refreshed at each Apply — the fast-tick never execs wg/systemctl). A perma-unconverged box fast-ticks at ~2 small reports/min (bounded, documented; timers were deliberately rejected).
• Guests-0/0 (diagnosis passenger): REFUTED the pool-membership hypothesis on the live nested box — guest 9201 IS a pool member, the agent token sees it (VM.Audit comes from the /pool/felhom grant), hub reports 1/1. The observed 0/0 was the legitimate pre-provision reporting window (no guest existed yet); the existing PoolAddVMID re-assert (bringup.go:498) already covers the known restore-over-existing edge (campaign-2 R2). Item 2's fast-tick is exactly the window's mitigation. No code change.
• Tests + red-proofs (run-fail-restore): localapi memory (grow/shrink, the three refusals each with a SetConfig-count == 0 assertion, cross-guest 403, fresh-bounds-per-request, verify-not-reflected 502, nil-config 503) — red-proofs (i) floor guard removed → below_usage_floor fails; (ii) max guard removed → above_max fails. fasttick (pulse-while-unconverged, silent-when-converged, the ruled disarm-on-convergence, full-channel non-blocking drop, first-reason) — red-proof (iii) always-pulse → the silent + disarm tests fail. Engine.LastResult effect + pre-first-run ok=false. All restored green.

v0.89.0 — agent train: PBS-DR self-grant (R-22) + escrow config live-reload + agent-plane poke listener (2026-07-16)

Three bundled agent-plane items. Green: go build ./... && go vet ./... && go test ./... all pass.

• Item 1 — pbsdr self-grant (R-22, closes the F4 root cause from tests/VALIDATION-n100) (internal/pbsdr/manager.go): on a NON-DEFAULT PBS storage id the agent token holds no ACL on /storage/<id> yet, so the reconcile tick's token-auth pre-check StorageEntry (GET /storage/<id>) 403s and — pre-fix — aborted BEFORE the root-run wrapper grant that creates that very ACL: a permanent self-deadlock that bit every legacy/descriptor-provisioned id (the demo's felhom-offsite). Fix: on an IsForbidden pre-check error ONLY, run felhom-pbs-apply grant <id> now (root, no secret, no pre-existing entry — pveum acl modify on a path is unconditional), re-read once, then flow the normal adoption/create path. The pre-check is KEPT (once the ACL exists it short-circuits the happy path cheaply); every other error stays transient. Grant-then-still-failing surfaces verify_failed loudly, never a silent retry storm. Red-proof: TestSelfGrant_PreCheck403DoesNotAbortBeforeGrant (fake 403 on the pre-check → pre-fix never reaches the grant, calls=[] → FAIL; fixed → self-grant + converge, no secret consumed).
• Item 2 — escrow config live-reload (internal/localapi/escrow_ceremony.go, cmd/felhom-agent/main.go): the pbsdr bridge seeds escrow.pbs_storage_id into agent.json on DR convergence, but /escrow/preflight read a daemon-start snapshot and stayed red until a service restart. New late-bound EscrowCeremonyConfig.CurrentPBSStorageID resolver (mirrors the existing DRConfigured func() bool pattern) re-reads config from disk at preflight time — exactly what the ceremony subprocess itself loads, so the row flips green in-process, no restart. Falls back to the boot snapshot on read error / all-env config. Red-proof: TestEscrowPreflight_PBSStorageIDLiveReload (seed after boot → pre-fix stays red → FAIL).
• Item 3 — agent-plane poke listener (Direction-2a, SPIKE-immediate-sync-transport-2026-07-16) (new internal/poke, internal/wgtunnel.LoadAssignedAddr, cmd/felhom-agent/main.go, internal/hub/loop.go): a CONTENTLESS UDP poke relayed hub → ep0 forced-command → wg0-origin → this listener fires ONE immediate desired-state cycle (the hub control loop's out-of-band report trigger — the SAME channel the storage watchdog uses; fan-in, cap-1 coalescing). The socket binds EXCLUSIVELY to the box's WG /32 (registered.json; never 0.0.0.0, never the LAN iface) on the fixed port 51822; payload is ignored entirely (a forged/replayed poke costs at most one extra debounced tick); leading-edge debounce (DebounceWindow) coalesces a burst into ≤1 tick. Enabled whenever wg_tunnel.enabled; a lost poke is harmless (the 15-min cycle still reconciles). This is the FIRST concrete slice of the OOB/mutual-repair arc (R-13) — the listener+trigger only, nothing more. Red-proofs: TestBindConfinement (wildcard bind → bound to :: → FAIL) and TestDebounceCoalescesBurst (guard removed → 10 fires for 10 pokes → FAIL). Port registered in REUSE.md as a shared cross-repo constant (hub sender + ep0 felhom-poke).

v0.88.0 — controller-driven escrow ceremony: --output=json + localapi job + one-shot R claim (2026-07-13)

The agent half of the customer-facing recovery-code wizard (controller v0.127.0; every mechanism validated by felhom.eu SPIKE-controller-escrow-2026-07-13 — PTY-under-no-TTY, fixed-argv sudoers 5/5 refusals, R pipe round-trip, env_reset, 2.3–2.4 s timings). Operator ruling F1 (2026-07-13): R transiting the CF tunnel once at display is an accepted, documented risk (threat-model paragraph in RUNBOOK-escrow-ceremony.md).

• --output=json machine mode (cmd/felhom-agent/main.go): runSelftestEscrowCreate's body extracted into the shared escrowCeremony() core; text mode stays BYTE-IDENTICAL (banner, R block, exit codes 0/1/2, upload-fail-after-R order). json mode emits ONE escrow.CeremonyOutput object on stdout (version 1: recovery_code, key_fingerprint, entropy_bits, blob/identity sizes, restic_pw_sealed, uploaded), every human line to stderr, no partial JSON on failure; --offline/--paperkey are refused in json mode (print-oriented).
• The ONE fixed argv (internal/escrow/ceremony.go): escrow.CeremonyBinary + escrow.CeremonyArgs() — the single source shared by the localapi exec, the capability manifest entry, and (byte-identically) the new FELHOM_ESCROW sudoers alias (configs/felhom-agent.sudoers). TestEscrowCeremonyArgvPinned + TestManifestCoveredBySudoers transitively lock runner == manifest == sudoers; never build the argv with flag helpers, never normalize --→- (spike §2.2).
• localapi ceremony endpoints (internal/localapi/escrow_ceremony.go, withGuest-wrapped): POST /escrow/ceremony (single-flight 409; detached job, 60 s timeout; sudo -n + the fixed argv; stdout parsed then zeroed — SECRET-BEARING, never logged), GET /escrow/ceremony/status (non-secret summary + stderr-tail failure detail ≤500; R structurally absent from the job struct), POST /escrow/ceremony/claim (ONE-SHOT: 200 {recovery_code} once → holder zeroed; 410 on re-claim; TTL 10 min → unclaimed_void, active AfterFunc belt + lazy check), GET /escrow/preflight (storage id, DR tier, age, hub target, staged-secret informational, sudo -n -l grant list-probe). Crash-safety is IN-MEMORY BY DESIGN — an agent restart loses R safely (re-run supersedes); no journal, deliberately.
• Capability escrow-ceremony (Critical, GatedBy: pbs_dr EXPLICIT — non-pbsdr name by decision): list-mode probe of the shared argv; inactive (never red) while the DR tier is off.
• Tests: one-shot claim + double-claim 410, TTL void + zeroed holder, R-substring absent from every status/snapshot payload (incl. the serialized job struct), single-flight, supersede on re-run, failure taxonomy (exit/unparseable/version), preflight truth table, argv pin. §10 red-proofs demonstrated (see felhom.eu REPORT).

v0.87.0 — SystemDisks device-mapper walk: legacy-boot hosts get a working drive wizard (IA finding 2, MEDIUM) (2026-07-13)

On a legacy-boot PVE (LVM root, no mounted ESP) SystemDisks resolved NOTHING — wholeDiskOf stops at /dev/mapper/pve-root — so the all-system fail-safe classified EVERY disk system and the drive wizard could never offer a candidate (the IA validation's hot-added 5 GB disk stayed invisible on the drill box). Operator ruling 2026-07-13: walk the root's backing device through /sys/block/<dev>/slaves recursively down to physical disks (dm AND md; topology, never VG names); those + any mounted-ESP holder are system; the all-system fail-safe returns to being the WALK-FAILURE error case only. SAFETY DIRECTION: the outcome made impossible is a root-backing disk classified candidate — per-branch conservatism means ANY unresolvable slave fails the whole walk (ok=false → all-system, the unchanged code path).

• physicalDisksOf + walkSlaves (internal/storage/role.go): symlink-canonicalize → fast-path wholeDiskOf (raw disks/partitions, unchanged) → recursive sysfs slaves walk for virtual devices, with cycle/depth guard; non-/dev sources (ZFS datasets, NFS, overlay) stay unwalkable → fail-safe. Partition slaves resolve via the existing regexes (sda3 → /dev/sda); exotic partition names the regexes don't cover (e.g. md0p1) fail the walk → fail-safe.
• HostReader.BlockSlaves(name) — the ONE new seam method (root-free: sysfs is world-readable): slaves list + hasDir; production reads /sys/block/<name>/slaves; every test fake mirrors it. Live-probed (§3): physical disks carry an EMPTY slaves dir — hasDir alone is not resolution; a virtual device with an empty/unlistable slaves dir fails the walk.
• Behavior deltas: legacy-boot LVM hosts now resolve ({root's physical parents}, ok=true) — the wizard lives (still behind the untouched data-bearing/claim guards); EFI(+LVM) hosts are byte-identical (ESP and walk agree on the same disk — §3 felhom-pve transcript + fixture); md-raid roots mark BOTH members system. NEW protective delta: a host whose ROOT topology cannot be fully grounded is now all-system even if an ESP resolved (pre-fix it silently trusted the ESP alone; ruling's per-disk conservatism).
• Tests (role_walk_test.go, fake-sysfs fixtures mirroring the §3 transcripts): the SIGNATURE table (root-backing disk(s) ALWAYS in the system set across legacy-LVM / md-raid / EFI+raw / EFI+LVM / nested dm-on-md — never weaken), dead-wizard-lives (A), dangling-slave fail-safe through the REAL sysKnown=false path (D), cycle guard, empty-slaves. Red-proofs recorded: A pre-fix resolver → dead wizard reproduced; B walk-returns-dm-node → SIGNATURE VIOLATION naming the missing disk; D conservatism removed → "scratch classified candidate while walk incomplete".
• Format/mkfs paths, data-bearing guards, wizard UI: UNTOUCHED. MinAgent/controller coupling: none (agent-internal classification).

v0.86.0 — DR-tier-by-default: capability inactive state + F-3 provision-parent ownership (2026-07-12)

Agent half of the DR-tier-by-default batch (DRILL-day0-vm-2026-07-12; operator decisions: DR capability is BAKED on every install, activation is a hub flag, disabled ≠ degraded).

• Capability inactive state (internal/capability): a third status next to ok/degraded — a config-GATED capability whose plumbing is HEALTHY (binary present, sudo granted) but whose feature is off reports inactive / reason disabled by configuration. The 3 pbsdr-* entries are gated (GatedBy=GatePBSDR, applied by the stable name prefix in Manifest()); broken plumbing (binary missing / grant denied) stays DEGRADED even with the gate off — an un-migrated pre-v1.15.0 box must never look deliberately disabled. Summarize counts only real degraded (inactive never error-logs); the startup self-check logs an inactive count and now runs AFTER the pbsdr gate wiring so its snapshot matches the first report.
• pbsdr.Manager.DRConfigured() — the gate's answer: true when the last-seen descriptor was enabled (any live state except disabled); before the first desired-state fetch it falls back to the persisted converged marker, so an applied box never flaps to inactive across a restart.
• F-3 — provision parent-dir ownership (internal/provision/backhalf.go): a ROOT-run provision (the Day-0 one-shot) now chowns the just-created guests/ + guests/<vmid>/ PARENT dirs to the state-dir's owner (chown --reference, NON-recursive — the bootstrap leaf stays the mapped guest-root's). Previously they were left root:root 0700 → the non-root daemon's lanresolver got "permission denied" (drill live-fix now also applied to felhom-pve, which had the same latent state; Peti's host unreachable — deferred). A daemon-run (non-root) provision skips it (geteuid seam).
• Tests + red-proofs: gate-off-healthy→inactive / gate-off-broken→degraded / gate-on→ok / exactly-pbsdr-gated; DRConfigured lifecycle (incl. marker-across-restart + disabled-wins); root-run parent chown issued, non-root not, never recursive. All three mutations proven red.
• Shipping note: configs/felhom-pbs-apply already lives in this repo — host-install v1.15.0 (felhom.eu) now ships it like the mkfs/selfupdate wrappers (drill F-7); no publish change here.

v0.85.0 — the boot/recovery plane: F12 ordering-cycle fix + F11/F10/F9/F2/F1 + appliance self-heal (2026-07-12)

Fixes the findings CAMPAIGN-3 (felhom.eu/documentation/audits/CAMPAIGN-3-2026-07-11.md) raised around the NAS automount lifecycle — the data plane held, the reboot/recovery plane did not.

• F12 (CRITICAL) — boot ordering cycle. internal/storage/netmount.go: BOTH rendered units drop After=/Wants=network-online.target. The .mount keeps _netdev (the correct, sufficient network ordering — systemd classes it remote-fs); the .automount gets NO network relation (a trigger needs none, and it must stay orderable before local-fs without dragging the network into the transaction). The literal ordering had closed the cycle networking→local-fs→automount→network-online→networking, which systemd broke by deleting an arbitrary job — one boot lost networking entirely (host dark 7 h), the next lost the automount. Installed-unit migration: MigrateNetworkUnits — a general template-drift reconcile (SHA-256 content compare of each marker-owned unit vs a fresh render of its reconstructed spec; rewrite + one batched daemon-reload; idempotent). Runs at daemon startup before the reassert sweep and at the head of EnsureNetworkMount, so pre-0.85 units carrying the cycle are repaired, not just future adds.
• F11 (HIGH) — read the right unit. internal/storage/netreassert.go netReassertClassify: the re-arm decision is driven ONLY by the host /proc/mounts fstype at the mountpoint. Active nfs4/cifs → skip-active (inherited by fresh namespaces); anything else → re-arm. The .automount unit's own state is never consulted (an armed trigger always reports active — the mis-skip trap).
• F10 (CRITICAL) — re-arm for real. A .mount/.automount left failed/start-limit-hit (the campaign's unexport→idle-timeout→access×5) is reset-failed FIRST (new sudoers verb) — without it the enable --now is refused by the start limit and the share stays dead across every boot. The failed-state read is unprivileged (systemctl is-failed, seam-injected).
• F9 (HIGH) — say what you did. The pass enumerates by marker-owned unit files on disk (not enablement/runtime state) and logs an INFO verdict line for EVERY share (reasserted / reset-failed+rearmed / skip-active / skip-foreign / error) — an empty-looking sweep over N shares is now impossible.
• F2/F1 (LOW) — zero residue. RemoveNetworkMount (and, via the same path, every verify-fail rollback) reset-failed's the pair before removing the files (no not-found failed residue) and rmdirs the now-empty mountpoint (F1 — the campaign's 10 stub-shaped leftovers). rmdir ONLY: a non-empty dir is left in place with a WARN (fail-safe; never rm -rf).
• The hook can never take a guest down (F10/rc255). cmd/felhom-agent/main.go runHookPhase: every guest-hook phase runs recover-wrapped under a hard timeout and returns cleanly (a panic → logged to the PVE task log, swallowed; an overrun → abandoned). The installed wrapper snippet no longer execs — it runs the binary as a child, || true, and exit 0 (the shell belt).
• Appliance-mode node self-heal (Part 6). New internal/selfheal package: a minimal check/remedy registry gated on deployment_mode. One heal ships — host networking recovery (F12-class defense in depth): Healthy ⇔ networking.service active AND a default route; the remedy (systemctl start networking.service, new sudoers verb, ≤3 attempts, 10/30/60 s backoff, terminal give-up logged) runs ONLY on deployment_mode:"appliance". A byo host runs the check + WARNs; the remedy is structurally unreachable (the Manager gates before any exec). Absent/unknown mode → byo (fail-safe). Give-up is log-only (no natural HostReport field; the report schema is out of scope) — the ERROR lands in the always-DEBUG applog ring for a hub bundle-pull.
• Config: top-level deployment_mode (internal/config, +FELHOM_AGENT_DEPLOYMENT_MODE overlay, IsAppliance() fail-safe-to-byo). NOT overloaded onto Privileged.Mode.
• Sudoers (loud, per the no-widening rule): two narrow additions — systemctl reset-failed -- mnt-felhom* (F10) and rmdir /mnt/felhom-drives/* (F1, fail-safe: rmdir refuses a non-empty dir) in FELHOM_NETMOUNT; systemctl start networking.service as the new FELHOM_SELFHEAL alias (appliance self-heal; the grant alone cannot harm — starting networking is what boot should have done; the remedy is ALSO code-gated on appliance). Capability manifest gains the three representative probes.
• Tests: F12 render (no network-online, _netdev present) + reconcile (drift rewritten once, idempotent, batched reload, round-trip) + foreign-unit ignore; reassert fstype table with the automount-state-ignored red-proof, reset-failed+rearm, per-unit verdict count; hook rc-0 under panic/timeout; zero-residue (reset-failed + rmdir, never rm -rf); selfheal state machine + byo-never-invokes + absent⇒byo. All green.

v0.84.0 — ReassertNetworkMounts: NAS automount survives guest reboots (RCA fix 1) (2026-07-11)

Agent half of the RCA fix pair (controller v0.117.0). Source: felhom.eu/documentation/audits/AUDIT-nas-cwa-rca-2026-07-11.md — a fresh guest namespace inherits REAL submounts (ext4/nfs4) but NOT an idle autofs trigger, so after any guest reboot an idle NAS share silently degrades to a local stub inside the guest. The heal (re-create the automount → the fresh trigger-mount event propagates live into running guests) was live-proven in the RCA remediation; this release makes it automatic.

• internal/storage/netreassert.go SudoHostOps.ReassertNetworkAutomounts: per configured network mount, the §8 decision table — real nfs/nfs4/cifs mounted → skip (inherited); autofs trigger at the path → stop + enable --now the .automount (existing FELHOM_NETMOUNT sudoers verbs; there is NO restart grant); neither → skip (removed/orphan states owned by add/remove). Idempotent; per-share errors never stop the pass. Unit enumeration factored into networkUnitEntries() (shared with ListNetworkMounts, behavior unchanged).
• internal/localapi/netreassert.go Server.ReassertNetworkMounts: the daemon leg — runs the host-global pass once, then best-effort verifies each RUNNING guest actually sees each share path (GuestSeesMount; the RCA's masking lesson). Type-asserted capability (the lean NetworkStorageOps interface and its fakes stay unchanged — the main.go ReassertEnrolledMounts pattern). Wired at agent startup after ReassertGuestBinds; deliberately NOT in the 20 s ticker (an idle trigger is healthy and must not be churned).
• internal/guesthook/netreassert.go + PhasePostStart: the hook leg — PVE runs the hookscript as root, so guest-hook <vmid> post-start re-arms triggers with DIRECT systemctl and verifies via GuestSeesPath (hook-process mirror of GuestSeesMount). Non-fatal by contract (stderr → PVE task log; exit 0 always); 30 s bound. The installed wrapper snippet already forwards all phases — no snippet re-install needed.
• Tests + red-proofs: §8 table (red-proof: always-rearm shape → FAIL "nfs → rearmed, want skip-active" — the live-mount churn the table prevents); rearm emits EXACTLY stop+enable-now on the right unit; active mount → ZERO systemctl calls; idempotent double-pass; hook wiring (red-proof: PhasePostStart case removed → FAIL "got []"); daemon leg verifies running guests only; invisible-share verify is WARN-only (non-fatal).

v0.83.0 — observability pass: always-DEBUG capture ring + GET /debug/logs + heartbeat log-pull + gap-fill sweep (2026-07-11)

Agent half of the cross-repo observability task (controller v0.116.0 + hub v0.46.0). Motivating incident: a refused NAS verify on an info-level box left NOTHING readable remotely — the agent logged only to host journald and the new features emitted few lines.

• Capture layer (internal/log): applog.New now returns (logger, *Ring) — a slog fan-out where stderr keeps the configured level (journald unchanged) and a ~1000-entry ring handler is FIXED at LevelDebug, so flow detail exists for remote pulls without a config flip. The ring is an io.Writer fed by a stdlib TextHandler; entries are parsed (time/level/message-verbatim). Red-proof: ring gated at the emit level → capture-at-info test FAILS ("ring holds 1, want 2").
• GET /debug/logs (local API, same token-auth/self-scoping wrap as siblings): the ring as JSON {entries, total}; ?raw=1 plain text; 503 when unwired. Plus a request-level DEBUG middleware (method/path/status/duration — never bodies) wrapping the whole mux.
• Heartbeat log-pull (the report-channel logtail.go pattern mirrored): the control envelope gains log_tail_requested: bool (additive); when set, the NEXT heartbeat carries log_tail: {collected_at, lines[]} (newest-kept, 128 KB cap). Consume-once both ends: local pending drains onto the carrying push; a FAILED push leaves the hub request pending → the next envelope re-arms (retry proven in tests; red-proof: drain removed → tail ships every cycle → FAIL). Serving a pull logs operator log pull served (INFO — customer-visible transparency).
• Gap-fill sweep (entry, decisions, outcome+duration, errors): netverify (job start, trigger outcome, /proc/mounts verdict, journal byte-count, classification code, rollback outcome, duration), netstorage add (pre-probe pass verdict, creds staged/removed — path only), netmount Ensure/Remove (per-unit install/enable/remove-step results), signedjobs (jobs fetched ids+ duration, op received class/host/expiry — never signatures), selfupdate executor (invariants passed, download sha-match+duration), disks (assign/eject/decommission outcome INFO), ReassertGuestBinds (pass summary), controller-swap (pre-pull verify, negative health verdict), desired syncer + hub loop (per-exchange DEBUG with durations).
• S7 log-sequence smoke: a full fake NAS add at emit level info must leave the ordered phase markers in the ring (red-proof: dropping the /proc/mounts verdict line → FAIL naming the phase).
• No new sudoers grants, no journald scraping, no streaming — pull-only. Demo-deploy only — NOT published (Peti stays 0.81.0; this reaches him with the next publish train).

v0.82.0 — local-API version channel: X-Felhom-Agent-Version on every response (2026-07-11)

The controller's capability detection upgrades from route-probing to version comparison: the local-API mux is wrapped so EVERY response (any route, any status, including auth failures) carries X-Felhom-Agent-Version = the build version (localapi.Options.AgentVersion, wired from main.version). The controller (v0.115.0) reads it passively from ordinary traffic and compares it against a per-feature MinAgent table; header-less (≤0.81.0) agents keep working — the controller falls back to the v0.114.0 route probe unchanged. No new routes, no envelope changes, no sudoers changes. Test: header asserted on authed/unauthed/404 responses (red-proof: wrap dropped → fails); empty version emits NO header. Demo-deploy only — NOT published (Peti stays 0.81.0 = the live fallback path).

v0.81.0 — NAS verify-before-commit: retry=0 + detached verify job + journal classification (2026-07-11)

Implements the agent half of the "NAS verify-before-commit" task on the SPIKE-nas-verify-2026-07-11 evidence (felhom.eu/documentation/audits/, commit b57f6c1). POST /netstorage/add no longer succeeds blind — a bogus share can no longer sit at "Készenlét" forever.

• retry=0 in the production NFS option string (netmount.go mountOptions; Q4-vi): a dead-NAS on-demand access now fails clean in ~4 s (ENODEV) instead of wedging the accessing app until systemd's 90 s start cap; verify failures classify as "No route to host" instead of a diagnostic-free timeout. SMB string unchanged (retry is a mount.nfs option). Already-installed units are NOT rewritten (pre-customer; re-add re-creates them).
• internal/storage/netverify.go — ClassifyNetVerifyFailure: pure, table-driven journal classification on the Q4 VERBATIM substrings → unreachable | nfs_export | smb_auth | smb_share | timeout | mount_failed. nfs_export deliberately MERGES not-found/not-permitted (NFSv4 returns the identical string for both — Q4 ii≡iii). Everything exits rc=32, so classification is string-based by design.
• Detached verify job (localapi/netverifyjob.go, the formatjob shape but IN-MEMORY single slot): add = decode → role-gate → SYNC fast-fail (full spec validation + 2 s TCP pre-probe; an unreachable server is refused with NOTHING installed) → stage SMB creds → EnsureNetworkMount → detached verify (trigger read through the automount; mount success judged from /proc/mounts only — never readability, a 0700 export EACCES is a good mount) → on failure: journal-classify
  • auto-rollback (RemoveNetworkMount + creds file). GET /netstorage/verify-status reports the slot; phase none after an agent restart is the controller's rollback signal (Scenario F — deliberately not persisted). Single-flight: a second add while verifying is a 409.
• Journal access is UNPRIVILEGED (journalctl -u <unit> -n 20 -o cat, no sudo, no new sudoers grant): requires the felhom-agent user in the systemd-journal group (host-install ≥ v1.12.0 successor adds it; existing hosts: usermod -aG systemd-journal felhom-agent). Journal unavailable degrades to mount_failed + a hint, still rolled back.
• New exported helpers: storage.NetworkMountedAt (autofs trigger ≠ mounted), storage.NetworkEndpointReachable (the 2 s pre-probe). REUSE.md updated.
• Tests: classifier table on the live Q4 strings, §8 truth table, rollback effects, pre-probe zero-install, single-flight + no-job shape. Red-proof outcomes recorded in REPORT.md.

v0.80.0 — PBS DR tier SLICE 2: the apply-bridge (2026-07-10)

Consumes hub v0.44.0's pbs_dr desired-state descriptor (slice 1): hub tick → the box grows the pbs storage entry + K, hands-free. Laws encoded (spike 00afadc + the offsite bridge precedent), each red-proof-verified (REPORT.md):

• internal/pbsdr — the bridge (wgtunnel Loop shape; raw-consumer seam; report stanza pbs_dr). Flow: adoption probe first (existing healthy entry → grant + marker, NO consume; tenancy identity is entry-owned — a descriptor naming a different namespace never repoints a live entry: the demo's manual felhom-offsite case) → fresh path: verify-pin-BEFORE-consume (bare TLS dial pinned to the descriptor fingerprint, pbs.ProbeFingerprint) → consume (POST /api/v1/hosts/{id}/pbs/consume-token, PLURAL /hosts/ — the slice-1 route; typed ErrNoPBSSecret) → wrapper create (secret on STDIN; --encryption-key autogen → K born; .enc/ .pw placed into backup.pbs_secret_dir when overridden — the spike §4 escrow-path flag) → grant (the Part-0-evidenced dual-grant, exactly) → post-apply active probe → seed escrow.pbs_storage_id (bare ceremony one-liner; an operator-set different value is never clobbered; unknown config keys preserved) → descriptor-hash marker. Consumed-but-failed is LOUD: persistent consumed_failed report state, no silent retry — recovery only via the hub Re-issue (a fresh staged secret).
• configs/felhom-pbs-apply (root wrapper, /usr/local/sbin, the guarded-mkfs shape) + ONE pinned sudoers alias FELHOM_PBSDR (create/reconcile/grant). THE SET-ONLY LAW: no deletion verb exists (entry deletion destroys K = un-decryptable backups); re-apply is pvesm set-only — grep-gated by TestSetOnlyLaw over the shipped file. Secret via wrapper stdin (sudo logs argv).
• Wire: WirePBSDR on WireDesiredState (field-exact with hub pbsDRDescriptor, pinned by TestWireFieldNames); nil-safe on pre-v0.44.0 hubs. Report: PBSDRStatus stanza (adopted/ applied/waiting_secret/verify_failed/consumed_failed/disabled) via the PBSDRReporter seam.
• Capability manifest: pbsdr-create/pbsdr-reconcile/pbsdr-grant (non-critical, the selfupdate rationale). config.Config.SourcePath records the loaded file for the escrow seed.
• Part 0 (recorded in REPORT.md): status reads ride FelhomAgentBase (Datastore.Audit@/); the WRITE path 403s without FelhomAgentStore on /storage/<id> → the grant op = the §4b dual-grant exactly. Demo's purged grants re-asserted; token vzdump to the PBS entry live-proven OK.

v0.79.0 — SLICE 3: escrow upload carries sha256 of the sealed restic password (2026-07-09)

The hub-verified escrow auto-confirm chain, agent third: the escrow-create ceremony now records WHICH offsite repo password the blob covers — as a non-reversible sha256 (a 256-bit random secret's hash is safe to store/serve; the password itself is never logged or uploaded).

• internal/escrow.HashResticPassword — the CANONICAL hasher: sha256 hex over the TRIMMED password string (exactly the value AttachResticPassword seals into the blob). Pinned cross-repo test vector (TestHashResticPassword_PinnedVector, same vector asserted in felhom-controller) so the two hashers can never drift silently.
• cmd/felhom-agent: escrowUploadRequest gains restic_pw_sha256,omitempty — set only when a staged password was folded in (no staged file → field OMITTED → the hub stores NULL → the controller stays pending; correct, the blob doesn't cover the key). TestEscrowUploadContract updated (the hub mirrors it in the same commit-pair) + asserts the omitted-when-unstaged behavior.
• Ceremony flow (create / self-verify / R-banner / staged-file wipe) otherwise untouched.

v0.78.0 — fork-4 hygiene: DELETE /escrow/stage-secret (staged-secret wipe) (2026-07-09)

Part of the offsite-provisioning hardening bundle (pairs with controller v0.107.0 + hub v0.39.0). The staged restic repo password was wiped only by the escrow-create ceremony; a confirm WITHOUT a fresh ceremony (the password already escrowed — the live e2e's Option A) left the 0600 staged file behind indefinitely.

• internal/localapi: DELETE /escrow/stage-secret (withGuest) — removes the staged file (+ any stale .tmp partial). Idempotent: absent file → clean 200 {removed:false}. The controller calls it whenever EscrowState flips to escrowed. No value ever logged (nothing to log — it's a removal).
• Test: stage → wipe (file GONE) → re-wipe idempotent → 401 unauthenticated.

v0.77.0 — fork-4: escrow the offsite restic repo password under R (2026-07-09)

Makes the restic-offsite repo password recoverable at DR by riding the existing customer-recovery-code (R) zero-knowledge escrow (age-under-R, alongside the IdentityBundle), validated by felhom.eu/documentation/audits/SPIKE-restic-password-custody-2026-07-09.md. Additive; the PBS-K escrow path is untouched.

• internal/escrow/identity.go: IdentityBundle gains ResticRepoPassword (restic_repo_password,omitempty) — rides the existing WrapIdentityBundle/UnwrapIdentityBundle age-under-R path (self-verified by escrow.Create). Added AttachResticPassword (mirrors AttachWGKey), StagedResticPasswordPath, and WipeStagedResticPassword. Pre-fork-4 blobs lack the field and CANNOT be retro-fitted (R never retained) — the controller's atomicity gate ensures no offsite ciphertext exists until the key is escrowed.
• internal/localapi: POST /escrow/stage-secret (withGuest, scopedFromBody) transiently stages the controller-pushed restic password (0600, atomic tmp+rename, never logged — field name only, value never echoed), overwritten on re-push. Stage path injectable via Options.EscrowStagePath (default the canonical StagedResticPasswordPath) for testability.
• cmd/felhom-agent/main.go (runSelftestEscrowCreate): the escrow-create ceremony auto-injects the staged password into the IdentityBundle (mirrors the WG-key auto-inject) and wipes the staging file after a successful create. The ceremony stays operator-invoked (--selftest=escrow-create).
• Tests: IdentityBundle round-trip carries ResticRepoPassword byte-exact + not-in-blob + wrong-R fails closed; AttachResticPassword (missing/present/empty); stage endpoint stages 0600 + non-secret ack + cross-guest 403 + value-not-in-log.
• NOT yet live-validated — the supervised escrow ceremony (enable→stage→escrow-create→confirm→gated run) is the operator-run follow-up.

v0.76.0 — restore-test full-fidelity verification (GL-5b / go-live G12) (2026-07-08)

Closes GL-5 finding #2's mirror image: the restore-test's live-source-config bind-override path tripped the same PVE drop-unlisted-mountpoints rule DR did, so it boot-verified scratch guests WITHOUT their storage mpN — weaker verification than it claimed, and GL-6 will lean on it. 0.75.0 was superseded unpublished; this is the Day-0 manifest bump target.

• Archive-derived params: the restore-test now derives its restore params exactly like DR bring-up — ExtractArchiveConfig + drRestoreOverrides (the ARCHIVE is the object under test, not any live guest's current config): rootfs explicit, every storage mpN passed through (its content genuinely extracted — full fidelity; the added runtime IS the verification), structural binds → throwaway stand-ins. Unreadable archive config / unknown bind topology → refuse UP FRONT (never restore a partial guest to "verify" it).
• Mount-parity assert (the non-hollow core): pre-start, the restored scratch's mpN set is compared against the archive's — a missing, mispathed, undersized, or extra mpN FAILS the test naming the delta. PVE rule (b) can never regress into a green light again. MountParity ("ok"|"mismatch") + MountInventory ride the result and the hub wire record (additive keys — an older hub ignores them).
• Dead code deleted with its tests: bindMountOverrides, archiveVMID + the volid regexes (the restore-test was their only caller; a reachable dead lookalike is how the next bug happens). throwawayVolumeOverride/rootfsSizeGB/mountPathOf live on under drRestoreOverrides.
• DR bring-up, 4d, KeepMAC, grows, caps: untouched (bringup.go had zero line changes — the §13 DR re-run trigger did not fire).
• Tests: Scenario A (exact 5-param derivation from the archive + parity ok + inventory + teardown), B (dropped mp0 → FAIL naming it, never started, still torn down; RED-PROOF: with the parity assert removed the run passes silently — run→fail→revert), C (extract-failure + unknown-topology refusals, no restore attempted), D (provision/DR bring-up tests all green, byte-untouched); mountParity pure-function matrix (parity/missing/mispathed/undersized/extra/trivial).
• Live validation + publish: REPORT.md (full-fidelity runtime measured vs the ~3m data-less shape; AGENT_VERSION/AGENT_SHA256 recorded verbatim for the operator's manifest bump).

v0.75.0 — DR bring-up structural bind overrides + real-bind swap (GL-5 / go-live G8) (2026-07-08)

Implements the verdict of felhom.eu/documentation/audits/SPIKE-dr-bindmount-source-2026-07-07.md: bring-up -mode dr of a customer archive FAILED outright because the archive carries the two structural host-bind mountpoints (mp8 parent bind, mp9 bootstrap bind) that a pct restore under the privsep token cannot recreate ("restoring 'mp8' to bind mount is only possible for root") — bring-up passed no MountOverrides. Provision was never affected (the golden has no mp8/mp9; the back-half adds them) — that asymmetry was the bug.

• DR restore overrides (internal/reconcile/bringup.go): ModeDRGuestLoss synthesizes throwaway 1G-volume overrides for the two PLATFORM-CONSTANT mpN (mirroring backhalf.go's values; the spike's whole point — no archive parse for the LAYOUT) via the shared throwawayVolumeOverride format helper (extracted from bindMountOverrides; the restore-test's is-a-bind FILTER reads live configs, which DR by definition has none of). ModeProvision passes nil — regression-contract test.
• LIVE-DISCOVERED: PVE's explicit-params restore is ALL-OR-NOTHING (neither half was in the spike — it never ran an override restore). (a) mpN params without an explicit rootfs → HTTP 500 "mount points configured, but 'rootfs' not set" (same rule restoretest.go:211 documents). (b) Mountpoints NOT named in the params are silently DROPPED — the first live run came up boot+running WITHOUT its mp0/mp1 data volumes (2m56s; the customer's world did not ride along). Fix: NEW Client.ExtractArchiveConfig (GET /nodes/{node}/vzdump/extractconfig — answers 200 under the scoped agent token, verified live; PBS keys stay server-side, the spike's candidate-1 rejection holds) + drRestoreOverrides derives the COMPLETE param set from the archive's own embedded config: explicit rootfs, every storage-backed mpN passed through (size + path + backup preserved → vzrestore extracts its content), structural binds → throwaways. Unknown bind mpN / unparseable size / unreadable config → clean refusal before any restore. Snapshot sections never shadow the current config.
• Step 4d — real-bind swap (DR only, pre-start): mp9 bootstrap host dir created (idempotent — a same-host guest-loss still has bootstrap.json there, untouched), then mp8/mp9 set to the REAL binds via the host runner (pct set — bind mounts are root@pam-only, hence NOT the API; sudoers already allowlists both shapes), one slot per call so a failure names the exact mpN and rolls back per the committed/launched envelope (C2 — never a silent half-wired success). The displaced throwaway volumes (PVE parks them as unusedN) are deleted via one config PUT (delete=); a scoped-token refusal logs the residue LOUDLY + warns in the result instead of widening privileges. NEW proxmox.GuestConfig.Unused().
• Engine seam: EngineOptions.HostRunner + StateDir (DR refuses up front on an API-only engine); the bring-up selftest wires the same ExecRunner shape as the back-half and removes the scratch vmid's mp9 host dir at teardown (never a real drive's bind source).
• Tests (non-hollow): Scenario A exact-override + exact-swap-command + unusedN-delete asserts; provision-nil regression; C2 mid-swap rollback; C3 older-archive-without-mp9; DR-without-runner refusal; extract-failure refusal; 403-residue warn; archive rootfs parse (snapshot sections never shadow). Red-proofs: override synthesis reverted → A FAILS; unconditional overrides → B FAILS (both run→fail→revert).
• Live validation (campaign-2-precedent scratch DR into vmid 9310 from a real 9201 local archive, auto-teardown, guest 9201 untouched): pre-teardown pct config shows mp0 200G + mp1 50G restored (7m23s — content genuinely extracted), mp8/mp9 = the REAL binds (exact back-half values), rootfs 32G explicit, ZERO unusedN; boot+running; teardown clean incl. the scratch mp9 host dir. On v0.74.0 the same op failed at the restore POST. Full evidence: REPORT.md.

v0.74.0 — pool membership re-asserted after restore-over-existing (campaign-2 R2) (2026-07-07)

Closes campaign-2 finding R2 (felhom.eu/documentation/tests/CAMPAIGN-2-2026-07-07.md). Pool membership is what lets the pool-scoped FelhomAgentGuest token reach a guest (the grant applies only to pool MEMBERS). pct restore --pool sets membership at CREATE, but a restore over an existing VMID (the host-loss/finale path) never re-applies it — and no code re-added a guest to the pool — so every destroy-restore silently dropped membership, and the NEXT --selftest=restore-test/DR 403'd on VM.Audit/VM.Allocate. That empty-pool state is the true root cause of the campaign's "R1" (the bind-mount restore failure was a symptom: with no config-read, restore-test's existing, correct bind-mount neutralization never ran).

• Client.PoolAddVMID(ctx, pool, vmid) (internal/proxmox/mutate.go): PUT /pools/{pool} vms={vmid} — PVE-additive (merge, not replace), idempotent (already-member swallowed), needs Pool.Allocate (the token has it). Sync — no UPID.
• bring-up re-asserts (internal/reconcile/bringup.go): after liveness is proven, if spec.Pool != "", call PoolAddVMID. A pool-add hiccup is surfaced as a LOUD warning + res.StartWarnings but must NOT flip a healthy running guest's verdict (membership matters for the NEXT op).
• B3 (scratch teardown 403) — diagnosed, no code: restoretest.go already passes Pool: DefaultPool for scratch restores, so the campaign's VM.Allocate teardown 403 was a CASCADE of the bind-mount restore failing (half-built guest outside any pool), not an independent gap. A re-run on the healed pool confirms.
• Tests: PoolAddVMID PUT shape + idempotency + real-error-surfaces + validation (pool_test.go); bring-up re-asserts when Pool!="" (red-proof: pre-fix no-call → FAIL, demonstrated), no-pool→no-call, pool-add failure warns-but-passes (liveness wins, guest kept). Role/ACL untouched — the fault was membership, not privileges.

v0.73.0 — F2 mount-role fallback: enrolled user-data drives are ejectable/decommissionable again (2026-07-06)

Closes campaign finding F2 (felhom.eu/documentation/audits/CAMPAIGN-nomercy-2026-07-06.md + RERUN addendum). roleForMountPath (internal/localapi/disks.go) resolved a mount's protection role ONLY from the PVE storage view (Observe), but a bind-mounted RAW enrolled user-data drive is not a PVE storage → no MountPath match → fail-safe RoleSystem → the eject/decommission role gates 403'd every user-data drive in the standard topology (journal: where=/mnt/teszt_enroll role=system). Customers could not eject or decommission their own drives.

• Fallback mirrors durableIDForMount's Impl-2b: after the MountPath loop misses (on a SUCCESSFUL Observe), resolve the mount's backing device from the host mount table and classify device-keyed — non-/dev source (NAS) → system; device on the same whole disk as a KNOWN target → THAT target's role (containment, via new storage.SameWholeDisk, whole-disk granularity so a protected disk can't be ejected through this path); else RoleForRawDevice. Fail-safe preserved: an Observe error returns system BEFORE the fallback (a blind containment pass could label a backup drive user-data — permissive), and a mount-table-read failure or an absent/NAS mount → system.
• Scope: only roleForMountPath; gates, deviceRole, DecommissionExecutor, classify.go, ReassertGuestBinds untouched; the deviceRole/roleForMountPath unification is deferred.
• Tests (f2_role_fallback_test.go): A1 ejectable + decommission effects; B1 containment→403; B2 system-disk→403; C1/C2 fail-safe; C3 Observe-error skips the fallback. Three red-proofs demonstrated (pre-fix→A1 FAIL, containment-skip→B1 FAIL, fallback-on-error→C3 FAIL). Existing RoleGated/ Decommission tests green unmodified.

v0.72.0 — OOB operator access: rendered operator /32 + dedicated felhom-sshd + port-adaptive belt + oob health (TASK H1) (2026-07-05)

The agent half of the merged E1+H1 operator-SSH-access feature (hub half = felhom-hub v0.35.0). Provenance: felhom.eu/documentation/audits/SPIKE-{felhom-sshd,oob-wg-operator-peer}-2026-07-05.md. Live-validated on felhom-pve + the dev endpoint (both spikes' key probes re-run as acceptance).

• Operator /32 rendered into wg-felhom (internal/wgtunnel/manager.go renderConf/allowedIPsLine): oob_peer_ip from the desired-state block is appended to AllowedIPs, deterministically SORTED (byte-stable conf-hash — no per-tick flap). RENDERED, not a runtime wg set, so it survives the agent's self-heal ([OF-1]; live-proven: tunnel stopped → self-heal → operator SSH still works).
• Dedicated felhom-sshd (internal/felhomsshd/): a SECOND sshd on a claimed non-22 port ([8822,2222,8022,62222], LOUD-fail on exhaustion [SF-4]), own config/host-key/AuthorizedKeysFile (/etc/felhom-sshd/authorized_keys/%u, outside ~/.ssh [SF-3])/unit — COEXISTS with the customer's :22 (never touched). Config: render→sshd -t→reload (never restart-on-change [SF-2]); operator authorized_keys from the hub block; reset-failed-then-restart heal with a 10-min cooldown, NEVER restarting onto an invalid config. configs/felhom-sshd.service SAFE — no RuntimeDirectory= [SF-1].
• Port-adaptive belt (internal/felhomsshd/belt.go + configs/felhom-oob.nft): a STATIC inet felhom_oob table; the agent mutates ONLY its SETS — @operator_ips + @ssh_port [trap 4] — so felhom-sshd's port is reachable ONLY from the operator /32 over wg-felhom (off-tunnel + box↔box dropped at the host; :22 untouched). Idempotent; a nil/unfetched block never empties it (no operator lockout).
• OOB health (internal/felhomsshd/health.go): the additive oob heartbeat stanza (felhom_sshd_active/port/reachable/config_invalid/operator_peer_configured/operator_key_configured/ wg_handshake_age_s) — reaches the hub over HTTPS even with felhom-sshd/tunnel down. reachable = a listener check (the belt blocks a dial); operator_*_configured from persistent state (belt/authorized_keys), accurate immediately after a restart.
• Sudoers: FELHOM_SSHD (config/authkeys install + sshd -t/-T + scoped systemctl) + FELHOM_OOB (nft SET-element ops only — never a rule grant). oob.enabled config DEFAULT FALSE.

v0.71.0 — management-plane break-glass: privsep-dir watchdog + mgmt_plane health (TASK G1) (2026-07-05)

Prerequisite for the felhom-sshd OOB feature (H1). Closes the lockout from felhom.eu/documentation/audits/SPIKE-felhom-sshd-2026-07-05.md §8: a second sshd's RuntimeDirectory=sshd removed the SHARED /run/sshd privsep dir and took the stock sshd on :22 down too (sessions reset right after SSH2_MSG_KEXINIT) — a management lockout on a healthy box. Three independent layers; this repo ships the host artifacts + the agent reporter (hub vault + surfacing are the felhom.eu half).

• Host artifacts (configs/, installed by felhom-host-install): felhom-privsep.tmpfiles (d /run/sshd 0755 root root - — layer 1, boot-persistent, owned by no unit's lifecycle); felhom-mgmt-watchdog.sh (layer 2 heal action — stat-first recreate /run/sshd, reset-failed ssh ONLY when failed, write an RFC3339 heal-marker; NEVER restarts the stock sshd, NEVER touches a healthy dir — shellcheck-clean); .service (oneshot) + .timer (~60s, Persistent). The healer is agent-INDEPENDENT — it self-corrects with felhom-agent stopped (the whole point). No unit declares RuntimeDirectory= (that IS the incident cause; the installer refuses any that does).
• Go (internal/mgmtplane/): a read-only Reporter (os.Stat /run/sshd + read the heal-marker + a short TCP dial to sshd:22) producing the additive mgmt_plane heartbeat stanza ({privsep_dir_ok, sshd_reachable, healed_recently, privsep_healed_at} — omitempty, the SelfUpdatePending precedent, no hub-schema change). Wired always-on via Collector.SetMgmtPlaneReporter. The hub raises a warning on a new privsep_healed_at so a recurring clobber surfaces BEFORE a lockout (complements host_staleness). Touches host /run + the stock sshd only — no guests.

Closes the update asymmetry: the root-adjacent agent was updated by manual SSH binary-replace while the lower-stakes controller already auto-updates. Design provenance: felhom.eu/documentation/audits/SPIKE-agent-selfupdate-2026-07-05.md (SF-findings binding). Core principle (as with the controller swap): the thing that performs rollback is never the thing being updated — here systemd + an ~80-line root wrapper.

• Trust model: an update is an operator-signed agent_update op (new reconcile.ClassAgentUpdate, always Destructive) through the existing signed-jobs pipeline; the signed params pin version + sha256, so the sha is the ONLY integrity root (hub = dumb transport, Gitea = dumb storage — neither can substitute a binary). felhom-opsign -op agent_update -agent-version <v> -sha256 <hex>.
• Host artifacts (configs/): felhom-selfupdate-guarded (apply/commit/rollback — root re-verify, path confinement, same-fs assert, .prev, atomic mv, pending marker, detached restart [SF-6]; rollback pending-guarded [SF-1]); felhom-agent-rollback.service (OnFailure oneshot); felhom-agent-limits.conf ([Unit]-only drop-in [SF-3] with the spike's tuned 120s/4 [SF-2] + OnFailure=); FELHOM_SELFUPDATE sudoers alias.
• Go (internal/selfupdate/): Executor (download → verify vs signed sha → sudo -n wrapper apply; job completed after verify+download, before apply); Manager (startup dwell → commit; version-mismatch → no-commit + WARN + marker-left; report seam SelfUpdatePending()). Wired as a 3rd executor-chain element + a MaybeCommit goroutine after core init. SelfUpdateConfig (url_template/creds/dwell, Token redacted). Additive report fields selfupdate_pending(+version) (omitempty → cross-repo golden contract byte-stable, no hub change). 3 non-critical capability probes.
• felhom.eu: felhom-host-install.sh installs the wrapper + rollback unit + drop-in on day-0 (self-update from birth); agent README "Self-update" section.
• Tests: executor (happy / sha-mismatch + companion / bad-params / wrapper-fail), gate ride-along (agent_update rides the LOCKED gate: pinned-key executes, non-pinned + retarget rejected), commit (dwell-commit / version-mismatch / no-pending / shutdown), opsign, classify. Wrapper covered by shellcheck + the live crash-rollback drill. Full go test ./... green.

v0.69.0 — S5: host-loss DR — recovered WG-key install + directive→restore-PLAN (safe halves) (2026-07-04)

The two safe, non-destructive mechanical links for host-loss DR (the destructive in-place restore is a separate operator-present, STOP-gated drill).

• internal/wgtunnel.InstallRecoveredKey — writes an escrow-recovered WG private key (32-byte base64, re-encoded canonical) to the key file so the tunnel re-establishes with the SAME identity/pubkey (→ the same hub /32), no fresh keygen. CREATE-ONLY — refuses if a key file exists (a present key may be a live identity); value never logged. Wired into --selftest=identity- consume -install-wg-key (opt-in; after UnwrapIdentityBundle, installs bundle.WGPrivateKey; pre-S3 blob with no WG key → logged fallback to fresh keygen + re-register, which keeps the /32).
• internal/dr (new) — consumes the host_loss restore_directive (was logged-and-ignored) into an inspectable RestorePlan via the desired.Syncer.AddConsumer raw seam: per guest → {vmid, archive, target storage, sizing}; per drive → {durable_id → expected mount}; + the offsite PBS coord. Derive-and-surface only — the Consumer has NO restore/destroy dependency, so "execute nothing" is structural. guest_loss/absent → no plan. Recipe fetched on-demand (rare directive) via a fresh Collect.
• Tests + red-proofs: WG install (same pubkey/no-keygen; present-key refuse — red-proofed against allow-overwrite); plan (host_loss builds; guest_loss/absent/nil-recipe → none — red-proofed against a relaxed mode gate). No secrets on argv/stdout/logs (field names only).

v0.68.0 — S4.1: tier-aware restore-task deadline (unattended offsite restore-test) (2026-07-04)

The offsite restore-test couldn't complete on the scheduler path because a WAN restore of a large guest exceeds the restore-task wait's 10-minute default — the wait expired mid-restore, teardown then fired against a still-restoring (not-yet-pool-associated) scratch guest, and it leaked. Make the restore-task wait tier-aware.

• internal/reconcile: RestoreTestSpec.RestoreTaskTimeout (0 → the 10m WaitOptions default); the restore-task WaitTask now passes it. Local-tier restores are UNCHANGED (10m — a local restore hanging that long is a genuine fault).
• internal/config: BackupConfig.RestoreTestPBSRestoreTimeoutSeconds + accessor RestoreTestPBSRestoreTimeout() (positive as-is, else 120m — for an unattended nightly test a false timeout is worse than a slow pass; very large guests may need more).
• cmd/felhom-agent: restoreTaskTimeout(cfg, tier) sets the field to the configured PBS timeout only when SourceTier=="pbs" (both the scheduler + selftest spec builds), else 0.
• Tests: tier-aware WaitOptions.Timeout (pbs→120m, local→0; red-proofed against WaitOptions{}) + the accessor contract. The "grant scratch-band VM.Allocate" follow-up was diagnosed, not blind-applied — the scratch guest is restored INTO /pool/felhom (whose ACL already grants VM.Allocate), so the earlier teardown 403 was a consequence of the timeout (a not-yet-pooled, still-restoring guest), not a missing grant. No ACL/host-install change. (Live confirmation of the phantom in REPORT.)

v0.67.0 — S4: namespace-aware PBS client (per-customer offsite tenancy) (2026-07-04)

Phase-1 live probe on felhom-hetzner proved the offsite tenancy path (backup/restore/list/isolation all green over the tunnel with a per-customer DatastoreBackup token) but surfaced that the agent's PBS client was namespace-unaware: Snapshots hit the datastore root (403 for a scoped token) and Verify was whole-datastore (needs Datastore.Verify ~ admin). Operator-approved small change to make the client namespace-scoped so a properly-isolated token services its own tenant.

• internal/pbs: Config.Namespace (+ Client.namespace). Snapshots appends ?ns=<ns> (lists ONLY the tenant's namespace); Verify sends ns=<ns> (verifies ONLY that namespace — Phase-1-confirmed to work with a DatastoreBackup token on its own ns, no Datastore.Verify / admin widening). Root-ns clients (Namespace="") are unchanged → whole-datastore (the DooPlex felhom-pbs n100 path). Test TestClient_NamespaceScoping pins both (red-proofed).
• internal/proxmox: Storage.Namespace (parsed from the PVE /storage config key namespace).
• cmd/felhom-agent: pbsTargetsFromPVE threads s.Namespace into the PBS client, so a PBS storage configured with a namespace is verified/reported scoped to it automatically.

Confirmed minimal tenant ACL (recorded live 2026-07-04, felhom-hetzner): DatastoreBackup on /datastore/felhom-offsite/<ns> (the namespace path — NOT /ns/<ns>) granted to BOTH the user felhom@pbs and the token felhom@pbs!<ns> — PBS privsep tokens = intersection(user, token), so both are required; isolation holds because each token's ACL is only its own ns (cross-ns list/backup → 403, proven). No token exceeds DatastoreBackup; no admin on the endpoint for the box.

v0.66.0 — S4 agent half: endpoint v4-pin + re-resolve watchdog + FELHOM_WG Critical flips (2026-07-04)

The two agent items S4 needs before offsite backups ride the tunnel (the tenancy + storage weight is runbook-side). No new sudoers grants; no wire/JSON change.

• internal/wgtunnel — v4-pin (doc 06 §4.2). renderConf now takes the pre-resolved IPv4 literal and writes Endpoint = <ip>:<port> — never the DNS name, never an AAAA. A new Resolver seam (net.DefaultResolver.LookupNetIP(ctx, "ip4", …) — A records only) resolves in the Manager; multiple A records → the numerically lowest (deterministic fleet-wide). renderConf stays pure (no DNS/IO inside). The resolved IP is cached: steady-state Apply hits the cache — zero DNS, zero execs (the load-bearing negative). DNS failure on (re)resolve → keep the last-applied conf + throttled ERROR — never a teardown (teardown stays revocation-only).
• internal/wgtunnel — re-resolve watchdog (doc 06 §4.2, the slice-3 promise). New Manager.Watchdog (loop-driven only, so Apply's zero-exec steady state is untouched): when the handshake age exceeds wg_tunnel.stale_after_seconds (default 180) it re-resolves; IP changed → re-render + restart (endpoint re-IP recovery); IP unchanged → no churn, one throttled warn (endpoint merely down). The staleness read is the existing wg show … latest-handshakes (never dump).
• internal/config — WGTunnelConfig.StaleAfterSeconds (default 180 via WithDefaults).
• internal/capability — FELHOM_WG Critical flips (S4). Backups ride the tunnel now, so wg-conf-install, wg-enable, wg-restart, wg-handshake-read are Critical=true (operator-alert-worthy on degradation); wg-tools-install (one-time) + wg-disable (deliberate revocation) stay non-critical. TestWGCapabilityCriticality pins the exact set (red-proofed).
• Tests: v4-pin golden (A literal, AAAA/dns_name refused), watchdog (healthy=no-DNS negative, stale+re-IP restarts, stale+same-IP no-churn+throttle, resolver-failure keeps conf, initial-resolve- failure no-teardown+recovery). Red-proofs a/b/d all fire.

v0.65.0 — S3.1 offsite-tunnel client MTU 1420 → 1280 (resolve the CGNAT-smoke MTU open decision) (2026-07-04)

One-constant fix closing 06 §4.3's OPEN DECISION. The 2026-07-04 CGNAT smoke test found the shipped interface MTU 1420 silently black-holes bulk TCP on any path below ~1480 B (mobile ~1400, DS-Lite ~1452): the WG handshake and ping stay healthy (small packets) while the PBS TLS page — and, at S4, the backup itself — drops. "Looks green, loses backups." Must be safe before S4 flows bulk TCP over the tunnel.

• internal/wgtunnel/manager.go: new const clientMTU = 1280 (the RFC 8200 IPv6-minimum link MTU — every path carries ≥1280; outer = 1280+60 v4 / +80 v6, fits every realistic path); renderConf emits MTU = %d from it. Fleet-wide, family-agnostic, permanent — decouples the fix from the v4/v6 endpoint-resolution question (§4.2). Client-only by construction: the interface MTU caps box→PBS and the advertised MSS (=MTU−40) caps PBS→box, so the endpoint's wg0 is deliberately untouched (zero live-endpoint risk). Rejected: auto-probe / per-connection-type (fragile moving part optimizing throughput, a non-metric here) and MSS-clamp (no forwarded flows).
• internal/wgtunnel/manager_test.go: golden pins exact MTU = 1280; red-proofed (flip const → 1420 fails the golden on the MTU line — non-vacuous).
• internal/hub/report.go: stale "MTU 1420" comment → 1280 (still NOT a wire field).
• No wire/JSON-golden change (MTU is a client-derived constant, never on the wire); no endpoint, hub, controller, key, or desired-state change.

v0.64.0 — S3 offsite WG tunnel: keygen + registration + agent-managed wg-quick@wg-felhom + escrow join (2026-07-04)

The agent half of doc 06 §3.3 (felhom.eu S1/S2 built the endpoint + hub half). DEFAULT OFF — the safety gate: wg_tunnel.enabled defaults to false; a v0.64.0 rollout without explicit config is a no-op (no keygen, no registration, no report stanza). Enabled explicitly on felhom-pve only; the default flips when the production endpoint exists.

• internal/wgtunnel (new; the lanresolver host-service shape): pure-Go keygen (x/crypto curve25519; key 0600 in 0700 StateDir/wg; corrupt file = refuse, NEVER overwrite — it may be the escrowed identity; stored form canonical-clamped — x/crypto clamps derivation internally, so the STORED bytes are the property that matters, red-proof-anchored); one-shot registration (POST /hosts/{id}/wg, marker-gated, exponential backoff cap 15 m); desired-state consumption via the new desired.Syncer.AddConsumer raw seam (panic-contained); conf render golden-tested (MTU 1420, AllowedIPs = pbs_tunnel_ip/32, keepalive 25 — doc 06 §4 client constants; all inputs strictly validated); hash-gated apply (steady state = ZERO execs), restart-not-reload on conf change, self-heal enable, adopt-lost-marker, re-key-on-mismatch. Revocation semantics (doc 06 §3.5 completed): block absent from a PRESENT desired-state → disable + marker KEPT + never re-register (the operator re-adds the peer using the reported pubkey); absent DATA (failed fetch) is never a teardown signal.
• internal/hub: WireDesiredState.Wireguard (field-exact with the S2 cross-repo golden, copied byte-identical + decode test), RegisterWG client (typed errors, token-free), HostReport.Wireguard status stanza {pubkey, registered, active, last_handshake_age_s, assigned_ip} via the collector's WireguardReporter seam.
• Sudoers/capabilities: Cmnd_Alias FELHOM_WG (fixed-path conf install, enable/restart/ disable, wg show wg-felhom latest-handshakes — the ONLY wg read; wg show … dump is FORBIDDEN, its interface line carries the PRIVATE KEY) + 6 manifest entries (Critical=false until S4 makes the tunnel load-bearing).
• Escrow: IdentityBundle.WGPrivateKey (omitempty) + escrow-create auto-inject when the key file exists (escrow.AttachWGKey; field NAME only in logs). Honest limit: pre-S3 blobs cannot be retro-fitted (R is never retained) — S5 DR falls back to fresh-key re-registration, which keeps the box's /32 (hub S2 re-key-in-place).
• --selftest=wgtunnel single-shot for supervised bring-up.
• Live-validated on felhom-pve (agent restart tolerance, host reboot with unit persistence, revocation drill, 30-min keepalive soak, escrow inject) — see REPORT.md. Five red-proofs run
  • reverted. GOTCHA learned: the hub envelope's poll_interval_seconds (hub-side constant 900 s) silently overrides the agent's configured cadence on the FIRST cycle — the agent-side poll_seconds is only the pre-first-heartbeat default.

configs: build-golden.sh v2.0.0 — mandatory controller tag + bootstrap .path unit (B5 + B1) (2026-07-03)

Golden-bake script only — no agent code, no binary, no agent version bump (docs/config precedent). Resolves drill findings B5 + B1 (felhom.eu/documentation/audits/DRILL-day0-cleanroom-2026-07-03.md §9) and closes the stale backlog note FOLLOWUP-golden-default-controller-tag.md.

• B5 — CONTROLLER_IMAGE (arg 6) is now MANDATORY — the hand-bumped default rotted twice (0.43.0 → 0.85.1 → stale again; 0.85.1 predates the v0.86.0 floor-honoring code, which is why every fresh install needed the manual D.1b update). No 6th arg → die with usage (red-proofed: exits 1 before any pct op). Auto-resolving "latest" was rejected — it could bake an unvouched tag.
• B1 — baked felhom-controller-bootstrap.path unit (PathExists=/etc/felhom-bootstrap/ bootstrap.json, enabled next to the service): the service's ConditionPathExists is evaluated only at boot, but the agent back-half hot-plugs the bootstrap mount into the already-running guest — the path unit starts the service when the file APPEARS, so the controller deploys with NO reboot (isolated systemd proof + full Day-0 proof on the clean-room drill VM; the installer's v1.9.1 post-provision reboot is now a redundant belt, kept). RemainAfterExit=yes on the service prevents re-trigger loops; the service itself stays unchanged.
• GOLDEN_SCRIPT_VERSION (2.0.0) + a [golden] provenance line (script version + baked controller tag) now open every bake transcript.
• Baked + published with controller 0.98.3: golden 0.98.3 / sha256 b9a02ef1b6f02b9b58babc4c6aad9cf6c053ebdfba116c78c8e7830de757fd01 (Gitea generic package, 201 + sha round-trip). Clean-room validation: bake integrity (mp0+mp1 included), isolated hot-plug proof, full local-golden Day-0 install (first boot = 0.98.3, self-update reports up-to-date, app deploy OK) — evidence: felhom.eu/documentation/audits/DRILL-golden-098-2026-07-03.md.

v0.63.0 — B3 + B2: fresh-install fixes — token reload-on-miss + guesthook snippets dir (2026-07-03)

The two agent-side gaps the Day-0 clean-room drill surfaced (felhom.eu/documentation/audits/DRILL-day0-cleanroom-2026-07-03.md findings B3/B2). Both are fresh-install path fixes; no behavior change on a warm box.

• B3 — TokenStore.Lookup reload-on-miss (localapi/tokenstore.go): provisioning is a SEPARATE one-shot process (--selftest=provision) that Mints the new guest's token into the shared append-only JSONL, while the long-lived daemon serves Lookup from an index built once at open — so the daemon 401'd every token minted after it started (the drill's POST /controller/swap: HTTP 401, until a manual systemctl restart felhom-agent). Lookup now re-reads the file ONCE on a miss (reloadLocked(), factored from load(); full re-read is idempotent under apply's last-write-wins) and re-checks. An append-only size short-circuit bounds the cost: an unknown token on an unchanged file is one stat, no re-read — never a reload loop. Fix is entirely behind the TokenAuthority seam (no server change). Fail-closed on an unreadable store; missing file loads as empty. Tests (tokenstore_test.go): cross-process-mint coherence (red-proofed: pre-fix shape returns (0,false)), exactly-once reload bound + size short-circuit, cross-process re-mint rotation coherence, deleted-file no-crash (linux-only; windows can't unlink an open handle).
• B2 — guesthook.InstallSnippet ensures the snippets dir (guesthook/install.go): a fresh PVE has no /var/lib/vz/snippets and install (without -D) won't create parents — the pre-start self-heal hook silently failed to install on every freshly-bootstrapped box (warn-only in the back-half). A fenced mkdir -p /var/lib/vz/snippets now precedes the install; sudoers gains exactly that one grant (FELHOM_GUESTHOOK — configs/felhom-agent.sudoers must ship WITH this binary, as always). Test: mkdir-precedes-install argv assertion (red-proofed: pre-fix has no mkdir op).
• Guide follow-through (felhom.eu, separate commit): D.1b's "restart the agent first" step drops once B3 is live-verified.

v0.62.0 — A1: pool-membership ownership check for the stale-lock reaper (2026-07-03)

Implements audit finding A1 (AUDIT-blast-radius-hostroot-localapi-2026-07-02 §A) per the spike verdict (SPIKE-a1-pool-membership-read-2026-07-03 — enumeration is pool-filtered under the scoped token, so this is defense-in-depth: a future broad-token deployment can no longer re-arm the reaper against co-tenant guests). Companion: host-install v1.9.0 (Pool.Audit added to FelhomAgentGuest) — rescope BEFORE deploying this agent, else the reaper fail-safes (skips) until the ACL catches up.

• Client.Pool (proxmox/query.go): GET /pools/{name} → PoolInfo{PoolID, Members[]{VMID,Type}}. Requires Pool.Audit at /pool/{name}; Pool.Allocate does NOT satisfy the read (spike T2).
• staleLockController.Guests() (localapi/stalelock.go): now returns ListLXC ∩ pool members (nonzero-vmid, non-storage entries only). Ownership is PROVEN via the pool registry, never assumed from enumeration scope. A pool-read failure returns a wrapped error ("pool membership read (pool=felhom): …") that rides the existing "guest list unavailable — skipping recovery" guard — fail-safe: NO unlock/snapshot-delete/start on ANY guest, never a fallback to the unfiltered list. One new INFO line per scan: stale-lock: scanning pool guests (pool, listed, scanned) — emitted by the controller (the unchanged StaleLockController seam can't carry the pre-intersect count).
• NewStaleLockController gains (pool string, logger *slog.Logger); main.go threads reconcile.DefaultPool.
• Capability surfacing: the hub-report prober is now a composed closure — the sudo manifest probe + one pve:pool-read status (non-critical; degraded ⇒ reaper is fail-safed, visible on the report, no operator page). Composed in main.go; internal/capability/ untouched.
• --selftest: new "pool read" line (pool id + member count + guest members).
• Tests (stalelock_pool_test.go, driving the REAL controller over a broad-token-shaped fake): TestStaleLock_ForeignGuestNotReaped (red-proved: intersect removed ⇒ FAILS with pct unlock 5000 recorded), TestStaleLock_PoolGuestStillReaped (anti-over-filter), TestStaleLock_PoolReadFails_SkipsAll (red-proved: fallback-to-unfiltered ⇒ FAILS with mutations recorded), TestStaleLockController_GuestsIntersect (storage-member + empty-pool edges). The 9 existing Server-level stalelock tests pass unmodified.

docs — CLAUDE.md refresh: stable orientation, complete layout (2026-07-03)

No code change, no version bump. Deleted the version-pinned "Current: v0.31.0" narrative and the per-slice history (stale by 30 versions — current state lives in CONTEXT.md/CHANGELOG top); Layout completed with the 8 missing packages (capability, desired, escrow, guesthook, lanresolver, localapi, provision, signedjobs + cmd/felhom-opsign — verified against the tree); build/deploy compressed to a summary table pointing at the felhom-build-deploy skill (commands verified live on felhom-pve: non-root felhom-agent user, /usr/local/bin/felhom-agent --config /etc/felhom-agent/agent.json). Load-bearing Proxmox-model rules kept verbatim. Standing rule: no version-pinned state in CLAUDE.md.

docs — REUSE.md introduced (2026-07-03)

Cross-repo reuse-map rollout (docs-only, no code change, no version bump). New REUSE.md at the repo root: curated map of canonical helpers (48 rows — exec/sudoers surface, format-safety guards, durable-id seams, stores, local-API plumbing), patterns, dangerous lookalikes (req.Device TOCTOU, raw mkfs, uuid:-vs-byid: scheme confusion, MemoryNonceStore, pool-blind stale-lock scan…), test seams, extension points, and observed duplication (7 clusters, NOT fixed). Every entry code-verified at file+symbol; cited paths machine-checked by felhom.eu/scripts/reuse_refs_check.py (green). CLAUDE.md gains the "See REUSE.md before writing new code" pointer + the same-commit maintenance rule.

v0.61.0 — blast-radius audit fixes B1 + D1 + D2 + D3 (2026-07-03)

Four LOW/INFO fixes from AUDIT-blast-radius-hostroot-localapi-2026-07-02.md — the "second gate must mirror the first" batch. Each shipped with a non-hollow test AND a companion red-proof (test shown failing on the pre-fix implementation). A1 (stale-lock pool-membership) is deliberately NOT here — it needs a pool-read spike (the role lacks Pool.Audit); C1/C2/A2/B2–B5/E1/E2 deferred.

• B1 (LOW) — random temp staging for root-installed scripts. internal/guesthook/install.go (InstallSnippet) and internal/localapi/intermediary.go (installSharedParentUnit, new shared stageTemp) staged root-executed scripts through FIXED, predictable /tmp names via os.WriteFile (no O_EXCL, follows symlinks) — a local TOCTOU into a root-run PVE hookscript / boot script. Both now use the os.CreateTemp random-name pattern lanresolver already used. configs/felhom-agent.sudoers (FELHOM_GUESTHOOK/FELHOM_INTERMEDIARY) install-SOURCE grants became globs (/tmp/felhom-guest-hook-*.sh, /tmp/felhom-shared-parent-*.{sh,service}; destinations stay pinned); internal/capability/manifest.go representative vectors updated to match. Tests: TestInstallSnippet_RandomTempName, TestInstallSharedParent_RandomTempName (fake runner records the install source: random pattern, two calls differ, content + cleanup asserted).
• D1 (LOW) — the guarded mkfs wrapper now mirrors the classifier's member/RO classes. configs/felhom-mkfs-guarded.sh re-checked only system-disk / LVM-PV (PATH-dependent command -v pvs) / foreign-mount — a bypassed agent could mkfs a ZFS/mdraid/LUKS/swap member or a read-only disk. Added (additive; nothing removed/reordered): /sys/block/<disk>/ro == 1 → die; an lsblk-FSTYPE loop over the whole disk refusing exactly claim.go's memberFSTypes (LVM2_member/zfs_member/linux_raid_member/crypto_LUKS/swap — the FSTYPE catch works with pvs absent); pvs resolved via absolute candidates (/usr/sbin/pvs, /sbin/pvs). Validated by the new scripts/mkfs-guarded-harness.sh on felhom-pve: throwaway loop devices + PATH-shimmed lsblk + a recorder bind-mounted over mkfs.ext4 in a private mount namespace (no real mkfs possible) — fixed wrapper 8/8 (incl. plain-blank-disk still formats); pre-fix wrapper red-proof: 7/8 hostile fixtures reached mkfs.
• D2 (INFO) — classifyClaim empty-lsblk fail-safe. A successful-but-empty lsblk ({"blockdevices":[]}) skipped the member/mount loop and returned unclaimed. internal/storage/claim.go now refuses when the node tree is empty OR the target whole-disk is absent from it (undeterminable topology ⇒ claimed). Tests: TestClassifyClaim_EmptyNodesRefused, TestClassifyClaim_TargetAbsentFromTree.
• D3 (INFO) — blank-format anti-retarget (AGENT-001's benign-branch twin). handleDiskFormat's blank branch formatted the mutable caller-supplied req.Device with no durable-id binding — a /dev re-enumeration between inspect and mkfs could format a data-bearing disk that inherited the node. The blank branch (internal/localapi/disks.go) now derives the device's durable id (no durable id ⇒ 409 refuse — path-only formats are not permitted), re-resolves it via the new antiRetargetResolveBlank (wipe_reresolve.go: shared antiRetargetResolveExpect core; the blank variant asserts the device is STILL !DataBearing), and formats the RE-RESOLVED device. The format job record (formatjob.go) carries blank; restart recovery re-checks blank jobs with the blank variant (durable-id-bound, fail-safe refuse). Confirmed/data-bearing branch untouched. Tests: TestFormatBlankPath_AntiRetarget_{ReassignedDataBearingRefused,ReassignedDifferentDiskRefused,UnresolvableRefused,SameBlankProceeds}, TestFormat_Blank_{FormatsReresolvedDeviceNotCallerPath,ReresolveRefusalNoMkfs,NoDurableIDRefused}.
• Deploy note: the host's /etc/sudoers.d/felhom-agent MUST be updated together with the v0.61.0 binary (the old fixed-name grants deny the new random-name installs, and vice versa).

v0.60.0 — proof-of-launch destroy gating + restore-test band-advance (campaign F1/F2) (2026-07-02)

Fixes the pool-effects campaign's HIGH finding (F1, CAMPAIGN-pool-effects-2026-07-01.md): the bring-up compensating rollback and the restore-test teardown fired DestroyLXC on the target vmid even when RestoreLXC failed synchronously WITHOUT creating anything (PVE refusing a pre-existing vmid the pool-blind duplicate guard / band scan couldn't see) — destroying a guest the transaction never made. Only the pool ACL's 403 saved the non-pool subset; an in-pool pre-existing guest would have been destroyed, and any broad-token deployment re-arms the bug. Root cause: SameTxnCreated/scratch provenance was ASSUMED, never verified against proof-of-launch. The fix makes a RestoreLXC UPID the sole destroy authorization, in ALL THREE destroy paths — the pool ACL is defense-in-depth again, not the guard.

• F1a internal/reconcile/bringup.go runBringUp: the compensating-rollback defer is gated on launched (set only after the restore POST is accepted). A synchronous restore failure (no UPID) closes the owning entry terminal-failed WITHOUT any destroy. The pre-restore OpStarted journal append is kept (crash-safety); rollbackBringUp is now only ever called launch-proven.
• F1b internal/reconcile/restoretest.go runScratchTest: same launched gate on teardownScratch — a synchronous restore refusal never destroys the picked band vmid.
• F1c internal/reconcile/recover.go Recover: the no-UPID "POST never confirmed → abandon fail-safe" check now runs BEFORE the Scratch/Rollback dispatch — a no-UPID Scratch/Rollback entry is abandoned (marked failed, NO destroy) instead of destroy-by-vmid-existence. Recover is now safe by DESIGN, not by the pool-blind "already gone" accident the campaign observed.
• F2 restoretest.go RunRestoreTest band-advance: a band vmid PVE refuses with "already exists" (an invisible squatter — new pveAlreadyExists, mirrors pveConfigLock, never misclassifies a real restore failure) is skipped and the next free band vmid tried (bounded by the band width; pickScratchVMID gained an exclude set). A fully-occupied band → Skipped (scheduler raises no "backup unrestorable" alert), never FAIL — one squatter no longer permanently breaks the restore-test.
• Accepted residual (by design): a crash in the one-statement window between obtaining the UPID and journaling it leaks a half-built guest Recover won't destroy — cleanable, and vastly preferable to destroying an innocent guest.
• Tests: red-proof companions verified (gates reverted → TestRunBringUp_NoLaunchNoDestroy, TestRunRestoreTest_RestoreNoLaunchNoTeardown, TestRecover_{BringUp,Scratch}NoUPIDAbandoned all fail with the innocent-guest destroy); no-regression …LaunchedTaskFailureStillTearsDown + rollback table now includes an explicit restore-task-failure case; F2 advance + squatter-full-band-skips tests. Live-validated on felhom-pve (provision onto existing 9001 → no destroy armed; restore-test advances past a 990000 decoy). go build/vet/test ./... clean.

v0.59.0 — report backing device + capacity for a registry-sourced drive in /disks (2026-07-01)

Completes the /disks representation for a registry-sourced (raw, no-PVE-storage) drive: the agent-view showed "—" for the device and no size bar, because the union row never populated backing_device or total_bytes/used_bytes (Observe drives get those from pvesm status, which a raw drive has none of).

• internal/localapi/disks.go handleDisks registry union: resolve BackingDevice from the fs-UUID (storage.ByUUIDDevicePath) and read capacity via statfsCapacity (new build-tagged capacity_linux.go = syscall.Statfs on the mount; capacity_other.go = no-op for dev builds).
• go build/vet/test ./... clean (Linux + Windows dev). Live: the registry drive now shows its device + size in the agent-view, matching the Observe-sourced drives.

v0.58.0 — report GuestPath/BoundUnderParent for a registry-sourced drive in /disks (2026-07-01)

Last piece of first-class raw-drive support: the /disks union row for a registry-sourced drive (Impl-2a — a drive with no PVE storage) omitted GuestPath + BoundUnderParent, so the controller read it as "Leválasztva" (disconnected) even though it was mounted + bound + live in the guest.

• internal/localapi/disks.go handleDisks registry union: populate GuestPath (StablePathForRaw)
  • BoundUnderParent (boundUnderParent) on the registry row, identical to the Observe path — so a registry-only drive reports its true bound/active state. go build/vet/test ./... clean.

v0.57.0 — re-assert a RAW drive's guest-bind (ReassertGuestBinds mount-table fallback) (2026-07-01)

Completes the raw-drive durability the v0.56.0 fix started. ReassertGuestBinds (the startup / drive- returned reconcile that re-binds an enrolled drive's felhom-data under the shared parent so it's live in the guest) built its durable-id→mount map from Observe() only — so a RAW enrolled drive was never found ("enrolled drive not present"), and its in-guest bind was not re-asserted after a reboot or a watchdog re-mount (the drive would show "Leválasztva" in the controller).

• internal/localapi/disks.go ReassertGuestBinds: augment the durable-id→mount map from the mount table — each raw /mnt/<name> mount → its device fs-UUID (HostReader.Mounts+ResolveUUID), skipping the /mnt/felhom-drives bind (AttachDrive wants the raw path). Observe entries still win. Also: an Observe failure is no longer fatal (fall through to the mount-table scan) so raw drives re-assert even if the PVE view is momentarily unavailable.
• Wiring fix (latent): buildLocalAPIServer never passed Options.HostReader, so the local-API server's host was nil in production — the v0.56.0 durableIDForMount raw fallback (and the role gate's host classification) silently no-op'd. Now wired to storage.NewProcHostReader(). This is what makes the v0.56.0 + v0.57.0 raw-mount resolutions actually fire live.
• go build/vet/test ./... clean. With v0.56.0 (guest-bind now RECORDED for raw drives) this closes the reboot/reconnect guest-bind durability gap for raw drives end-to-end.

v0.56.0 — record intent/guest-bind for a RAW enrolled drive (durableIDForMount fallback) (2026-07-01)

Surfaced by the first live raw enrollment (Impl-2b): a raw drive is not a PVE storage, so durableIDForMount (Observe-based) returned "" for it → the enroll's intent + guest-bind recording logged "durable-id unresolved" and silently skipped. Result: the drive mounted + bound + usable, but was NOT intent-tracked (so RegistryKnownTargets — which gates on intent ≠ new — didn't health-track it) and its guest-bind wasn't persisted.

• internal/localapi/disks.go durableIDForMount: after the Observe lookup, fall back to resolving the fs-UUID directly from the mount table — the device mounted at where (via HostReader.Mounts) → its by-uuid identity (HostReader.ResolveUUID) → uuid:<fs-uuid> (the SAME scheme Observe derives, so intent keys stay consistent). Fixes intent recording (enroll/eject) AND guest-bind recording for raw drives; the PVE-storage path is unchanged.
• Test TestDurableIDForMount_RawFallback (+ red-proof: Observe-only → ""). go build/vet/test ./... clean.
• (Residual noted here fixed in v0.57.0: ReassertGuestBinds raw-drive guest-bind re-assert.)

v0.55.0 — raw-device discovery + registry-sourced drive tracking (Impl-2a) (2026-07-01)

Agent backend for drive enrollment (SPIKE-drive-enrollment §SQ1/SQ4/SQ5). Makes raw (non-PVE-storage) drives (a) discoverable for enrollment and (b) health-tracked WITHOUT being a PVE storage — so a drive enrolled the new way isn't enrolled-but-untracked (the 3b-fix false-detach class). No mkfs here (Impl-1 owns it); the controller wizard rewiring is Impl-2b.

• GET /disks/candidates (internal/storage/candidates.go + internal/localapi/disks.go): enumerates host whole-disks from /sys/block, runs the Impl-1 unclaimed filter, and returns the free ones with probe info (size/model/FS/data-bearing/durable-id preview), split into initialize (all unclaimed) and attach (the subset carrying a mountable ext4/xfs FS). Fail-safe carries through (a device not provably unclaimed is omitted).
• RegistryKnownTargets (internal/storage/registry_known.go): the watchdog's known-DRIVE set now comes from the intent registry + Felhom .mount units, NOT Observe() (PVE storages). A unit is tracked iff its intent ≠ new (enrolled/ejected/decommissioned; the watchdog's existing IntentReader gate still decides re-mount). main.go swaps the watchdog KnownTargets source. Observe() is KEPT for real PVE storages (local/local-lvm/pbs) — reports + the /disks view.
• handleDisks union: additive + deduped-by-mount-path — appends registry drives Observe doesn't surface (a registry-only drive now appears in the agent-view) without dropping any Observe row (can't regress the current view).
• Existing-drive migration (ReconcileExistingDrives, idempotent, at agent start): records each currently-mounted Felhom-unit drive as enrolled so the registry-sourced Known() tracks it without its legacy PVE dir-storage. Does NOT create/remove PVE storages.
• Tests: RegistryKnownTargets (enrolled tracked / new excluded / ejected tracked) + the red-proof (Observe-based Known() misses a drive with no PVE storage; the registry provider tracks it); migration idempotency; candidates init/attach split. go build/vet/test ./... clean. Watchdog/ HostLiveness/Remounter unchanged (only the source injected).

v0.54.0 — format-safety foundation: unclaimed-disk guard + guarded-mkfs wrapper (2026-07-01)

Impl-1 (SPIKE-drive-enrollment-2026-07-01). Hardens the destructive Format/mkfs path BEFORE the enrollment feature: today Format delegates authorization to its caller and only checks DataBearing (has-data), which is insufficient — the OS disk is data-bearing yet catastrophic — and the sudoers permits mkfs /dev/*. Two independent, layered guards:

• Part A — mandatory unclaimed-disk guard inside Format (the primary safety). New internal/storage/claim.go: classifyClaim (pure) + gatherClaimFacts refuse to format any device not provably UNCLAIMED — reusing SystemDisks (OS disk) + lsblk FSTYPE (LVM2_member/zfs_member/ linux_raid_member/crypto_LUKS/swap) + foreign mounts + read-only + authoritative pvs/zpool. A Felhom-owned mount under /mnt/felhom-drives is NOT a foreign claim (re-init stays allowed; the DataBearing wipe-confirm still gates data loss). FAIL-SAFE: any read error / undeterminable topology → CLAIMED → refuse. The guard is in Format (lowest layer), not the handler, so no caller can bypass it. Read-only sudoers additions: pvs, zpool status (in FELHOM_DISK).
• Part B — guarded-mkfs wrapper below the agent. configs/felhom-mkfs-guarded.sh (root, 0755) is now the ONLY mkfs path the sudoers allows (FELHOM_FORMAT no longer allowlists raw mkfs.*). It re-checks the cheap catastrophic cases (system disk / LVM PV / foreign mount) and refuses — so even an agent bug/compromise can't mkfs the OS disk. Format execs the wrapper (<device> <fstype>) via Binaries.MkfsGuarded.
• Tests: claim_test.go — table-driven classifyClaim (every claim signal + fail-safe + the two allow cases) incl. the red-proof (a claimed, non-data-bearing OS disk: removing the isSystem check flips it to allowed → test fails, proving the guard adds safety beyond DataBearing); Format-guard integration tests (refuses system disk / LVM member, allows unclaimed → wrapper invoked); capability manifest updated (mkfs sample → the wrapper). go build/vet/test ./... clean.
• Deferred to Impl-3: a raw disk passed through to ANOTHER VM looks unused to the host — a host-level filter can't detect it; the operator gate (shared-box mode) closes that. Impl-1 closes everything host-visible (a strict improvement over today's no-guard state).

v0.53.0 — restore guests INTO the felhom pool (pool-scoped-ACL enabler) (2026-07-01)

Colleague-safety batch #4 phase b (agent half). Enables the agent token to be scoped from / to /pool/felhom + /storage/<targets> (real blast-radius containment on a shared host) by making every restore allocate the guest INTO the pool — the only way a fresh vmid authorizes under a pool-scoped token. Grounded by felhom.eu/documentation/audits/SPIKE-pool-scoped-acl-2026-07-01.md (PASS).

• internal/proxmox/mutate.go: RestoreLXCOptions gains Pool string; RestoreLXC sends pool=<p> only when non-empty (pct restore --pool). Omit-when-empty (a broad-token restore needs no pool) — unit-tested + red-proofed.
• internal/reconcile: new const DefaultPool = "felhom" (single source of truth); BringUpSpec gains Pool, threaded to the bring-up restore. Both restore sites now pool the guest: the provision/DR bring-up (Pool: spec.Pool, set to DefaultPool by the CLI) AND the restore-test scratch guest (Pool: DefaultPool) — the latter closes SPIKE residual #2 (a pool-scoped token would otherwise 403 on the out-of-pool scratch guest).
• cmd/felhom-agent/main.go: both BringUpSpec literals (bring-up/DR + provision) set Pool: reconcile.DefaultPool.
• No ACL/priv change in the agent — that ships in the host-install script (v1.6.0). The pool param is INERT until the token is granted Pool.Allocate at /pool/felhom and the pool exists; publishing is therefore safe ahead of the coordinated ACL swap.
• New tests: proxmox.TestRestoreLXC_PoolParam (set → pool=felhom; empty → omitted), reconcile.TestRestoreSitesUsePool (both restore sites carry DefaultPool). Both red-proofed (unconditional Set → omit test fails; drop either site's Pool → both-sites test fails). go build/vet/test ./... clean.

v0.52.0 — operator-opt-in CPU/RAM cap for the provisioned guest (-cores / -memory) (2026-07-01)

Colleague-safety batch #3. So a trial appliance guest on a colleague's SHARED production Proxmox does not pressure his existing guests, the operator can now cap the guest's CPU cores + RAM at provision time, before the guest's first boot (the peak container-pull moment). Pure CLI→spec plumbing — the reconcile engine already applied the cap; this only wires the flags to it.

• cmd/felhom-agent/main.go: new -cores N / -memory M (MiB) flags for --selftest=bring-up|provision (0 = keep the golden's baked size). They flow through bringUpSizing (now carries Cores/MemoryMB) into the reconcile.BringUpSpec{Cores,MemoryMB} built by BOTH runSelftestBringUp and runSelftestProvision. The -selftest usage string documents them.
• No engine change. internal/reconcile/bringup.go already carries BringUpSpec.Cores/MemoryMB (0 = leave as restored) and buildBringUpConfig already emits cores/memory into the SAME coalesced config PUT as the identity reset — which runs BEFORE e.api.Start, so the cap lands pre-boot. Rejected the pct set-post-provision alternative (runs after boot = an uncapped window; bypasses the token/audit; second config source of truth).
• Omit-when-zero guarantee: an unset cap (0) emits NEITHER cores NOR memory, so an uncapped provision keeps the golden defaults (no regression for the normal single-purpose box) and can never shrink the guest to 0 cores. New pure-function test TestBuildBringUpConfig_ResourceCaps asserts both the set (cores=2,memory=4096) and the absent-when-unset cases; a red-proof (unconditional emit) was run and confirmed to fail the omit assertion, then reverted.
• Deploy dependency: a FRESH host-install --cores/--memory (felhom.eu script v1.4.0) requires the hub artifact manifest to serve agent ≥ v0.52.0, else the old agent rejects the unknown flag. The flags are opt-in, so nobody hits this until they intentionally cap.
• go build / go vet / go test ./... clean.

v0.51.0 — local vzdump retention default (--prune-backups keep-last=3) (2026-06-30)

The PREVENTIVE counterpart to the hub's host_disk + storage_fill detectors: the agent's periodic local whole-guest vzdump now prunes its own old archives, so a box can't refill its own root via its own backups (the felhom-pve incident's root cause — that vzdump carried no retention, ~18 dumps piled under /var/lib/vz/dump).

• internal/proxmox/mutate.go: VzdumpOptions.PruneBackups → passed as PVE's --prune-backups on the vzdump POST (vmid+storage scoped, so PVE prunes only THIS guest's archives on THIS storage).
• internal/backup/runner.go: NewBackupRunner gains a retention arg; the backup applies it via localPruneSpec ONLY when the target is a non-PBS storage (resolved via ListStorage) — PBS offsite retention is a separate lifecycle and is never pruned by the per-run flag. Fail-safe: if the target type can't be confirmed (lookup error / not found) the run SKIPS pruning rather than risk pruning PBS (the detectors remain the safety net). Only the periodic local-API runner sets retention; the restore-test / selftest runners pass "".
• internal/config/config.go: backup.local_backup_retention (keep-last N) with KeepLast() clamped to ≥1 (0/unset/negative → default 3) — a mis-config can NEVER prune the just-made backup —
  • PruneBackupsSpec() → keep-last=N. Wired into the local-API backup runner (main.go).
• Seeding: felhom.eu scripts/felhom-host-install.sh seeds local_backup_retention: 3 in the agent config; the code default also protects any box where it is unset (KeepLast → 3) from day 0.
• F2-b stale-vzdump-lock recovery untouched.
• Tests: the local vzdump carries --prune-backups keep-last=3 (+ companion: no-retention runner emits no prune); PBS is never pruned (+ companion: same retention on a local target IS applied); fail-safe-on-unknown-target; the keep-last≥1 clamp companion. go build/vet/test ./... green.

v0.50.0 — NAS network storage Part A1: NFS/SMB automount foundation (2026-06-30)

Agent foundation of the validated SPIKE-nas-storage-2026-06-29.md (verdict READY): a customer NAS can serve bulk media to a media app. The agent mounts a NAS share host-side under /mnt/felhom-drives/<name> via a systemd .automount (+ .mount) pair; it propagates into guest 9201 for free through the existing shared mp8 bind (no new mountpoint, no restart). A NAS is a distinct storage class — it carries no durable-id and never enters the drive enroll/eject/decommission/wipe/SMART/ watchdog machinery. Bulk-media class only; STOP before A2 (controller registry/UI) + B (restic-SFTP).

• internal/storage/netmount.go (NEW). NetworkMountSpec + the locked SPIKE recipe:
  • NFS (preferred): What=server:/export, Type=nfs4, Options=vers=4.1,soft,timeo=50,retrans=2,noatime,_netdev. soft is the failure-isolation knob (clean EIO, never a df/guest wedge); a default hard mount is never emitted. The +100000 uid mapping is the export's job (anonuid=101000), so the client mount carries no uid.
  • SMB (fallback): What=//server/share, Type=cifs, Options=vers=3.0,credentials=<0600 file>,uid=<+100000>,gid=<+100000>,forceuid,forcegid,file_mode=0664,dir_mode=0775,_netdev (plain octal modes, never setgid 2775). The +100000 rule (container uid/gid N = host N+100000): a container uid 1000 renders uid=101000 so the guest sees its native id and reads+writes; a naïve +0 lands as nobody:nogroup (not writable) — the documented trap, asserted by a companion test.
  • .automount with TimeoutIdleSec (on-demand + idle-unmount): an idle NAS reboot is a non-event.
  • per-share liveness (ListNetworkMounts): TCP-probes the NAS endpoint (2049/445) + reads /proc/mounts — it never stats the (possibly EIO/D-state) mountpoint, so a black-holed NAS cannot wedge a list. Health ok | idle | unreachable, scoped to the affected share, never box-wide.
  • role gate NetworkMountRole: network storage is bulk-userdata only — confined to the /mnt/felhom-drives namespace; any other target is refused (most-protected).
  • Full validation (ValidateNetworkMountSpec) before any unit is rendered: share name (safe segment), server, NFS export (absolute, no traversal) / SMB share name, uid/gid range, creds path.
• Drive-machinery bypass (Scenario D). parseFelhomMountUnit (the host-reboot drive re-assert's classifier) explicitly refuses any unit carrying the network marker, so a NAS mount is never given a durable-id, SMART-probed, or re-asserted as a drive. Companion red-proof: the same by-uuid-shaped unit with the drive marker DOES parse — the guard is the discriminator, not luck.
• internal/localapi/netstorage.go (NEW). Self-scoped endpoints POST /netstorage/add, GET /netstorage, POST /netstorage/remove. SMB credentials are written out-of-band to a 0600 file the agent owns (never in git, never in a plaintext registry, never logged). Role-gated to the user-data namespace.
• sudoers: new narrow FELHOM_NETMOUNT alias (install/enable/disable/stop the .automount + remove the felhom mount-unit files; the .mount half reuses FELHOM_MOUNT, the mountpoint mkdir reuses FELHOM_INTERMEDIARY). visudo -cf clean.
• config: privileged.smb_creds_dir (default /var/lib/felhom-agent/smb-creds).
• Runtime deps: mount.nfs (nfs-common) + mount.cifs (cifs-utils) present on the host (confirmed live).
• Tests: exact NFS/SMB option-set string-asserts + the +100000 companion; validation matrix; role gate; unit round-trip + health; the drive-machinery guard + companion; Ensure/Remove command sequences.

v0.49.0 — reboot-during-backup stale-lock recovery (F2-b) + shared-parent script redeploy fix (F2-a) (2026-06-30)

Closes the two host-reboot findings from TESTRUN-fullstack-2026-06-29.md.

• F2-b — startup stale-lock recovery (internal/localapi/stalelock.go, NEW). A host reboot DURING a vzdump backup leaves the guest with a snapshot-delete/backup lock + a dangling vzdump snapshot; onboot:1 then can't start the locked CT → the customer box stays DOWN until a human runs pct unlock. The agent now self-heals at startup (Server.RecoverStaleLockedGuests, called alongside ReassertGuestBinds/RecoverFormatJob): for each guest carrying a backup lock, only when no vzdump is genuinely in-flight (the load-bearing invariant — at startup the agent's own backup loop hasn't run, so the lock is stale; the guard fails SAFE if it can't confirm), it pct unlocks → deletes the dangling vzdump snapshot (API + WaitTask) → starts the CT iff onboot and not already running. Scope is strictly the two vzdump locks; migrate/disk/create/… are left untouched. Idempotent.

  • internal/proxmox: new reads GuestConfig.Lock()/OnBoot(), Client.ListSnapshots, Client.ListRunningTasks, and the Snapshot type. Reads + snapshot-delete + start go through the API token; only pct unlock shells out (no API equivalent).
  • sudoers + capability manifest: new narrow grant FELHOM_STALELOCK = /usr/sbin/pct unlock [0-9]* and Critical capability stalelock-unlock (a stuck-locked guest = customer box down). visudo -cf clean; covered by the manifest↔sudoers build gate.
  • Tests: recovery sequence + companions — no-lock touches nothing; non-backup lock left alone; onboot=0 unlocked-but-not-started; delsnapshot only when a snapshot exists; invariant guard (live backup → not cleared; unconfirmable → fail-safe); already-running → not restarted.

• F2-a — shared-parent boot script never redeployed (internal/localapi/intermediary.go). The host's /mnt/felhom-drives was still in root's shared:1 peer group (so every drive bind DOUBLED) because the live boot script predated the v0.36.6 make-private fix. Root cause: EnsureSharedParent gated the (re)install on the unit file only, so a script-only change never deployed. Fixed: the new sharedParentInstallStale helper compares both the script and the unit (missing or differing → reinstall). Boot-time-only — it rewrites the on-disk script; it does NOT churn the live mount (the live bind/make-private/make-shared stays guarded on !isHostMountpoint). Verified empirically on the host: the correct bind → make-private → make-shared sequence gives the parent its own group + no doubling.

  • Tests: a stale-script/current-unit case triggers reinstall (the F2-a regression); both-current is a no-op; missing files are stale; a content guard asserts the shipped script keeps make-private.

• Live-caught fixes (same version, found during felhom-pve validation): PVE 9.x rejects GET /nodes/{node}/tasks?running=1 (HTTP 400 "property not defined in schema") — the invariant guard now uses ?source=active. And the unprivileged-LXC start emits a benign WARNINGS: 1 (systemd-nesting) advisory that false-failed the recovery's start — Start now uses AllowWarnings (matching the restore-test's start step).

• §D supervised reboot — both findings live-validated. F2-a: after reboot /mnt/felhom-drives came up as its OWN peer group (shared:94, not shared:1) with no doubling; guest sees both drives, apps healthy. F2-b: a reboot with the exact stale state (induced snapshot-delete lock + a real dangling vzdump snapshot) reproduced the stuck symptom (pve-guests "CT is locked (snapshot-delete)" → start failed) and the agent auto-recovered — unlock → removed the real dangling snapshot → started the CT. Zero spurious operator pages on the reboots. See felhom.eu/documentation/audits/TESTRUN-fullstack-2026-06-29.md.

• Version 0.48.0 → 0.49.0.

v0.48.0 — report the served local-API leaf fingerprint (hub-side re-key detection, Part A) (2026-06-29)

The agent now rides its served leaf fingerprint on every host report so the hub can detect an agent re-key fleet-wide (the last self-health leg — host_leaf_changed, hub v0.22.0).

• internal/hub/report.go: new HostReport.LeafFingerprint string (leaf_fingerprint) — the SHA-256 of the leaf the agent currently serves. Empty when the local API is disabled (no leaf) → the hub treats "" as unknown, never an alert. Not a secret.
• internal/hub/collect.go + cmd/felhom-agent/main.go: Collector.SetLeafFingerprint(fp) threads the fp from EnsureLeaf (the SAME value the loud LOADED/REGENERATED log reports) into every report, next to Capabilities.
• Tests: the report includes the fp when set, "" when unset (local API disabled); golden + contract + field-names tests updated (cross-repo golden mirrors leaf_fingerprint). Version 0.47.0 → 0.48.0.

v0.47.0 — controller-swap verify hardening: reject a crash-looping no-healthcheck image (F1) (2026-06-29)

Closes F1 from the no-mercy testrun: a controller image with no HEALTHCHECK that crash-loops could land a single "Running" inspect poll → the swap marked it healthy → no rollback (alpine tagged as the controller passed in ~4 s, then Restarting (0)). The real controller image has a healthcheck so the live severity is low, but the rollback safety net had a hole.

• internal/localapi/controllerswap.go: controllerHealthy now also reads {{.RestartCount}} (a 4th docker inspect -f field) — running && RestartCount>0 → not-ok (a process that has already crash-restarted isn't stably up, regardless of healthcheck). It also signals needsDwell for the no-healthcheck (none) case. verify adds a stability dwell: a no-healthcheck image must report ok on verifyDwell (=3) consecutive polls before it's accepted; a real healthy result is trusted immediately (Docker already gated it). Any not-ok resets the dwell. Timeout → existing rollback path runs. No change to writeImage, the sudoers grants (the * in docker inspect -f * spans the extended template — confirmed live), or the state-file/rollback orchestration.
• Tests: F1 red-proof (RestartCount>0 → verify false; companion: rc=0+dwell=1 verifies → the rc check is what blocks it); the dwell (single ok then crash → verify false; companion dwell=1 accepts it); a real healthy image verifies promptly (no false rollback). Existing RollbackOnUnhealthy / HealthyWithNoHealthcheck stay green. Version 0.46.0 → 0.47.0.

v0.46.0 — leaf lifecycle: signal + loud-log a regenerated leaf (prevention, Part B.1) (2026-06-29)

Makes an accidental local-API leaf regeneration (the 2026-06-28 root→non-root migration class — moving /var/lib/felhom-agent aside silently minted a new leaf → every controller's pin invalidated for days) visible immediately instead of silent.

• EnsureLeaf now returns generated bool (internal/localapi/cert.go): false = an existing pair was LOADED (stable fingerprint), true = a fresh leaf was GENERATED.
• Loud call-site (cmd/felhom-agent/main.go): a load logs INFO local-api leaf LOADED; a regeneration logs WARN local-api leaf REGENERATED — any previously issued bootstrap pins are now INVALID; controllers will fail the pin check until re-bootstrapped (with the new fingerprint).
• No new sudo/capability surface — pure return + log change. The companion install-script preservation (--preserve-state-from + the populated-host guard) lives in felhom.eu/scripts/felhom-host-install.sh.
• Tests: EnsureLeaf first call generated==true, second generated==false AND same fingerprint (persistence keeps the pin stable). Version 0.45.0 → 0.46.0.

Changelog

All notable changes to felhom-agent are recorded here. Update on every code change that gets pushed.

v0.45.0 — controller-swap under non-root: stdin tee write + narrow sudoers grants (Option A) (2026-06-29)

Restores fleet controller-swap / managed auto-update under the non-root agent — the one capability the 2026-06-29 sudoers audit deliberately left broken because the old write vector needed arbitrary in-guest execution. Mechanics spike-proven (felhom.eu/documentation/audits/SPIKE-controllerswap-narrow-grants-2026-06-29.md, GO). No controller change — the swap endpoint contract is unchanged; only the agent's internal write mechanism + the allowlist.

• writeImage no longer shells out. Was GuestExec("bash","-c","printf '%s\n' '<img>' > <file>") (the swap's only interpolated/shell vector). Now GuestExecStdin(strings.NewReader(img+"\n"), "tee", "/etc/felhom-controller-image") — the image ref is piped on stdin into an in-guest tee; no shell, no interpolation. The trailing \n keeps the on-disk bytes byte-identical to the golden's printf '%s\n', and the bootstrap reads IMAGE=$(cat …) (newline-stripping), so the write is consumed identically. ValidControllerImage still gates upstream.
• New stdin seam (no fenced-runner bypass): proxmox.Runner.RunStdin / ExecRunner.RunStdin (Run with cmd.Stdin), GuestBinder.GuestExecStdin, and GuestExecutor.GuestExecStdin — the swap routes stdin through the SAME sudo -n fenced runner as every other privileged op.
• FELHOM_CONTROLLERSWAP sudoers alias (5 narrow, auditable grants): cat <fixed file>, docker image inspect *, docker inspect -f *, systemctl restart <fixed unit>, tee <FIXED image file>. No general pct exec, no bash -c — the spike's negative controls (arbitrary exec, tee to any other path, docker rm, rm -rf) stay denied. The 5 are added to the v0.44.0 capability manifest (Critical — a silently-broken fleet auto-update is operator-alert-worthy), so the self-probe watches them and the build-test asserts grant↔code coverage (companion red-proof: dropping the tee grant fails the gate — demonstrated red→green on the real file).
• Existing swap tests (happy / rollback-on-unhealthy / image-absent / no-healthcheck / bad-image / single-flight) pass over the new write path; a new test asserts the write is stdin-tee with exact image\n and no shell vector. Version 0.44.0 → 0.45.0.

v0.44.0 — privileged-capability self-probe (build-time manifest test + runtime probe + hub snapshot) (2026-06-29)

The agent now self-checks the sudo -n grants it depends on, so a missing allowlist entry (the 2026-06-28 cutover class: lxc-info/make-private/…) is caught LOUD — in CI at build time and on the host at runtime — instead of surfacing days later as user-visible breakage. First slice of agent self-health; the controller↔agent channel check is a separate later task.

• internal/capability (NEW): a Manifest() of the required (binary, representative-arg) vectors (seeded from the 2026-06-29 audit — the OK + CLOSED rows; the SURFACED/DEFERRED rows pct exec */pct create/mount UUID/sensors are deliberately excluded). Prober.Probe lists each against the live policy with sudo -n -l -- <binary> <args> (a policy LIST — never executes, safe for mkfs/pct entries) via a DIRECT runner, plus an os.Stat existence check, mapping to ok / degraded ("sudo policy denied" | "binary not found"). A total sudo failure (drop-in missing) collapses to ONE aggregate signal. Serve-degraded: the probe never blocks startup, panics, or errors.
• Build-time gate (manifest_test.go): parses configs/felhom-agent.sudoers, translates each glob to a regex, and asserts every manifest vector is covered by a grant — exactly what would have caught the dropped lxc-info/make-private lines in CI. Includes a red-proof: with the lxc-info line removed from an in-memory copy, the check FAILS for guest-init-pid (and passes on the real file) — proving the gate is not hollow.
• Runtime wiring: Probe runs once at startup (INFO capabilities self-check N/N ok, plus an ERROR per degraded capability naming the gated feature) and on every hub-report cycle; the snapshot rides the report as the new non-nil HostReport.Capabilities []capability.Status (golden + contract test updated; cross-repo hub copy mirrors it).
• No allowlist change; the live host is post-audit complete, so the probe reports N/N ok — itself a live proof the probe agrees with the fixed sudoers. Version 0.43.0 → 0.44.0.

(sudoers completeness audit, folded into v0.44.0) — close non-root allowlist gaps (2026-06-29)

A full audit of every privileged command the agent shells via sudo -n against configs/felhom-agent.sudoers, closing the read-only/fixed-vector gaps left by the 2026-06-28 root→non-root cutover. Sudoers-only change — no Go change, no version bump (the file is fetched canonically by the host-install script). Root cause of the multi-drive "attach one, the other drops" symptom (audit felhom.eu/documentation/audits/SPIKE-multidrive-mutual-exclusion-2026-06-29.md): the allowlist was incomplete, so several sudo -n calls were denied under the non-root user.

• lxc-info -n [0-9]* -p -H → FELHOM_INTERMEDIARY (THE root-cause fix). guestInitPID (intermediary.go:256) shells this to resolve the guest init PID for GuestSeesMount→bound_under_parent. It was absent from the allowlist → sudo -n denied → empty PID → every external drive reported absent → the controller drive-gate stopped each drive's apps (flapping). With the grant, bound_under_parent reports truthfully and the gate quiesces.
• mount --make-private /mnt/felhom-drives → FELHOM_INTERMEDIARY. EnsureSharedParent (intermediary.go:110) calls it to isolate the shared parent's peer group on first setup; the allowlist had only --make-shared, so the parent stayed in root's peer group and host submounts "doubled". Guarded by a mountpoint check (never re-churns a live parent).
• systemctl restart dnsmasq → FELHOM_DNSMASQ. The v0.29.x LAN-DNS fix switched reload→restart (lanresolver.go restartDnsmasq) but the allowlist still only permitted reload → split-horizon DNS self-heal was silently denied under non-root. Added alongside the retained reload.
• pct set [0-9]* -onboot 1 → FELHOM_PROVISION. The provision back-half (backhalf.go, F3 auto-start) sets onboot; only -mp[0-9]* was allowed → denied under non-root.
• pct reboot [0-9]* → FELHOM_GUESTHOOK. RebootGuest (disks.go:448, the enroll "activate pending binds" fallback) was unmatched.

Surfaced for operator decision (NOT added — would require arbitrary root-in-guest): GuestExec's general pct exec [0-9]* -- <…> (controller-swap self-update / Phase-2 managed updates) runs variable vectors incl. bash -c "<interpolated>" — granting it = arbitrary execution. Controller-swap is currently broken under the non-root agent until narrow per-vector grants are decided. Deferred: sensors -j (defined-but-unwired AND lm-sensors not installed on the host — no live caller, path unverifiable). Not added (no daemon caller): pct create … (CreateGoldenLXC, maintenance/broad), mount UUID=… … (MountUSBByUUID, legacy/unreferenced). Full audit table in REPORT.md.

v0.43.0 — canonical systemd unit + binary published to Gitea (BUNDLE slice) (2026-06-28)

Day-0 no longer needs a hand-installed agent. The agent binary is now PUBLISHED to Gitea as a generic package and the host-bootstrap script fetches → verifies (sha256 vs the hub-vouched manifest) → installs it. This commit adds the canonical systemd unit (was hand-made per host) and the publish tooling; the binary itself is a version-only rebuild (no behavioural change).

• configs/felhom-agent.service (NEW, canonical): User=felhom-agent/Group=felhom-agent (the documented non-root production model — README "Process model"; privileged.mode: "sudo" + the narrow sudoers allowlist), ExecStart=/usr/local/bin/felhom-agent --config /etc/felhom-agent/agent.json, After=network-online.target pve-cluster.service pveproxy.service, Restart=on-failure, StateDirectory=felhom-agent. Deliberately NO sandboxing, with the reasons documented inline:
  • NoNewPrivileges is NOT set — it would block the setuid sudo the agent needs for every host-root op (mount/format/pct/dnsmasq), silently killing all privileged capability.
  • NO mount-namespacing hardening (ProtectHome/ProtectSystem/PrivateTmp/…) — any of those give the unit a PRIVATE mount namespace, and the intermediary-mount drive model relies on mount --make-shared/--bind propagating into the running guest; in a private namespace every drive enrollment would silently break. The agent shares the host mount namespace; the sudoers allowlist is the security boundary.
• scripts/publish-agent.sh (NEW): builds (optional) + PUTs the binary to /api/packages/admin/generic/felhom-agent/<ver>/felhom-agent (Gitea generic), prints AGENT_VERSION + AGENT_SHA256, and does a GET round-trip (re-fetch + sha256 re-check) to prove the artifact is fetchable + intact. Pinned to a version (never :latest); idempotent (delete-then-PUT); asserts the binary's --version matches the publish version. Creds via GITEA_USER/GITEA_TOKEN (falls back to REGISTRY_USER/REGISTRY_TOKEN).
• configs/build-golden.sh: after the vzdump archive is produced, computes its sha256 and PUTs it to /api/packages/admin/generic/felhom-golden/<golden-version>/golden.tar.zst (<golden-version> = the baked controller version), printing GOLDEN_VERSION + GOLDEN_SHA256. Opt-in (only when the Gitea creds are set); the local-golden auto-discovery stays as a fallback.
• configs/felhom-agent.sudoers (latent bug fix): escaped the commas in the lvs -o lv_name\,data_percent\,metadata_percent and lsblk -o NAME\,FSTYPE\,PTTYPE\,MOUNTPOINT argument lists. Sudoers treats a bare comma as a command separator, so visudo -cf REJECTED the file — it had never been visudo-validated live because the demo host ran the agent as root+direct (sudoers unused). The escaped commas still match the agent's real comma-bearing args. Surfaced by the BUNDLE live install (the host-install script visudo -cf-validates before installing).
• cmd/felhom-agent/main.go: version 0.42.0 → 0.43.0.
• The operator records the printed agent + golden version+sha256 in the hub (Configs → "Day-0 artifacts"); the host-bootstrap script verifies fetched artifacts against those before installing.
• go build/vet/test ./... green.

build-golden.sh — default controller image bumped to current; golden rebuilt at 0.85.1 (2026-06-27)

Operational + a default fix (no agent binary change — version stays v0.42.0).

• configs/build-golden.sh: the CONTROLLER_IMAGE default (positional arg 6) was a stale …/felhom-controller:0.43.0 — an argument-less golden build baked a wildly old controller, so fresh Day-0 boxes started old (the demo started at 0.77). Bumped the default to the current …/felhom-controller:0.85.1 so the worst case (no explicit arg) is merely "current", not ancient.
  • Always pass the controller version explicitly at each rebuild — this default only bounds the worst case. A future make golden that resolves the latest pullable tag would remove the need for a hand-bumped default (Observation, not this task).
• Golden rebuilt at 0.85.1 on felhom-pve with the image passed explicitly (build-golden.sh 9100 … gitea.dooplex.hu/admin/felhom-controller:0.85.1). New archive volid: local:backup/vzdump-lxc-9100-2026_06_27-11_42_51.tar.zst (rootfs 32G + Docker-data 16G + user-data 8G, all in the archive; mp0+mp1 inclusion confirmed in the vzdump log).
  • Baked-image verify (cheap, mandatory): in the build guest /etc/felhom-controller-image = …:0.85.1 and docker images showed it baked (379 MB). New Day-0 provisions now ship current.
  • The host-bootstrap script auto-discovers the newest golden, so it picks up this rebuild automatically. The real demo 9201 was not re-provisioned (it is the Phase-2 floor test box).

v0.42.0 — agentic controller update: in-guest image swap + rollback (Phase 1) (2026-06-26)

The host agent now owns the in-guest controller image swap — the new-architecture replacement for the controller's dead in-container docker compose self-update. The controller pre-pulls the target image (shared docker socket, its own registry token) then asks the agent to swap; the agent — external to the controller container, so it survives the controller being killed mid-swap — does the rest and rolls back if the new controller doesn't come up healthy.

• New local-API routes (internal/localapi/controllerswap.go, token-scoped via withGuest):
  • POST /controller/swap {image} → 202 {status:"swapping", previous_image, target_image}, then async: record previous (crash-safety state file /var/lib/felhom-agent/controller-swap-<vmid>.json) → confirm the target image is present in the guest (else abort, no swap) → write /etc/felhom-controller-image → systemctl restart felhom-controller-bootstrap.service → poll the new controller to healthy (docker inspect, ≤90s) → roll back to the previous image + restart if it doesn't (the guest is never left without a controller). Single-flight per guest (409 if busy). Image ref is strict-validated (gitea.dooplex.hu/admin/felhom-controller:<semver>) before any action.
  • GET /controller/swap/status → {state: swapping|done|failed, current, previous, target, error}.
• GuestBinder.GuestExec (internal/localapi/guestbind.go): the one pct exec seam the swap composes over (cat/inspect/write/restart), reusing the fenced root runner.
• --selftest=controller-swap -vmid -image <ref>: exercise the primitive directly (the target image must already be pulled in the guest).
• Wired ControllerSwap: guestBinder into the local-API server (cmd/felhom-agent/main.go).
• Tests (controllerswap_test.go): happy swap, rollback-on-unhealthy (+ companion red-proof: dropping the rollback leaves the guest on the bad image and fails the test), image-absent no-swap, no-healthcheck-running, bad-image 400, single-flight 409.

v0.41.0 — provisioned customer guests auto-start after a host reboot (onboot:1) (2026-06-24)

F3 fix. The provision back-half now sets onboot:1 on the customer guest, so after a host reboot/power-cut the customer's whole home-server (controller + apps) comes back on its own — previously every provisioned guest inherited the golden's --onboot 0 and stayed stopped until a manual pct start (confirmed live in the stable-path/sys-drive restart campaign, Phase 4.1). The new step is a fatal pct set <vmid> -onboot 1 placed right after the config-mount attach (backhalf.go), mirroring the config-mount/parent-bind pct set ops. No startup/boot-order/delay — the v0.75 mountpoint-gate already covers the drive-bind race at boot (Phase 4.4), so the controller won't write app data onto the rootfs while the agent re-binds drives.

The golden stays onboot:0 (build-golden.sh unchanged): a template must not auto-start, and onboot is a per-guest property the back-half is the right place to set. Unit-tested (TestProvision_SetsOnbootOne asserts the exact pct set … -onboot 1 invocation, with a red-proof against removing the call). The pre-existing demo guest 9201 (provisioned pre-fix) was remediated non-destructively with pct set 9201 -onboot 1. Capstone live-validated (2026-06-24): destroyed + re-provisioned 9201 through the real provision chain with v0.41.0 → fresh pct config showed onboot: 1 with no manual set; a subsequent felhom-pve host reboot brought 9201 back running with no manual pct start (the onboot:0 scratch guests correctly stayed stopped), controller + base infra healthy, drives re-bound at stable, sys_drive separate — the exact Phase-4.1 failure now passes.

v0.40.0 — third CT volume: SSD user-data (/mnt/sys_drive, mp1) baked + -sysdata-grow (2026-06-23)

The third golden volume. Extends the OS/Docker-data split (v0.29.x) to a three-volume layout: rootfs + Docker-data (mp0) + SSD user-data (mp1 @ /mnt/sys_drive, backup=1) — the controller's system_data_path. Until now /mnt/sys_drive was a plain directory on the 32 GB OS rootfs, so the controller correctly warned that SSD app data (<sys_drive>/felhom-data) lands on the OS drive. Baking it as its own thin volume clears that warning with zero controller change (the controller already auto-discovers <sys_drive>/felhom-data and warns via system.IsMountPoint); the mp under the guest's /mnt reaches the controller container through the existing -v /mnt:/mnt:rslave bind.

• configs/build-golden.sh — pct create gains --mp1 ${ROOTFS_STORAGE}:${GOLDEN_SYSDATA_GB},mp=/mnt/sys_drive,backup=1 (new env GOLDEN_SYSDATA_GB=8, near-empty; provision grows it). The resilience guards are mirrored for mp1: a findmnt /mnt/sys_drive separate-mount assertion, and the vzdump-inclusion guard now aborts if either mp0 or mp1 is EXCLUDED (the B3 trap — extra mountpoints default backup=0). The golden does NOT pre-create felhom-data; the controller does once it's a real mountpoint.
• internal/reconcile/bringup.go — const DefaultSysDataMount = "mp1"; BringUpSpec gains SysDataGrowGB int + SysDataMount string; a new "4c" grow block (online, grow-only ResizeLXC, its own task) mirrors the "4b" Docker-data grow. 0 = skip (separateness comes from the golden, not the grow — the warning clears regardless of size).
• cmd/felhom-agent/main.go — -sysdata-grow / -sysdata-mount flags (mirror -datavol-grow/-datavol-mount); bringUpSizing carries them into all three bring-up/provision call sites; --selftest=provision help text updated.
• Static volume, NOT an enrolled drive. /mnt/sys_drive is part of the baked golden layout; it never enrolls/ejects/decommissions and is deliberately kept off the drive-intent machinery. freeMountSlot auto-skips the baked mp0/mp1 so enrolled drives never collide.
• Tests: TestRunBringUp_StorageSplit_SysDataGrow (asserts ResizeLXC(vmid,"mp1","+42G")) + …_SysDataGrowZeroNoResize (0 → no mp1 resize). RUNBOOK-provisioning-storage.md extended to the three-volume layout (default ~512 GB SSD: 32 rootfs + 200 docker-data + 50 user-data).

v0.39.0 — DR recipe completion: live PBS coord + drop the two unfillable drive fields (2026-06-16)

DR-recipe agent-half completion. A live eyeball of the demo recipe (v0.38.0) found three host-half problems; all three are resolved here. No behavior change outside the recipe path.

• PBS coord now resolved LIVE each collect. New internal/pbs/live_reporter.go — LiveSnapshotReporter implements hub.PBSReporter by doing the cheap Client.Snapshots() list itself, with last-known-good fallback, instead of reading only the verify-loop's SnapshotStore. Previously the recipe's pbs block was omitted whenever the store was empty — which a one-shot collect (--selftest=hub) and the first ~6 h window of every daemon after a restart always saw (the verify loop populates the store on its own 6 h cadence). The restore SOURCE must not depend on a maintenance cadence. Per-datastore: a live error/timeout → that datastore's last-known-good; a successful (even empty) response is authoritative and updates the shared store. Targets-resolution failure → the full LKG aggregate. Bounded by DefaultLiveSnapshotTimeout (8 s) so a hung PBS never stalls the heartbeat. List only — it never triggers a Verify. The verify loop keeps Recording into the SAME store (shared last-known-good); both use one hoisted pbsTargets closure.
  • SnapshotStore.Get(datastore) added (per-datastore LKG copy) — the only SnapshotStore change.
  • Wired into the collector in BOTH runDaemon and runSelftestHub (the selftest built its own collector with a nil reporter — that is why the live --selftest=hub showed pbs_snapshots:[]).
  • Intended side effect: report.pbs_snapshots is now live too (fresher hub PBS view).
• drives[].role DROPPED from the v1 host-half shape. A drive's purpose is a hub/operator-owned manifest concept, not cleanly derivable host-side (both demo externals are content=backup, yet one is the primary data drive and the other holds no apps). Deferred until the hub/operator stamps it.
• drives[].restic_repo_coord DROPPED from the v1 host-half shape. It named a backup tier that does not exist — cross-drive backup is rsync to the SAME internal SSD; there is no offsite/second-failure- domain bulk copy. RESERVED for a future tier (see the BACKLOG note in REPORT). v1 drive shape is now {durable_id, mount_path, intent, fs_type?, total_bytes} — identifiers/intent/size only.
• The hub reads drives as json.RawMessage, so dropping fields needs NO hub struct change — only golden + test sync. Cross-repo golden (host-report.golden.json here + the hub's copy) re-pinned and verified byte-identical (sha256 57f2a5e7…18b2f2b5 — manual checksum-diff discipline): the hub copy previously lacked the dr_recipe section entirely; it is now a verbatim copy of the agent golden.
• Tests: new internal/pbs/live_reporter_test.go (T1 coord-present-without-prior-verify [load-bearing] + inline bare-store companion, T2 error→LKG fallback, T3 success-warms-store, T4 targets-error→aggregate, T5 bounded-by-timeout, T6 empty-success-authoritative); TestDRRecipeHostHalf_V1DriveShape (drive object carries neither role nor restic_repo_coord); TestBuildDRRecipeHostHalf / TestHostReport_ContractMatchesGolden updated to the v1 drive shape. Each companion was demonstrated to FAIL on the pre-fix/mutated code, then reverted (see REPORT).

v0.38.0 — DR recipe: emit the secret-free storage/guest/PBS half in the host-report (2026-06-16)

DR recipe slice (agent half). Additive dr_recipe section on the host-report — the agent half of the secret-free reconstruction recipe (SPIKE-dr-recipe-2026-06-16.md) that complements escrow (keys) + PBS/restic (bytes): the non-secret SCAFFOLDING an operator must rebuild before the PBS bytes can land. The hub assembles it with the controller's app half into one customer recipe.

• internal/hub/dr_recipe.go — DRRecipeHostHalf{recipe_version, guests[], pbs, drives[], pve_storage[]} built by the pure BuildDRRecipeHostHalf(guests, targets, pbs) from facts the report ALREADY collects (no new privileged reads): guests[] = each guest's sizing (GuestSpec, skip status-unknown); drives[] = the user-data external drives (usb/local-dir with a uuid: durable-id + mount path) with {durable_id, role, mount_path, intent, total_bytes}; pve_storage[] = every storage target {name, type, content} (the storage.cfg scaffolding); pbs = the latest snapshot's coordinates {repo_id (the pbs storage id), namespace, latest_snapshot_id}. Wired into Collect() after the facts are gathered; HostReport.DRRecipe (always set, never null).
• BOUNDARY (the Phase-1 lesson): every field is an identifier / intent / size / coordinate — NEVER a key, password, token, hash, or ENC: value. The PBS encryption key stays in escrow; the access token in identity-escrow; the restic password in escrow — the recipe names only the repo_id/namespace/ durable_id/restic_repo_coord the restore TARGETS. recipe_version=1; read is ignore-unknown (forward-compat). The wire shape is pinned in the cross-repo golden (host-report.golden.json here + the hub's copy — keep them byte-identical; manual checksum-diff on any change).
• Tests: TestBuildDRRecipeHostHalf (drives = only user-data; pve_storage = all; pbs = latest; guests skip nil-spec), ..._NoPBS (omitted, non-nil slices), TestDRRecipeHostHalf_NoSecrets (the lighter boundary mirror — serialized half carries NO credential-shaped key; the load-bearing version is on the controller emitter), and the dr_recipe key-set added to TestHostReport_ContractMatchesGolden.

v0.37.0 — host-reboot remount re-resolves enrolled drives by filesystem UUID (2026-06-16)

TASK A — close out the reboot story (agent half). On a host reboot the kernel can re-enumerate block devices and move a drive's node (felhom-usb /dev/sdb→/dev/sdc), and a .mount unit left disabled by a prior detach never auto-mounts at boot — so an enrolled drive could stay unmounted (or, with any node-trusting remount, mount the WRONG device). Root cause pinned LIVE: felhom-usb's systemd mount unit was disabled (no multi-user.target.wants symlink) while felhom-flash's was enabled; What= was already correct (by-UUID), but nothing re-asserted the unit at startup.

• storage.ResolveStorageDevice(durableID) — resolves the enrolled uuid:<fs-uuid> storage scheme to its CURRENT backing /dev node by re-scanning /dev/disk/by-uuid (never a cached node); errors if the UUID is genuinely absent so a caller skips a gone drive instead of fail-mounting a stale node.
• storage.parseFelhomMountUnit — pure inverse of renderMountUnit (Name/UUID/Where/Type/Options) keyed on a Managed by felhom-agent marker; ignores any foreign .mount unit.
• (*SudoHostOps).ReassertEnrolledMounts(ctx) — at startup (BEFORE binding into the guest) and on the periodic 20s tick: for each enrolled .mount unit, re-resolve by UUID and re-run EnsureMount (idempotent systemctl enable --now) — re-enables a disabled unit AND mounts the CURRENT device by UUID, so a /dev/sdX reshuffle is a no-op. Skips ONLY the durable steady state (mounted AND enabled), via the pure shouldReassertMount; a mounted-but-DISABLED unit (the exact live felhom-usb bug — it serves now but a reboot would not auto-mount it) is still re-asserted to re-create the wants-symlink. Enabled-state is read with a privilege-free os.Lstat of the multi-user.target.wants symlink (unitEnabled) — no systemctl is-enabled subprocess, no new sudoers entry. An absent UUID is skipped (re-asserts on a later tick).
• Wired in main.go ahead of ReassertGuestBinds so mounts are live before the guest binds re-assert.
• Tests (Linux, seam the device-resolution): TestResolveStorageDevice_ToleratesDeviceLetterMove (UUID symlink moved sdb→sdc → resolves sdc; companion asserts the cached enroll-time node differs from the freshly-resolved one — a node-based remount would target the wrong device), ..._AbsentAndScheme (absent UUID errors; only the uuid: scheme resolvable), TestParseFelhomMountUnit (render→parse round-trip + rejects a foreign unit), TestShouldReassertMount (the four mounted/enabled combos — pins the mounted-but-disabled re-assert), TestUnitEnabled (wants-symlink detection).

TASK A2 — verdict: enrolling a NEW drive does NOT need an LXC restart. The enroll path lands on the live intermediary-mount AttachDrive (/disks/guest-attach → handleDiskGuestAttach → AttachDrive, "no pct, no reboot") under the single shared parent — unbounded named live slots — NOT the legacy RebootGuest branch. The operator's pre-created-slot-pool idea is therefore unnecessary.

v0.36.7 — isolate the shared parent only on CREATE (no peer-group churn) (2026-06-15)

Follow-up to v0.36.6: make-private+make-shared must run ONLY when the self-bind is first created, not on every reconcile — re-doing it churns the peer-group id and ORPHANS the guest`s already-established slave (propagation silently dies, guest sees empty). Guarded on the mountpoint check; on a fresh boot it runs once before pve-guests so the guest slaves the right group.

v0.36.6 — shared parent gets its OWN peer group (make-private first) — ROOT CAUSE of double-bind (2026-06-15)

The shared-parent self-bind INHERITED the root mounts shared peer group (/mnt/felhom-driveswasshared:1same as/), so every drive bind under it propagated back via the root peer and DOUBLED (2 stacked binds per drive — the real cause behind v0.36.3-.5). EnsureSharedParent + the boot script now make-private(detach from the root group) BEFOREmake-shared` (own group whose only slave is the guest), so a drive bind propagates to the guest exactly once.

v0.36.5 — AttachDrive normalizes to exactly one bind (2026-06-15)

AttachDrive now COUNTS the binds at a stable path (countHostMounts) and normalizes to exactly one: it is a no-op only when there is exactly ONE bind the guest sees; otherwise it strips ALL existing binds (bounded loop) and lays down one fresh bind. This converges a stacked double-bind to one — the old umount-one+mount-one force-rebind never did. Caught when a double-bind survived a guest reboot.

v0.36.4 — serialize AttachDrive/DetachDrive (no double-bind race) (2026-06-15)

A mutex on GuestBinder serializes AttachDrive/DetachDrive so a controller-triggered reconnect and the agent`s periodic reconcile can no longer both pass the isHostMountpoint check and double-bind the same stable path (a TOCTOU race observed live as 2 stacked binds during rapid eject/reconnect).

v0.36.3 — DetachDrive loop-umounts stacked binds (2026-06-15)

DetachDrive now umounts ALL stacked binds at a stable path (bounded loop), not just one layer — so an eject/detach fully detaches even if more than one bind accumulated (operator bind on top, or a rare attach race), keeping the fail-close intact. Caught in the E13 rapid eject/reconnect sweep.

v0.36.2 — eject also keeps the raw mounted (reconnectable) (2026-06-15)

Extends v0.36.1 to EJECT: eject now DetachDrive`s the bind under the parent but LEAVES the raw /mnt/ mounted (consistent with decommission), so the H1 disconnect→reconnect roundtrip re-binds cleanly on a non-removable drive. Physical removal is the separate "remove from system" action. Test: eject calls DetachDrive + does NOT unmount the raw.

v0.36.1 — decommission keeps the raw mounted (re-enrollable) (2026-06-15)

Fix caught in the E10 acceptance test: the self-serve decommission unmounted the RAW /mnt/ host mount, which orphaned a non-removable drive (no re-plug) so a one-click re-enroll bound an empty dir. On the intermediary model decommission is now a LOGICAL retire — it DetachDrive`s the bind under the parent (drive invisible to the guest) but LEAVES the raw mounted, so re-enroll re-binds cleanly. Physical removal stays the separate "remove from system" action. Test updated.

v0.36.0 — guest boot-id on /disks (deterministic guest-reboot recreate) (2026-06-15)

The agent now emits guest_boot_id on GET /disks: <host-btime>-<guest-init-starttime> — changes on every guest boot (host reboot OR guest reboot) but is STABLE across a controller-only restart. The controller persists the last-seen value and DETERMINISTICALLY recreates drive-backed apps when it changes (replacing the fragile timed state-sample that could miss an app stopped at the sample instant). GuestBootID reads /proc/stat btime + field 22 of /proc/<init-pid>/stat (parsed after the last ) so a comm with spaces/parens does not break it).

v0.35.1 — shared-parent unit: run before pve-guests on host boot (2026-06-15)

Fix for the host-reboot ordering (the shared-parent oneshot never ran before pve-guests on the live host, so the guest bound a not-yet-shared parent → private bind → propagation broken). The unit now uses WantedBy=pve-guests.service (pve-guests PULLS IT IN + Before= orders it first) instead of the unreliable WantedBy=multi-user.target, and drops DefaultDependencies=no. EnsureSharedParent reinstalls the unit when its content differs (so the fix deploys on the next agent start/reconcile).

v0.35.0 — intermediary mount: guest-reboot re-propagation (load-bearing) (2026-06-15)

Fix for the guest-reboot gap (caught in the live demo migration). A guest's parent bind is NON-RECURSIVE, so on a guest reboot it does NOT carry the pre-existing drive submount, and mount propagation only delivers events created AFTER the bind exists — so an enrolled drive is bound on the HOST but INVISIBLE in the fresh guest namespace until re-bound. Without this, every guest reboot left the apps on empty dirs.

• AttachDrive now takes vmid and checks GUEST visibility (GuestSeesMount, reading /proc/<guest-init-pid>/mountinfo): if the host has the bind but the guest doesn't see it (post-reboot), it FORCE re-binds (umount + mount) to re-fire propagation into the current guest ns.
• A periodic reconcile (20s ticker in main) re-runs ReassertGuestBinds, so a guest reboot self-heals without an agent restart. EnsureSharedParent skips the unit re-install when already present (cheap on repeat).
• /disks BoundUnderParent now reflects GUEST visibility (not the host mount) — the accurate signal the controller's drive-absent gate keys on to stop/restart apps across a guest reboot.

v0.34.0 — intermediary mount model: shared-parent + host-side attach/detach + reconcile (2026-06-15)

The drive hot-swap re-architecture (SPIKE-intermediary-mount). Replaces the per-drive pct set -mpN bind (which needed a guest reboot to activate and bricked the guest when a drive was absent at boot) with a SINGLE permanent parent bind /mnt/felhom-drives plus host-side swaps underneath it.

• internal/localapi/intermediary.go — GuestBinder.EnsureSharedParent (mkdir + self-bind + --make-shared + installs/enables a felhom-shared-parent.service ordered Before=pve-guests so the guest's parent bind inherits the shared peer group as slave); AttachDrive (mount --bind /mnt/<name>/felhom-data /mnt/felhom-drives/<name> — propagates into the RUNNING guest live, no pct, no reboot; confined to felhom-data; the stable dir stays host-root-owned = fail-closed); DetachDrive (umount, leaving the bare fail-closed dir); StablePathForRaw/DriveNameFromRaw; isHostMountpoint.
• ReassertGuestBinds is now a pure HOST-SIDE reconcile: for each enrolled+present drive ensure its felhom-data is bound under the parent (no guest-config read, no slot, no reboot) — fixes F9 and drive-reconnect for free. Runs at startup (ensures the shared parent first).
• handleDiskGuestAttach uses AttachDrive (returns the stable guest_path); eject + decommission call DetachDrive. Legacy AttachBind/DetachBind retained for the transition (decommission still --deletes any lingering legacy mp).
• /disks reporting adds GuestPath (the stable /mnt/felhom-drives/<name> the controller repoints HDD_PATH to) and BoundUnderParent (live-in-guest signal for the controller's drive-absent gate).
• Provision adds the one permanent parent bind (-mp8 /mnt/felhom-drives,mp=/mnt/felhom-drives).

Tests (non-hollow + companions): TestGuestAttach_BindsUnderParent (uses AttachDrive not legacy pct), TestReassertGuestBinds_RestoresMissingBind (host-side reconcile, legacy AttachBind never called), TestStablePathForRaw_DriveName, TestDisks_GuestPathAndBoundUnderParent. Sudoers: new FELHOM_INTERMEDIARY alias (mount/umount under /mnt/felhom-drives, the unit install, the parent bind).

v0.33.0 — C1 net: pre-start self-heal hook + decommission mp-delete (2026-06-15)

The transitional defense for the C1 brick (B3 critical bug) ahead of the intermediary-mount re-architecture (which makes C1 structural). Two independent nets:

• Pre-start self-heal hook (internal/guesthook): a PVE pre-start hookscript runs felhom-agent guest-hook <vmid> <phase> which, for every BIND mountpoint whose source path is missing, creates an empty host-root-owned placeholder dir so the bind succeeds and the guest always boots — fail-closed (host uid 0 is unmapped in the unprivileged-LXC userns, so the guest can't write to the placeholder; a returning drive shadows it). It CREATES rather than DELETEs because pct set --delete in pre-start would take the config lock the start task already holds (dead-times-out → still bricks); the heal logic is in unit-tested Go, the wrapper just delegates. Installed + registered per-guest by the provision back-half (InstallSnippet/Register).
• Decommission mp-delete (GuestBinder.DetachBind + handleDiskDecommission): decommission now runs pct set <vmid> --delete mpN on the slot binding the drive (lock-safe on the running guest), so its now-missing source can't brick the next reboot. The old handler unmounted but left the dead mpN in config — the exact B3 C1 bug. Eject keeps its mp (temporary; the hook covers a reboot-while-ejected).

Tests (non-hollow, each with a companion that fails the pre-fix/trivial impl): internal/guesthook/heal_test.go (selector ignores storage volumes + present binds, heals only the absent one; "return nothing"/"return all" both fail) and TestDecommission_DeletesGuestMount (asserts the correct slot is --deleted; pre-fix never calls DetachBind → fails).

Sudoers: new FELHOM_GUESTHOOK alias (snippet install, pct set --hookscript, pct set --delete mpN).

v0.32.0 — self-serve decommission + intent-aware re-assert (B2a) (2026-06-14)

Customer-self-serve storage decommission (no operator signature; non-destructive — never formats), plus the load-bearing fix that keeps a decommissioned drive from auto-rebinding into the guest.

• POST /disks/decommission (internal/localapi/disks.go handleDiskDecommission, route in server.go) — mirrors handleDiskEject exactly: withGuest self-scoping, scopedFromBody, and the same user-data role gate (roleForMountPath must be RoleUserData, else 403; fail-safe-to- protected on ambiguity) so a compromised controller can't decommission system/backup storage. It records a PERMANENT IntentDecommissioned, prunes the GuestBindStore entry (hygiene), and unmounts (so the drive is physically removable). It NEVER calls any format/mkfs path — the data stays on the drive. The operator-signed DecommissionExecutor + reconcile.Classify classification are untouched (the absent-drive/DR route).
• ReassertGuestBinds is now intent-aware (THE correctness fix): the startup re-assert skips any durable-id whose intent is not enrolled, so a decommissioned- (or ejected-) but-still-present drive is never auto-rebound into the guest on agent restart. A nil intent store falls back to legacy bind-all (matching the watchdog's nil-intent rule). Covers both the self-serve and the operator- signed decommission paths (both land on IntentDecommissioned).
• GuestBindStore.Remove(vmid, durableID) (internal/localapi/guestbindstore.go) — idempotent (absent = no-op), atomic tmp+rename like Record; drops the vmid key when its set empties. Re-enroll re-Records via the existing recordGuestBind on guest-attach, so Remove doesn't break re-commission.
• IntentRecorder extended with SetDecommissioned + Get (both already on *storage.IntentStore).
• Non-hollow tests (internal/localapi/decommission_test.go): role-gate refuses system/backup (403, no unmount); decommission sets intent + removes the bind + unmounts + never formats; intent-aware re-assert does NOT rebind a decommissioned-but-present drive (companion: enrolled DOES rebind; the intent-blind pre-fix code fails this); re-commission re-records; Remove idempotency + persistence.

v0.31.0 — live-drive F9 + F20-BUG2 + F20-BUG3 (disk bind/wipe) (2026-06-14)

The last live-drive findings, all disk/localapi-side, implemented + deployed on felhom-pve and validated live on guest 9201 (approach: attach-to-existing, no re-provision — see the audit fixspec).

• F9 — guest data-drive bind survives a re-provision (4cd1d02). The in-guest bind (pct set -mpN) is config state a destroy+re-provision drops, and nothing restored it → a re-provisioned guest came up with its enrolled HDD unattached. New GuestBindStore (durable-id-keyed, per guest, recorded at guest-attach) + ReassertGuestBinds on agent startup re-adds any bind a guest is missing — only when the durable-id still resolves to a present drive (a swapped/absent disk is never auto-bound), idempotent. Plus DiskInfo.GuestAttached — the missing "bound into THIS guest" signal (vs mere host presence; resolves the F2 hdd_configured disagreement). Live-proven: dropped the bind, restarted the agent (real trigger) → re-attached with no manual call; reboot activated it; an HDD app then deployed onto the drive with data on /dev/sdb1.
• F20-BUG2 — one wipe durable-id scheme (a2a76e7). /disks advertised only durable_id (uuid:, used for assign), but the wipe gate resolves byid:/byuuid: → confirming a wipe with the advertised id was a binding_mismatch. New DiskInfo.WipeDurableID via a shared s.deviceDurableID seam used by BOTH the list and the gate, so the id the customer copies is the id the gate accepts. Live-proven: a confirmed wipe using /api/disks's wipe_durable_id is accepted (no mismatch).
• F20-BUG3 — format runs detached; survives a request deadline AND an agent restart (4777f8a). mkfs ran under the HTTP request context, so a client deadline SIGKILLed it mid-write → corrupt disk. Now mkfs runs off s.baseCtx via a persisted formatJob record; the handler still returns the synchronous result (backward-compatible) but a dropped request no longer kills it. New GET /disks/format/status; RecoverFormatJob on startup re-runs an interrupted durable-id-bound format (re-resolved; anti-retarget — a blank/path-bound or unresolvable job is not auto-re-run). Live-proven on the 916 GB felhom-usb: a 2 s client timeout left a ~30 s mkfs running to a clean ext4 (the live-drive corruption is gone); an agent restart mid-format was recovered + completed to a clean fs.

Security fix (from the 2026-06-13 deep-sweep audit). The inline customer-confirmed wipe in internal/localapi/disks.go handleDiskFormat inspected and gate-bound the device by its durable id but then ran mkfs on the caller-supplied mutable /dev path (req.Device). A USB re-enumeration reassigning that /dev node to a different physical disk between inspection and mkfs (a classify→mkfs TOCTOU) could wipe the wrong drive.

• New internal/localapi/wipe_reresolve.go: antiRetargetResolve (injected-deps, unit-tested) mirrors signedjobs.WipeExecutor.Execute — resolve the confirmed durable id → current device, re-derive the device's durable id and require an exact match, re-inspect (still data-bearing), and return the re-resolved device. (*Server).reresolveDurableForWipe wires the real storage funcs.
• handleDiskFormat now formats the re-resolved device, never req.Device; any refusal → 409 Conflict, no mkfs. Injectable reresolveWipe seam on Server (defaults to the real path).
• Tests: wipe_reresolve_test.go covers happy-path, empty/gone/blank, re-inspect-error, and the core retarget-mismatch-refused case. Round-trip safe for legitimate wipes (DeviceDurableID ↔ ResolveDurableDevice schemes match). Agent-only deploy; no golden rebake. See AGENT-001-FIX-NOTES.md.

v0.29.1 — lanresolver: RESTART dnsmasq on change (not reload) — fixes stale split-horizon IP (2026-06-13)

Bug: after a guest's DHCP IP moved (e.g. the v0.29.0 9201 re-provision: .151 → .141), the LAN split-horizon resolver kept answering the OLD IP, so LAN clients (via Pi-hole's conditional forward to the host dnsmasq) resolved *.demo-felhom.eu to the dead IP. Root cause: lanresolver.Manager updated the per-customer drop-in (address=/<domain>/<ip>) correctly but then ran systemctl reload dnsmasq (SIGHUP) — and dnsmasq's SIGHUP does NOT re-read its config files (/etc/dnsmasq.d/*.conf); it only clears the cache + re-reads /etc/hosts/addn-hosts. So the changed address= directive never took effect until a restart. Fix: reload() → restartDnsmasq() (systemctl restart dnsmasq) for every config-drop-in change (ReconcileGuest IP change, EnsureDnsmasq base change, Remove/decommission). Restart is sub-second and the records carry local-ttl 0, so downstream forwarders don't cache a stale answer. (Live: after the fix + a one-time host dnsmasq restart + a Pi-hole cache flush, *.demo-felhom.eu resolves to the live guest IP again; future IP moves now self-heal on the loop's next tick.)

v0.29.0 — OS / Docker-data storage split: golden + provision (2026-06-13)

Phase 1 of the storage-split slice (Phase 2 = felhom-controller v0.58.0 prevention layer). The controller guest's OS rootfs and Docker data are carved onto separate local-lvm volumes for RESILIENCE — an isolated OS rootfs stays bootable + agent-recoverable if the Docker volume fills.

• configs/build-golden.sh — split baked in: --rootfs ${ROOTFS_STORAGE}:${OS_SIZE_GB} (default 32, was hardcoded 8) plus --mp0 ${ROOTFS_STORAGE}:${GOLDEN_DOCKER_GB},mp=/var/lib/docker,backup=1 (default 16). The baked controller + infra images land on the data volume and travel inside the golden archive (no empty-volume shadowing, no deploy-time pull). backup=1 is MANDATORY — extra LXC mountpoints default to backup=0 = EXCLUDED from vzdump (spike B3), which would drop the images from the archive entirely. The script now also bakes Docker log rotation into daemon.json (max-size 10m, max-file 3 — prevention layer 2D), asserts /var/lib/docker is a separate mount, and aborts if vzdump excludes mp0.
• internal/reconcile/bringup.go — sized provision: GuestMount gains Backup (emits ,backup=1 — closes the spike-B3/B5 silent-DB-loss trap at the mount builder). BringUpSpec gains DataVolGrowGB + DataVolMount (default mp0): provision GROWS the golden-carried Docker-data volume online to the per-customer target (grow-only, spike B4) rather than attaching a fresh empty volume that would shadow the baked images. Plus RootfsGrowGB for the OS rootfs.
• CLI seam: --selftest=bring-up|provision gain -rootfs-grow / -datavol-grow / -datavol-mount flags. Per-customer sizing source = flags now, the slice-10 hub storage manifest later.
• RUNBOOK-provisioning-storage.md (new): the split provisioning procedure + fresh-PVE-install thin-pool carving knobs (hdsize/maxroot/maxvz, spike B4) + the per-customer sizing seam.
• Tests: buildBringUpConfig backup=1 emission; bring-up issues rootfs + data-volume resizes.

(no version) — storage OS/data-split spike findings (2026-06-13)

Investigation only — no code changed. Findings report: REPORT-storage-split-spike.md (gates the provisioning spec for splitting the controller guest's OS rootfs from its Docker/data onto separate local-lvm volumes). Proven on a throwaway unprivileged LXC (9300, since destroyed): Docker data-root on a second local-lvm mountpoint works (overlayfs/ext4, no idmap issue, reboot-survives); the move-then-verify migration is safe (copy-not-move). Key finding: additional LXC mountpoints are excluded from vzdump by default — they need backup=1 set and a CT restart — so the docker-data mount must be attached with ,backup=1 or named-volume DBs silently fall out of PBS. The exact seam is internal/reconcile/bringup.go:313 (buildConfigParams), which today builds mpN without a backup= flag; GuestMount should carry the flag. Per-customer sizes belong in the slice-10 hub storage manifest (marked at bringup.go:49-50); the golden rootfs is hardcoded 8 at configs/build-golden.sh:40.

v0.28.0 — backup re-target → felhom-pbs (offsite DR) + operator-signed decommission (2026-06-12)

Whole-guest backup now defaults to the offsite PBS tier (real DR). BackupConfig.BackupTarget() returns the configured backup.local_backup_target or, when empty, the new default felhom-pbs — a PBS datastore on SEPARATE HARDWARE (the DooPlex box), so a host disk/hardware failure no longer takes the backups with it. The target stays fully configurable (set local_backup_target to local/other to override); no call site hardcodes it. All NewBackupRunner sites (restore-test scheduler, local-API, --selftest=backup/restore-test) route through BackupTarget().

Proven live on demo-felhom before the re-point (PHASE 0 gate):

• snapshot-mode vzdump → felhom-pbs still fires the create storage snapshot 'vzdump' marker, so the 8B.2 early-resume/quiesce signal survives a PBS target (the marker is mode-driven, not target-driven);
• the restore-test enumerates PBS backups through the SAME generic StorageContent (/nodes/<node>/storage/felhom-pbs/content returns content:"backup" + ctime/vmid/volid), so PickRestoreCandidate/latestArchive need NO PBS-client change;
• pct restore from a PBS volid round-trips cleanly (storage.cfg encryption key applied transparently);
• PBS gotchas (ignore-verified, node-from-UPID, privsep) touch only the verify-API path, not vzdump/restore.

Operator-signed decommission now reachable (slice 10 P3 completion). The previously-unreachable IntentDecommissioned state (no production caller) is now reached ONLY via a gate-VERIFIED operator signature — never customer-confirmable, distinct from a safe eject. New internal/signedjobs DecommissionExecutor (op decommission, classified destructive in reconcile.Classify) calls IntentStore.SetDecommissioned, keyed by the drive's STORAGE durable-id (the watchdog's key, e.g. uuid:<fs-uuid> — NOT the device-level byid:/byuuid: scheme storage_wipe uses), so the recorded intent actually gates future remounts. New ExecutorChain lets the signed-jobs runner serve both storage_wipe and decommission; the runner wiring moved below the intent-store open in main.go. felhom-opsign builds decommission params from -durable-id. No controller/customer UI — the operator path is hub jobs-queue → signed-jobs runner.

Restore-test now boot-verifies slice-10 enrolled guests (bind-mount mountpoints). A guest whose data drive is a host BIND mount (slice-10 P2 mp0) could not be vzrestore'd by the privsep token ("restoring 'mpN' to bind mount is only possible for root") — so the restore-test failed for every enrolled guest, regardless of backup tier (surfaced during the felhom-pbs live validation). The restore-test now reads the SOURCE guest config (vmid parsed from the archive volid — PBS ct/<vmid>/ and vzdump vzdump-lxc-<vmid>- forms) and passes RestoreLXCOptions.MountOverrides that neutralize each bind-mount mpN to a throwaway 1G volume on the restore storage (needs no root; the boot-verify doesn't need the drive's data, and the host paths would otherwise collide). Storage-backed mountpoints are restored normally; best-effort (an unreadable source config restores as-is). proxmox.RestoreLXC gained MountOverrides. Verified live: restore-test from felhom-pbs of bind-mounted guest 9201 → boot+running PASS.

v0.27.0 — slice 10 P3: self-heal watchdog reconcile + 4-state intent model (2026-06-12)

The storage watchdog goes from detect-only → detect-and-reconcile: the agent autonomously re-mounts an enrolled external drive that dropped out-of-band (the colleague's Proxmox unmount), gated by a persisted INTENT model so it never auto-adopts an unknown drive or fights an official eject.

• internal/storage/intent.go — IntentStore — durable, durable-id-keyed (UUID/WWN, never sdX/path), atomic-write 4-state model: new (not recorded → never auto-mount), enrolled (desired mounted → reconcile drift), ejected (intentional unmount → leave alone), decommissioned (permanent). OnAbsent clears ejected→enrolled so a replug auto-mounts (the replug rule). Records intent ONLY through the official enroll/eject paths — an out-of-band unmount records nothing and is healed. Tests cover the states, persistence, the replug rule, and the reconcile gate.
• watchdog.go — intent-gated reconcile + flapping guard (3C) — the re-mount candidate (device present, not mounted) now fires ONLY for an enrolled drive (via IntentReader); a present→absent transition (device gone) calls OnAbsent. Exponential backoff (debounce·2^fails) + an alert after 4 failed cycles + a hard stop after 8 (no infinite loop). Failure = "still not present a full backoff window after we dispatched" (a slow async re-mount isn't miscounted). Tests: colleague-unmount→ reconciled; ejected/new/decommissioned→left alone; ejected→absent→replug→auto-mount; flapping→caps.
• internal/localapi — POST /disks/guest-attach records enrolled; POST /disks/eject records ejected (BEFORE unmount, while the durable-id still resolves) via the new IntentRecorder. main.go opens one IntentStore (<StateDir>/drive-intents.json) shared by the watchdog + local API; open failure degrades to ungated legacy remount (logged).

v0.26.0 — slice 10 P2 activation: guest-reboot endpoint (user-triggered drive activation) (2026-06-12)

A drive enrolled into a RUNNING unprivileged guest can't be live-activated (proven: pct set won't hot-apply; /proc/<pid>/root bind → mount-locking refusal; nsenter -m loses the host source). So the bind activates at the next guest boot. This adds the user-triggered restart path.

• POST /guest/reboot (internal/localapi) — self-scoped (vmid from token). Runs pct reboot <vmid> detached (it blocks ~30s until the guest is back) and returns 202 immediately, so the calling controller gets a clean response before the reboot takes it down (the agent is host-side and survives). GuestBinder.RebootGuest over the fenced runner. Tests: TestGuestReboot_Accepted (202 + RebootGuest invoked for the token's vmid), TestGuestReboot_CrossGuest403 (body vmid mismatch refused, no reboot). Pairs with controller v0.49.0 (pending-activation detection + "Újraindítás most").

v0.25.0 — slice 10 P2: bind enrolled user-data drives into the guest (passthrough) (2026-06-12)

External user-data drives are mounted on the HOST but were never passed INTO the guest (diagnosed Branch A), so apps silently wrote to the rootfs and the controller couldn't see them. This adds the guest passthrough. Spike-proven on 9201 first (see REPORT / the usb-passthrough-spike findings): pct set bind form (host path, never storage:size), chown to the guest base (idmap not clean for mixed-ownership data), shared:49 propagation host↔guest automatic.

• POST /disks/guest-attach (internal/localapi) — self-scoped (vmid from token). Binds an enrolled drive's felhom-data namespace into the guest at /mnt/<name> (Model A: the felhom-data dir is the bind source mounted AT /mnt/<name>, so only Felhom's namespace crosses into the guest — the customer's other data on the drive never does). Idempotent (returns the existing slot if already bound); picks the lowest free mpN; validates where is /mnt/<name> (no traversal).
• GuestBinder (internal/localapi/guestbind.go) — the host-root steps over the fenced proxmox.Runner (same pattern as the provision back-half's bind): mkdir -p <drive>/felhom-data → chown 100000:100000 the namespace ROOT (not -R; per-app subdirs are chowned at deploy) → pct set <vmid> -mpN <drive>/felhom-data,mp=/mnt/<name> (RW bind). The namespace is created fresh + uniformly owned, which sidesteps the drive's pre-existing mixed-ownership data entirely.
• Tests — TestGuestAttach_*: free-slot selection (mp0 when mp9 taken), idempotency (no re-bind + already:true), bad-path rejection (traversal/non-/mnt/multi-component), not-configured 503.

Pairs with felhom-controller P2C (enroll triggers attach) + the golden's /mnt:rslave controller bind (P2B). Self-heal reconcile (P3) and dual-role (P4) follow.

v0.24.0 — role-gate the eject path (system/backup mounts are unmount-protected at the agent) (2026-06-12)

Closes the eject gap in the storage-authorization redesign: POST /disks/eject now refuses to unmount a system or backup storage, enforced at the agent — not just hidden in the controller UI. A direct API call (or a compromised controller) trying to eject {where:"/var/lib/vz"} or the PBS mount is refused 403; only user-data mounts are ejectable.

• handleDiskEject (internal/localapi/disks.go) — before Unmount, resolves the AUTHORITATIVE protection role of the storage mounted at where (the agent's own storage-view + host-topology classification, never the caller's claim) via the new roleForMountPath. Refuses (403, no Unmount) unless the role is user-data. Fails SAFE: an unresolvable mount (view error or no storage target at that path) → treated as protected → refused (the same most-protected-on-ambiguity default the wipe gate uses). Mirrors the wipe path's "protected — eject refused by role" logging.
• roleForMountPath + hostReader seam — roleForMountPath keys RoleForStorage on the mount path (the eject input), mirroring deviceRole. Options.HostReader (optional; defaults to the production *storage.ProcHostReader) injects the root-free topology reader so the role-gate is unit- testable. handleDisks/deviceRole now share the same seam.
• Tests — TestEject_RoleGated asserts a system and a backup mount are refused with no Unmount, a user-data mount ejects, and an unresolvable mount fails safe to refused (the same non-hollowness the wipe tests use). TestEject_UnmountAndDependents updated to a user-data target.

v0.23.0 — device-ROLE classification + tiered storage-wipe gate (system/backup operator-only, user-data customer-confirmable) (2026-06-11)

The storage-authorization redesign (agent half). The gate's destructive-wipe path is now tiered by the device's protection ROLE, which the agent classifies from its OWN inspection — never the caller's claim (the storage analog of classify.go's data-bearing verdict).

• internal/storage/role.go — DeviceRole (system | backup | user-data) + the authoritative classifier. RoleForStorage (storage-view targets) and RoleForRawDevice (a raw device, e.g. a fresh disk in the init flow) map a device to its tier via SystemDisks (the whole-disks backing /, /boot, /boot/efi, root-free reads). Rules: pbs → backup; lvmthin / builtin local / nfs / cifs / unknown → system; usb / local-dir on a non-system external device → user-data. Fail-safe: any ambiguity (system disks unknown, or an unrecognizable device topology) → system (most-protected) — never silently user-data.
• GET /disks — each DiskInfo now carries role. The controller drives the UI from it (system/backup get a lock + no destructive controls; user-data is customer-manageable).
• Gate tier (reconcile) — new CustomerConfirmable disposition + Gate.AuthorizeStorageWipe:
  • role=user-data → customer-confirmable: allowed iff the request carries an explicit customer confirmation bound to the device's durable id (the agent re-resolves the durable id and matches; a confirmation for one disk can't wipe another). No operator signature. A user-data drive is already within the in-guest controller's blast radius (it bind-mounts /mnt), so customer-confirmation adds no new reach. Recorded in the audit log with the durable id (AuditRecord.DurableID).
  • role=system/backup → unchanged operator-signature (pending_signature). The confirmed flag is IGNORED — a compromised controller asserting confirmed:true on a protected device is refused by role. Every other destructive class (guest_destroy, decommission, restore_overwrite, key_rotation) keeps operator-signature exactly as before.
• POST /disks/format — accepts confirmed + durable_id (inert for system/backup). The data-bearing path tiers by role: user-data customer-confirmed → mkfs; user-data unconfirmed → 403 needs_confirmation (+ the durable id to confirm against, NOT an opsign command); system/backup → 403 with the operator-signature pending op (as before). Blank devices stay benign mkfs.
• Tests — role_test.go (demo-storage mapping + fail-safe), storage_wipe_test.go (the gate refuses a confirmed wipe on system/backup → no exec; durable-id mismatch / missing-durable refused; unknown role fails safe), and the localapi format-handler branches (user-data confirmed → mkfs; user-data unconfirmed → needs_confirmation, no opsign; confirmed-but-protected → still refused).

Pairs with the controller's lockout + type-to-confirm UX + drive-list restyle.

v0.22.0 — expose durable_id in GET /disks (enable controller-side guided storage) (2026-06-11)

One-line, read-only addition: localapi.DiskInfo gains durable_id (mapped from StorageTarget.DurableID, e.g. "uuid:<fs-uuid>" for usb/local-dir). The de-privileged controller cannot read a device's fs UUID itself, yet POST /disks/assign mounts strictly by UUID — so without this it could not complete the guided init/attach flows. The controller strips the uuid: prefix to get the assign key. No new privilege, no behaviour change to format/assign/eject or the data-bearing gate. Pairs with felhom-controller v0.43.0 (the storage-management UI rebuild).

v0.21.0 — agent-managed split-horizon LAN resolver (internal/lanresolver) (2026-06-11)

LAN clients can now reach their guest directly at the same public hostname with the same real wildcard cert (no Cloudflare hairpin), via a host-side dnsmasq the agent manages. The host is the stable anchor (static LAN IP); the guest stays DHCP/ephemeral and the agent tracks its live IP.

• internal/lanresolver — renders a dnsmasq base drop-in (bind to the host LAN IP, no-resolv, upstreams) + a per-customer drop-in local=/<domain>/ + address=/<domain>/<guest-ip>. The proven two-line shape: local= makes dnsmasq authoritative for the zone so AAAA returns NODATA (no Cloudflare-AAAA split-brain — the guest has only link-local v6), address= is the wildcard A; all other names (and their AAAA) forward upstream unchanged.
• Manager ensures dnsmasq present (apt) + the base config + enabled, discovers the guest's live IPv4 (pct exec <vmid> -- ip -4 -o addr show dev eth0) and domain (read from the guest controller's pulled controller.yaml — the v2 bootstrap omits it), writes drop-ins write-if-changed, and reloads (not restarts) dnsmasq. Tolerates the early-boot pre-lease window (empty IP → skip+retry, never a blank record). Logs IP transitions.
• Loop — a 7th daemon goroutine: every interval (default 300s) it enumerates provisioned guests (/var/lib/felhom-agent/guests/<vmid>/) and reconciles each, so the resolver follows DHCP IP changes. Config lan_resolver.{enable,host_ip,upstreams,interval_seconds} (host_ip defaults to the local-API bridge IP). --selftest=lanresolver -vmid N.
• configs/felhom-agent.sudoers — new FELHOM_DNSMASQ alias (apt install dnsmasq; install felhom-.conf drop-ins; systemctl enable/reload dnsmasq; rm felhom-.conf; the two FIXED pct exec reads). The agent never touches /etc/resolv.conf (host's own resolution unaffected).
• Box-down robustness is a documented router config (DNS = [host-IP primary, upstream secondary]) so a box reboot degrades to the Cloudflare path, not total DNS loss — see REPORT install step.
• Spiked live on felhom-pve first (:53 free, host IP static 192.168.0.162, host DNS intact, full loop from a real LAN client returned the guest IP + AAAA NODATA + the real wildcard cert 200 0).

v0.20.0 — golden: stacks-dir bind + per-guest hostname/CT name + bake base-infra images (2026-06-11)

Lockstep with felhom-controller v0.41.0 + a golden rebake. Changes in configs/build-golden.sh and the provision path; no change to the proxmox/authz/token fences.

• Section-G mount fix (the load-bearing one): the in-guest controller writes app/infra compose stacks under /opt/docker/stacks inside its container, but the baked controller-bootstrap docker run never bind-mounted that path. So docker compose up (run by the GUEST daemon over the shared socket) resolved every relative bind source on the guest filesystem — silently creating empty dirs — which broke every bind-mounted stack (base infra AND customer apps like immich/nextcloud). The bootstrap unit now mkdir -p /opt/docker/stacks and adds a same-path host bind -v /opt/docker/stacks:/opt/docker/stacks (a named volume would NOT fix this). Empirically confirmed on guest 9201 before writing the fix.
• Per-guest container hostname (3A): the bootstrap unit derives customer.id from /etc/felhom-bootstrap/bootstrap.json with a portable sed parse (NO jq in the golden) and passes --hostname <customer-id> to docker run, so the controller's os.Hostname() (its hub-reported hostname) is the customer id, not the Docker container ID. Fail-safe: no parse → no --hostname.
• Per-guest CT/LXC name (3B): --selftest=provision now defaults -hostname to the (DNS-safe sanitized) -customer-id when not given, so the bring-up's existing SetConfig hostname step (bringup.go) names the CT meaningfully (e.g. demo-felhom) instead of inheriting the golden's felhom-golden. New sanitizeHostname (lowercase, collapse invalid → -, trim, ≤63).
• Bake base-infra images: the golden now also pulls the three PINNED, PUBLIC base-infra images (traefik:v3.6.7, cloudflare/cloudflared:2026.6.0, gtstef/filebrowser:1.3.3-stable) into its Docker storage so the controller's first-boot bring-up is OFFLINE-capable. A hard gate (docker manifest inspect) fails the bake early on a bad pin. Tags MUST match the controller's internal/infra constants.

v0.19.0 — bootstrap contract v2: agent relays the hub retrieval passphrase (no host key in the guest) (2026-06-11)

Lockstep with felhom-controller v0.40.0. Fixes the onboarding 401: a freshly provisioned guest's controller used to come up with the agent's host hub key baked in, which the hub's /api/v1/report (customer-scoped auth) rejects. The agent now bakes a v2 bootstrap carrying only what the controller needs to pull its own config from the hub — the agent never touches the customer-scoped key or CF tokens.

Changed — bootstrap contract v1 → v2 (internal/provision)

• SchemaV1 → SchemaV2 = "felhom.bootstrap/v2". DocCustomer drops name/domain/email (keeps id). DocHub drops api_key/host_id, adds retrieval_password (the customer's hub retrieval passphrase — SECRET). DocLocalAPI unchanged. The contract is byte-compatible with the controller's internal/bootstrap.Bootstrap (cross-repo round-trip verified).
• backhalf.go: renders the v2 Doc; validation now requires customer.id + hub.url + hub.retrieval_password (was customer.id + customer.domain). Write/0600/chown/pct set unchanged.
• cmd/felhom-agent/main.go --selftest=provision: new required -hub-password flag (the customer's hub retrieval passphrase; the customer must already exist in the hub). Stops baking cfg.Hub.APIKey / cfg.Hub.HostID. -customer-domain/-name/-email still accepted (bring-up may use them) but NOT baked.

Changed — configs/build-golden.sh

• Default CONTROLLER_IMAGE bumped off the stale :v0.35.0 → :0.40.0 (matches the registry's no-v tag convention; latent footgun fixed).

Tests

• doc_test.go/backhalf_test.go updated to the v2 shape (assert no api_key/host_id, retrieval_password present, customer carries only id). go build ./... && go test ./... green.

v0.18.0 — slice 10D: DR capstone — identity escrow + restore-mode consumption (agent side) (2026-06-10)

The agent half of the slice-10 DR capstone (closes slice 10). Grounded by both 10-series spikes (escrow-consumption + identity-restore). The hub half (recovery-mode toggle, re-enroll + credential rotation, directive serving) is hub v0.11.0. Operator-side rotation model (locked): the hub holds no Cloudflare write-power; the destructive tunnel/PBS rotation is the operator's step from a trusted environment (same spirit as 10B).

Added (internal/escrow)

• Identity escrow (identity.go): WrapIdentity/UnwrapIdentity (+ …Bundle) wrap the {tunnel_token, pbs_token} bundle under the SAME recovery code R via age (scrypt + ChaCha20-Poly1305 — a vetted passphrase-AEAD, not hand-rolled), reusing the K-escrow pty mechanism (passphrase via the tty, data via files; R/tokens never logged). Same two-factor, zero-knowledge shape as the K-escrow. A wrong R fails closed (no bundle). age is a runtime dep for the identity path (analogous to proxmox-backup-client for K).
• escrow.Create gains an optional IdentityBundle → also emits an IdentityBlob under the same R (additive; the K-escrow + 10C Consume paths are byte-unchanged). Self-verifies the identity round-trip before shipping.
• --selftest=escrow-create -identity-bundle <file> -directive <file> — also wrap + upload the identity blob + the non-secret DR directive (pbs repo/ns, expected key fingerprint, tunnel id).
• --selftest=identity-consume -blob <file> -keydest <file> (R via FELHOM_RECOVERY_CODE) — recover the identity bundle through the real code; tokens written 0600, never logged.

Tests

• identity bundle round-trips (wrap→unwrap byte-identical; blob is opaque ciphertext); wrong R fails closed + the blob stays retryable; input validation. K-escrow/10C tests byte-unchanged (additive). (age integration tests gated to a host with the age CLI.)

v0.17.0 — slice 10C: escrow consumption (productionize the spike) (2026-06-10)

Turns the throwaway 10C spike harness into a real, tested Consume path: recover the PBS key K from an R-wrapped escrow blob, gate it on the expected fingerprint, and install it for the restore. The spike already proved the crypto + real-data restore; this bakes its findings into production code. Agent-only — 10C reads the four inputs as parameters (so it stays standalone-testable); 10D sources blob/fingerprint/PBS-connection from the hub and prompts for R. Zero-knowledge holds: the hub serves everything except R (by hand from the customer), so a hub compromise alone still can't decrypt.

Added

• escrow.Consume(ctx, blob, R, expectedFingerprint, keyDest) — the consumption contract:
  1. Unwrap the blob (a copy — F-C6: the input blob is read-only → a failed Consume is retryable) with R; a wrong R fails closed at the scrypt KDF (F-C3) → a clear, R-free error, nothing written.
  2. Fingerprint gate (F-C4) — KeyFingerprint(recovered) must equal the expected (the hub knows it); a mismatch fails fast + loud, no install, no restore attempted.
  3. Atomic install (F-C2) at keyDest (0600, write-temp-sibling→rename); any failure leaves no partial install. The recovered key lives only in a 0700 tempdir that is always removed. Secret discipline: R and key bytes are never logged/persisted (only fingerprint prefixes); K is never mutated.
• --selftest=escrow-consume (-blob -fingerprint -keydest, R via env FELHOM_RECOVERY_CODE to keep it off the command line) — invokes the real Consume live (the spike's S3 via the production path, not a harness).

Tests (non-hollow)

• valid → key installed + KeyFingerprint(dest) == expected + 0600 + blob byte-unchanged; wrong R → error, no file at dest, blob unchanged; fingerprint mismatch → fail fast, no install (the gate runs before any restore); input validation; format-tolerant fingerprint compare (no empty-fingerprint gate-bypass); atomic-install permissions (integration tests gated to a host with proxmox-backup-client).

v0.16.0 — slice 10B: operator-signed destructive completion (offline key + signing CLI) (2026-06-10)

The security centerpiece: a destructive op runs ONLY on a verified, operator-signed authorization — signature valid against a pinned operator pubkey (never the hub's or the blob's), nonce unseen + durably burned, in-window, host-bound, and resource-bound to a DURABLE device id that execution re-resolves + re-inspects. Decision (a): offline operator key + signing CLI, hardware-key-ready (sk-/YubiKey via ssh-keygen). The key floor holds: the signing key is NOT in the hub and NOT in the agent. Concrete consumer: this closes the 8C data-bearing-wipe pending_signature gap. Pairs with hub v0.10.0.

Added

• cmd/felhom-opsign — the operator's offline signing CLI. Builds the canonical OpBlob by reusing authz.CanonicalBlob (the exact production path the verifier authenticates over — so signer + verifier can never drift) and signs it with ssh-keygen -Y sign -n felhom-op-v1 (hardware-ready). Output: a {op_blob_b64, sig_armored} envelope to hand to the hub jobs queue (optional --upload). Touches ONLY the operator's signing key.
• authz.CanonicalBlob — promoted to production (was test-only) so the CLI + verifier share one canonical-bytes source; params canonicalized (sorted keys, compact).
• internal/storage durable device identity (durable_device.go): DeviceDurableID (derive a stable byid:(wwn/serial)/byuuid: id from the world-readable udev symlinks — no privilege, no subprocess) + ResolveDurableDevice (re-resolve to the current /dev path; a path-only/unknown scheme is REFUSED). The resource-level anti-retarget.
• internal/signedjobs (new): the queue consumer. Runner fetches each opaque job → runs it through the gate (the LOCKED authz pipeline) → on all-pass hands the verified op to an Executor; the order is verify → nonce-burn (durable, in Verify) → execute → clear job. The WipeExecutor is the 8C consumer: resolve the signed durable id → re-derive + match (anti-retarget) → re-inspect (8C classifier) the device is still the data-bearing target → mkfs. A vanished/changed/non-data-bearing device or a path-only binding is refused even with a valid signature. Wired as a second EnvelopeObserver (runs on HasSignedOps).
• hub.Client.Jobs / CompleteJob + hub.MultiObserver; the 8C format refusal now surfaces the bound op (op + durable id + host) in its 403 pending_op + a felhom-opsign … hint.

Pinning / rotation

• Operator pubkeys are pinned via authz.signers (config, trusted path — provision/agent config, NEVER hub-alone), multiple keys (KeyID selects; role-scoped), so a backup/rotation key exists without a flag-day. Unchanged from the slice-4 verifier wiring; 10B activates the execute path.

Tests (real crypto, non-hollow)

• signedjobs runner over the real gate+verifier (in-Go minted SSHSIGs): valid → executor runs once + job cleared; replay (nonce burned) / non-pinned signer / expired / retarget (other host) / forged sig / no pinned signer → all rejected, executor never called; malformed envelope cleared.
• WipeExecutor: valid → mkfs runs; path-only, durable-id mismatch, device gone, re-inspect non-data-bearing, not-probed → all refused, Format not called.
• storage durable: wwn-preference, uuid-fallback, path-only/traversal refusal, round-trip, missing-device error (symlink tests gated to Linux — the agent's OS).

v0.15.0 — slice 10A: hub desired-state serving — the "Down" channel (2026-06-10)

The agent half of slice 10A. The control envelope (hub.ControlEnvelope) stops being "reserved — ignored" and becomes the live Down channel: a cheap change-notification on every heartbeat. The agent caches the hub's desired-state + its generation; only when DesiredGeneration advances does it fetch the full state (the heartbeat stays light, the heavy state moves on change). The engine then reconciles benign deltas and the gate marks an explicit destructive delta pending_signature (no signer in 10A → never executed; signed execution is 10B). Pairs with hub v0.9.0.

Added / changed

• internal/reconcile: DesiredGuest.Decommission — the canonical destructive desired-state delta (an EXPLICIT flag, not "absent from the list", so a partial hub list can never mass-destroy). The planner emits ActionDecommission → ClassDecommission → Destructive → the gate refuses it pending_signature. Reconcile now counts a pending_signature refusal as Result.Pending (expected, logged INFO) rather than a failure; any other refusal stays a real failure. ActionDecommission has no executor (slice 10B) — a defensive guard refuses to run it. New CachingProvider (thread-safe DesiredState + generation cache; Desired/Update/Generation) — the production DesiredProvider, replacing EmptyProvider in the daemon engine (empty until the hub serves intent → cold-start is a live no-op, unchanged).
• internal/hub: the ControlEnvelope fields are now active (DesiredGeneration drives the fetch, HasSignedOps noted). New wire types DesiredStateResponse + WireDesiredState (guests + forward-compat restore_directive (10D) / pbs_namespace / opaque storage_manifest+backup_policy) + WireDesiredGuest (vmid/run/spec/description/decommission). New Client.FetchDesiredState (GET /api/v1/hosts/{host_id}/desired-state, self-scoped to the client's own host). New EnvelopeObserver loop seam + SetEnvelopeObserver — the loop hands the envelope to the sync layer each cycle (hub does not import reconcile/desired).
• internal/desired (new): the Syncer — implements hub.EnvelopeObserver, fetches desired-state on a generation advance, maps the wire shape to the reconcile domain, and updates the CachingProvider. Caches the fetched generation (robust to a generation that advanced mid-fetch); a fetch failure keeps the last-known state. restore_directive is carried + logged, not acted on (10D). Wired in cmd/felhom-agent (daemon): provider → engine, syncer → loop.

Tests

• reconcile: a desired-state with one benign + one decommission delta → benign applied, destructive gated pending (not executed); Plan emits decommission-only for a decommissioned guest + classifies Destructive; CachingProvider update/isolation.
• desired: fetch-once-on-advance (no re-fetch on an unchanged generation), fetch-failure-keeps-cache, caches-the-fetched-generation.
• hub client: FetchDesiredState hits the self-scoped path with the bearer + decodes (incl. restore_directive); a 403 is a typed HTTPError.
• loop: the cycle notifies the observer + adopts PollIntervalSeconds; a report error skips the observer.
• cross-repo golden: testdata/desired-state.golden.json + control-envelope.golden.json decode + key-set guard, byte-identical with felhom.eu/hub.

v0.14.0 — slice 9: host metrics to the controller (GET /host/metrics + CPU-temp collector) (2026-06-10)

The de-privileged controller (slice 8C) sees only its own cgroup, so it can't read host health itself. Slice 9 re-serves the slice-4 collector's host + per-storage view to the customer over the local API, plus the one missing collector — CPU/chassis temperature — so the customer sees their box's health in the controller. Host-wide, token-authed, fresh (a live collect, not the 15-min hub snapshot). Assumption: one customer per host (the home-server model); if a host ever serves multiple customers, host-wide CPU/mem would leak cross-customer load → revisit then.

Added / changed

• CPU/chassis-temp collector (internal/hub/cputemp.go): SysfsTempReader reads the CPU package temperature straight from sysfs — hwmon (coretemp/k10temp/zenpower/cpu_thermal, preferring the Package id 0 input) then the thermal zones (preferring x86_pkg_temp/coretemp/cpu-thermal, falling back to acpitz). No external binary, no privilege (sysfs nodes are world-readable), so the root-CLI fence is untouched. Graceful-null: a missing sensor, an unsupported board, an implausible reading (outside 5–150 °C), or any read error all degrade to null ("n/a") — a missing sensor never fails the report. Wired into the collector via the new TempReader seam (nil-safe).
• HostMetrics.CPUTempC *int (cpu_temp_c) — new nullable wire field on the shared HostMetrics struct (same nullable contract as the disk SmartSummary.TemperatureC). It rides the hub report too (operator freebie) → cross-repo host-report golden updated.
• Collector.HostMetricsNow(ctx) — a fresh NodeStatus + CPU-temp read returning just the host block, the source for the local API (current cpu%/temp, not the 15-min snapshot). Collect() now also populates cpu_temp_c on the hub report. Collector.SetTempReader injects a fake in tests.
• GET /host/metrics (internal/localapi/host_metrics.go): host-wide health (cpu%/mem/load/uptime/cpu_temp_c) + per-storage capacity targets (total/used/fraction, thin-pool, SMART temp+wear). Token-authed via withGuest (host-wide data; cross-guest ?vmid= still 403). Best-effort on storage (a view error still returns the host block). Served only when the HostMetrics provider (the shared collector) is wired — else 503 "not configured". Wired in buildLocalAPIServer.

Tests

• cputemp_test.go: a fake /sys layout proves hwmon package-preference, hwmon first-input fallback, thermal-zone-by-type selection over a non-CPU hwmon, graceful-null on a sensorless host (no error), and rejection of implausible (0 m°C) readings.
• hostmetrics_test.go: HostMetricsNow populates the temp, gracefully nulls it, hard-errors on NodeStatus failure; Collect() carries the temp.
• host_metrics_test.go (localapi): populated host+storage with a valid token; cpu_temp_c:null serializes; 401 without a token (collector never invoked); 403 on a cross-guest ?vmid=; 503 when not configured.

v0.13.0 — slice 8B.2: quiesce downtime optimization (snapshotted phase) (2026-06-10)

The agent half of slice 8B.2. In snapshot mode, vzdump only needs the app-stopped state captured at the storage-snapshot moment; after that it reads from the snapshot and the app can resume. The agent now emits a snapshotted phase on GET /backup/status when the snapshot is taken, so the controller (v0.38.0) resumes its app early — app downtime drops from whole-backup to until-snapshot with no loss of app-consistency. Validated Phase-0 first on PVE 9.2.2: the marker is INFO: create storage snapshot 'vzdump'; downtime ~24s→~1s for a 934 MB guest.

Added / changed (internal/backup + internal/localapi)

• BackupRunner.BackupWithSnapshotHook(ctx, vmid, onSnapshot) — while the vzdump runs, a watcher tails the task log (TaskLogTail) for the create storage snapshot marker and fires onSnapshot once. The marker only appears in snapshot mode (stop/downgraded takes no storage snapshot), and the watcher also bails on backup mode: stop — so it never fires in stop mode. (Backup keeps its signature for the scheduler/selftest; both share one body.)
• /backup/status phase snapshotted (between running and done): handleBackup passes the hook → markSnapshotted flips the running job to snapshotted. done/failed semantics unchanged.

Tests

• localapi: snapshot mode → phase reaches snapshotted before done (gated fake holds the backup open); stop mode → snapshotted never emitted (stays running → done). runner: the watcher fires onSnapshot on the marker; in stop-mode log it never fires. snapshotWatchInterval is a package var so tests run fast.

v0.12.0 — slice 8C Phase A: disk endpoints + data-bearing classifier gate + mkfs executor (2026-06-10)

The agent half of slice 8C, Phase A (additive). Adds the host disk-management endpoints the controller's disk UI drives — with the 8C security invariant: the agent decides data-bearing-ness by inspecting the actual device (agent-internal evidence), NEVER from the caller's claim. A compromised controller asserting "this drive is blank" cannot wipe a data-bearing drive. (Controller rewire + disk-subsystem retirement + de-privilege are Phases B/C, felhom-controller.)

Added

• internal/storage — mkfs executor + data-bearing inspection. SudoHostOps.Format(device, fstype) (device-pinned, ValidateBlockDevice+ValidateFSType, narrow FELHOM_FORMAT sudoers — mkfs.ext4 -F / mkfs.xfs -f on a /dev/* path the agent fine-validates first). SudoHostOps.InspectDevice(device) → DeviceProbe (filesystem signature via blkid -p, partition table / partitions / mount via lsblk -J). DeviceProbe.DataBearing() is conservative: any signature / partition table / partition / mount — OR a probe that did not read cleanly — is data-bearing (fail-safe; an unreadable device is never called blank).
• internal/localapi — the §6 disk endpoints, all self-scoped (token→guest; cross-guest 403):
  • GET /disks — host drives + a data-bearing flag (UI hint). Read-only/benign.
  • POST /disks/assign — attach a drive as a mount (benign, additive → EnsureMount). Self-serve.
  • POST /disks/eject — safe-unmount (benign, data preserved) + the dependent guests that mount it (so the controller can warn which apps lose that storage).
  • POST /disks/format — the security centerpiece: the agent inspects the device itself; blank → benign → mkfs; data-bearing → ClassStorageWipe → the slice-4 gate → refused pending_signature (the operator-signed completion is slice 10). The caller's claim is ignored — only a device the agent reads as blank is formatted.
• storageGateAdapter bridges the format path to the slice-4 reversibility gate (no new gate/crypto).

Tests

• localapi (security matrix): blank device → mkfs called, gate not consulted; a data-bearing device → 403, mkfs NEVER called, gate consulted (pending_signature); an ambiguous/unprobed device → treated destructive (fail-safe); even a gate that allows does not format data-bearing in 8C; assign → EnsureMount; eject → Unmount + dependent guests; cross-guest → 403; bad device/fstype → 400; unconfigured → 503.
• storage: ValidateBlockDevice/ValidateFSType (whitelist + injection rejection); InspectDevice blank/filesystem/partition-table/mounted/failed-probe-fail-safe; Format invokes the right mkfs.*.

v0.11.0 — slice 8B: app-consistent backup — /backup/due policy + /backup/status phases (2026-06-10)

The agent half of slice 8B (doc 03 §8). Turns the 8A thin backup stubs into the real policy the in-guest controller's quiesce loop drives (controller half: felhom-controller v0.36.0). No hub change. The downtime optimization (vzdump --mode snapshot + a snapshotted phase) is the 8B.2 fast-follow; the hub-served per-guest policy is slice 10.

Changed (internal/localapi)

• GET /backup/due — real cadence policy (replaces the 8A "never backed up" stub): a guest is due when no successful backup is recorded OR the newest one is older than the agent-local cadence (backup.backup_cadence_seconds, default 24h). A successful POST /backup flips due to false for the window, so the controller won't re-quiesce in a loop. A failed backup does not satisfy the cadence. Returns age_seconds for diagnosis.
• GET /backup/status — real phases idle | running | done | failed + the job id, so the controller can poll a backup to completion (was: just the latest stored backup).
• POST /backup — returns a job id + running phase; tracks the in-flight job and is single-flight per guest (a second POST while one runs returns the same job — no concurrent vzdump). On completion the job transitions done/failed and the result is recorded to the store.
• Config: backup.backup_cadence_seconds + BackupCadence(); the local-API server takes the cadence.

Tests

• /backup/due: due when stale / no backup, not due within the window after a success, due again past the cadence, a failed backup does not count. /backup/status: running→done and running→failed (gated fake to observe the running phase). POST /backup single-flight (one vzdump for concurrent POSTs). All still self-scoped (token→guest).

v0.10.0 — slice 8A: agent local-API server + provisioning back-half (2026-06-10)

The host-agent half of slice 8A (doc 03 §6). Adds the per-guest local API the in-guest controller calls over the bridge, and the provisioning back-half that follows the slice-7 bring-up front half. Grounded by felhom.eu/documentation/tests/slice8a-channel-deploy-spike-findings.md (commit 4a81a96 — channel + deploy plumbing proven; the 5 gotchas resolved here). Controller half is felhom-controller v0.35.0. No hub change.

Added

• internal/localapi — the HTTPS local-API server (doc 03 §6), the per-guest authorization gate. Serves a persisted self-signed leaf with a stable SHA-256 fingerprint (generated once; a fresh cert each boot would invalidate every baked bootstrap pin). The 7 §6 endpoints, all self-scoped to the caller's own guest: GET /storage (this guest's mpN mounts + fast/slow class from the slice-5/7 storage view), POST /snapshot, POST /rollback, POST /backup (enqueued, crash-consistent — the app-consistent quiesce loop is 8B), GET /backup/due (thin in 8A), GET /backup/status, GET /restore-test/status.
  • Token store (tokenstore.go): durable, crash-safe per-guest token→guest map that persists only a SHA-256 hash of each token (the plaintext exists transiently at mint→write-to-mount, then is discarded), last-write-wins per guest, fsync'd append-only JSONL (mirrors the nonce store).
  • Self-scoping: the VMID is resolved ONLY from the token; an explicit vmid (query/body) that disagrees → 403 and the proxmox op is never issued for the other guest; absent/unknown → 401.
• internal/provision — the back-half: mint the per-guest token → render the stable bootstrap.json contract (schema felhom.bootstrap/v1; no registry credential — the controller image is baked into the golden) → write it 0600 → chown 100000:100000 (the unprivileged-LXC mapped guest-root, spike gotcha 1) → attach a read-only bind mount via pct set. Host-side only (F3 — the agent never enters the guest; no pct exec). The token plaintext is never logged and never returned.
• --selftest=provision — the full chain on-demand: bring-up (provision) front half + the back half; keeps the guest for the golden's baked controller-bootstrap unit to deploy.
• config.LocalAPIConfig (local_api) — enable + bridge listen_addr + cert/key paths + token store path. The server is an optional 6th daemon goroutine, disabled cleanly when unconfigured or on a token-store/cert failure (the daemon still reports/reconciles).
• configs/build-golden.sh now bakes the controller image (pulled once on the trusted build host, then docker logout — no cred baked) + a controller-bootstrap unit that deploys the baked image from the config mount on boot (no login/pull at deploy).
• configs/felhom-localapi-firewall.example — host firewall narrowing of the local-API port to the guest bridge subnet (nft/iptables/PVE variants; defense-in-depth — the token stays the gate).
• configs/felhom-agent.sudoers — a narrow FELHOM_PROVISION alias (chown 100000:100000 + pct set bind-mount, both confined to the agent-owned /var/lib/felhom-agent/guests/* path) for the non-root least-privilege deployment.

Security / design notes

• The local-API leaf is pinned by leaf-cert SHA-256 (decision: consistency with the agent's PVE/PBS pinning); the fingerprint is baked into each guest's bootstrap.
• The back-half's host-root ops (chown + bind-mount attach) are NOT added to proxmox.Privileged (which is fenced to its 3 exceptions) — they live in internal/provision and run through the shared Runner (direct as root, or sudo -n with the new sudoers alias). This is the per-guest provisioning host-root surface, host-side and F3-compliant.

Tests

• localapi: self-scoping (cross-guest snapshot/rollback/backup → 403, op never issued for the other guest; own-guest uses the token's VMID), 401 paths, /storage class mapping, /backup enqueue, the thin /backup/due, status scoping; the token store persists only the hash (plaintext never on disk), last-write-wins, survives reopen, uniqueness; the leaf fingerprint is stable across reload.
• provision: writes 0600 + chowns + attaches the bind mount with the right args; the token never appears in the Result; the cross-repo bootstrap.json contract key-set is pinned.

v0.9.0 — slice 7 close-out: PBS recovery-code escrow creation (2026-06-10)

The first code that touches the PBS client encryption key K and introduces the customer recovery code R. Default posture is zero-knowledge: Felhom holds an opaque R-wrapped blob (cannot open it), the customer holds R. Grounded by felhom.eu/documentation/tests/slice7-escrow-spike-findings.md (round-trip proven on a throwaway: the R-recovered key restores a real encrypted snapshot). Hub opaque storage is the felhom.eu half (hub v0.8.0); consumption/serving is slice 10.

Secret discipline (overriding)

R is crypto/rand, ≥128 bits, surfaced exactly once and never logged/persisted/committed; the wrap pty's echo is discarded so R can't leak. K is read by location, never modified (the live key file is byte-unchanged — Wrap operates on a copy), never logged.

Added

• internal/escrow — Create generates R (10 EFF-wordlist words ≈ 129 bits), wraps K under R via the PBS-native proxmox-backup-client key change-passphrase --kdf scrypt, and self-verifies the blob recovers K (fingerprint match) before shipping. The wrap is driven over a stdlib pty (x/sys/unix; spike F-A1 — the command is TTY-only) with output discarded (F-A2 — the pty echoes the passphrase). Opt-in outputs: (b) R-wrapped offline copy (two-factor, no extra trust) and (a) raw paperkey (single-factor, unrevocable — loud caveat).
• --selftest=escrow-create (-storage, -paperkey, -offline, -upload): surfaces R once to stdout (never the logger), prints the opaque blob's size/fingerprint/posture, and with -upload PUTs the blob to the hub (/api/v1/hosts/{host_id}/escrow, per-host key).
• Config: escrow section (posture default zero_knowledge, pbs_storage_id); PBSEncKeyPath helper (the <id>.enc key K).
• Runtime dependency on the proxmox-backup-client CLI (the PBS key+passphrase KDF).

Tests

• R entropy ≥128 / 10-word format / uniqueness; integration round-trip (wrap→unwrap fingerprint match, wrong-R fails, live K byte-unchanged, blob ≠ plaintext key) guarded to linux+proxmox-backup-client; the agent→hub wire-contract key-set (mirrors the hub's).
• Live-validated (demo): escrow-create → R (10 words) surfaced once, blob 383 B opaque, self-verify ok, live K sha256 unchanged, exact R absent from stderr/journal.

v0.8.0 — slice 7 Phase 1: unified bring-up reconcile job (provision + guest-loss DR) (2026-06-09)

The shared FRONT HALF of provision and guest-loss DR, as a journaled reconcile job mirroring the slice-6 restore-test's crash-safety — but it KEEPS the guest on success and applies a scenario-specific identity policy. Agent-only; no hub/wire change (the new guest auto-appears in the host-report via ListLXC). Grounded by the slice-7 bring-up spike findings (commit 3342993): F1 (restore preserves the archived MAC → provision reset is unconditional), F3 (SSH host keys do not auto-regenerate → a baked golden first-boot unit, not an agent guest-internal op), F4 (the transient PVE config-lock 500 → bounded retry).

Added

• reconcile.RunBringUp (bringup.go) — BringUpSpec (Mode provision|dr_guest_loss, Archive, VMID, RestoreStorage, Hostname, Cores/MemoryMB, RootfsGrowGB, Mounts, KeepMAC, BootTimeout) → BringUpResult (VMID, AssignedMAC, Pass, Verified, StartWarnings/Recognized). Sequence (each mutation preceded by journaling the owning entry): restore → identity reset → size → attach mounts → start LINK-UP. Verdict is liveness (waitRunning), never the start exitstatus (reuses the v0.7.0 WARNINGS surface). Success KEEPS the guest (no teardown).
• Scenario-specific identity reset (doc 03 §9): provision → fresh MAC unconditionally (PUT net0 with hwaddr omitted → PVE regenerates, F1) + hostname; machine-id + SSH host keys regenerate guest-side on first boot (golden bake + the new unit) — the agent does NOT touch guest internals. dr_guest_loss → preserve continuity (keep hostname; keep MAC unless KeepMAC=false); never resets restic/tunnel/hub identity.
• Compensating rollback — any mid-flight failure destroys the just-created guest (ClassGuestDestroy, benign via Provenance{SameTxnCreated:true}, gated); on teardown failure the entry is left in-flight for Recover. New journal flag Rollback + Recover's recoverBringUp reap a half-built guest left by a mid-job crash (idempotent, via ListLXC).
• F4 config-lock retry — steps 3+5 coalesced into ONE PUT config (net0+hostname+cores+ memory+mpN); rootfs grow stays its own call. setConfigWithLockRetry retries ONLY the transient PVE config-lock 500 (pveConfigLock: 500 + "can't lock file"/"got timeout"); any other error fails immediately — never retried.
• --selftest=bring-up (-mode provision|dr -archive -vmid -hostname [-keep]) — runs the real journaled job (after a Recover), then tears the guest down unless -keep.
• configs/build-golden.sh — the validated golden recipe as a script, incl. the F3 first-boot felhom-regen-hostkeys.service unit (Condition-gated: fires on provision, no-ops on DR). The slice-7 spike archive (which lacks the unit) is superseded.

Deferred (stated, not built)

• Provisioning BACK HALF (controller deploy, bootstrap, per-guest token mint) → slice 8.
• Host-loss DR + PBS escrow consumption → slice 10.
• The SOURCE of a BringUpSpec (hub desired-state: which archive/VMID/mounts) → slice 10; this job takes the spec as input. GuestMount is defined minimally (no hub coupling).

Tests

• provision happy path (fresh MAC = net0 without hwaddr, hostname, coalesced sizing+mount, rootfs grow separate, started, guest NOT destroyed); compensating rollback at each step (restore / config / start-task / waitRunning — asserts the guest WAS destroyed); DR continuity (MAC kept, hostname not reset) + DR KeepMAC=false resets MAC; liveness verdict (warnings+running pass / not-running fail); F4 (lock-500→retry→proceed; non-lock-500→fail without retry); owning entry journaled BEFORE restore; reserved/existing VMID refused; Recover rolls back / clean.

Live-validated (demo-felhom)

• provision: fresh MAC + hostname; SSH host keys regenerated by the baked golden unit (agent issued no ssh-keygen), machine-id unique, Docker runs, clean DHCP lease → torn down.
• dr: continuity preserved (hostname + host keys kept). Recover: a killed mid-restore left an orphan; the re-run's Recover rolled it back (idempotent).
• Live caught a bug, then fixed: the host-key unit's ExecStart was /usr/sbin/ssh-keygen (203/EXEC); on Debian 13 it is /usr/bin/ssh-keygen — corrected in build-golden.sh, golden rebuilt, re-validated. (Mocked unit tests couldn't surface this; the live run did.)

v0.7.0 — restore-test: verdict is liveness, not start-task exitstatus (2026-06-09)

Fixes a correctness bug found by the live hub-enrollment runbook: the self-restore-test reported pass:false on every modern-distro guest. PVE's guest-start task exits "WARNINGS: 1" for the benign systemd-nesting advisory (WARN: Systemd 257 detected. You may need to enable nesting.), and WaitTask treated any non-"OK" exitstatus as a hard failure — so the verdict was decided by an advisory exit code instead of by observed liveness, before the real boot check ran. A crying-wolf test got it disabled on the demo host; this re-enables it. Single bump (0.6.0→0.7.0) covering the agent's part of both task phases; the wire fields below are consumed by hub from v0.7.5.

Design invariant (in code): warning classification affects visibility only; pass/fail is liveness-only. A wrong/stale recognizer can at worst over-notice a benign warning — it can never false-fail and never hide a real warning.

Added

• proxmox.WaitOptions.AllowWarnings — opt-in per call. When set, a task that completes "WARNINGS: N" is success with the TaskStatus (ExitStatus intact) returned so the caller can read/surface it. Default (false) keeps every existing caller strict (vzdump/restore/destroy warnings can be meaningful — relaxing them is a future per-call decision with evidence). Any non-WARNINGS non-OK exit is still a *TaskError.
• reconcile.RestoreTestResult.StartWarnings / .WarningsRecognized + a version-free recognizer (benignWarningAnchor = "enable nesting", case-insensitive substring — contains no systemd version number, so it can't rot back into the bug at systemd 258+). extractWarningLines pulls WARN… lines from the start-task log.
• reconcile.GuestAPI.TaskLogTail — the engine fetches the start task's log to surface warnings.
• hub.RestoreTest.warnings / .warnings_recognized wire fields (omitempty), populated by ToHubRestoreTest. Additive: the deployed v0.7.4 hub ignores them; hub v0.7.5 consumes them (passed-with-warnings INFO, or WARN when not recognized). Cross-repo golden updated with the hub side.

Changed

• Restore-test start step (reconcile/restoretest.go) now waits with AllowWarnings:true, surfaces any start warnings, and continues to waitRunning as the verdict — boot+running is the pass, exactly as before; a real (non-WARNINGS) start-task error still fails. The restore and scratch-teardown WaitTasks stay strict.
• Restore-test scheduler logging distinguishes a clean pass, passed-with-recognized-warnings (INFO), and passed-with-unrecognized-warnings (WARN) — nothing silent.

Tests

• WaitTask: AllowWarnings accepts WARNINGS (status returned intact); AllowWarnings still fails a real error; default still fails on WARNINGS (existing callers unaffected).
• Restore-test (engine, mock proxmox): start-with-warnings + running → pass with warnings surfaced+recognized; unrecognized warning + running → pass, not-recognized; not-running → fail regardless of warnings (verdict is liveness); teardown still runs.
• Regression guard: the "enable nesting" recognizer matches the advisory for systemd 256–300, proving it's version-independent and can't silently rot back into the false-fail.

v0.6.0 — slice 6 Phase B: PBS offsite tier (verify + PBS-API client + reporting) (2026-06-09)

Completes slice 6. The PBS spike (felhom.eu phase5-pbs-spike-findings.md) proved backup-to-PBS and restore-from-PBS reuse Phase A UNCHANGED (PBS is just a storage target + a volid), and the operator token needs no widening. So the only new agent code is the verify capability + a small PBS-API client + PBSSnapshot reporting. Escrow + host-loss DR stay slices 7/10.

Added

• internal/pbs — the PBS-API client (the agent's SECOND privileged external surface, slice-1 discipline): TLS fingerprint-pinned to the PBS leaf cert (a spoofed PBS → rejected, mirroring the PVE pin), token auth (PBSAPIToken=<id>:<secret>; id from the storage username, secret read at runtime from /etc/pve/priv/storage/<id>.pw — referenced by location, never logged/committed), typed, no shell. Methods: Verify (POST /admin/datastore/<ds>/verify → UPID), Snapshots (incl. the verification field), TaskStatus/WaitVerify (node extracted from the UPID — localhost returns "unknown", the spike B4 gotcha), NodeFromUPID.
• The verify maintenance loop (pbs/verify.go) — the cheap, key-free, ciphertext-level integrity check (§8) on its OWN cadence (default 6h, the 5th daemon goroutine). It is a reporting/maintenance task like the slice-5 watchdog: it does NOT go through the reconcile gate/journal. Each cycle: trigger verify → poll task → re-list snapshots → record per-snapshot verify_state. A failed verify is logged loudly.
• PBSSnapshot reporting — filled the stub (namespace/backup_type/backup_id/ backup_time(RFC3339)/size_bytes/owner/protected/encrypted (from files[].crypt-mode) /verify_state (ok|failed|none until verified)/verify_upid). New PBSReporter collector seam + an in-memory SnapshotStore. Cross-repo golden (both repos, byte-identical)
  • bidirectional key-set tests; hub handler.go parses pbs_snapshots and logs a failed verify [WARN] (loudest offsite-DR signal).
• Truthful backup mode (backup/runner.go) — Backup.mode now reflects the ACTUAL vzdump mode read from the task log (backup mode: <x>), since PVE may downgrade snapshot→stop for a stopped guest (spike B1); falls back to the requested mode if unparseable.
• proxmox: Storage.Username (parsed from the pbs storage config — the token id).
• config BackupConfig.{PBSVerifyCadenceSeconds, PBSSecretDir} (cadence 0→6h, <0 disabled).
• --selftest=pbs-verify — discover pbs storages → verify each → print the PBSSnapshot records (covers the runbook's verify + list). Standalone on the host.

Notes

• Backup/restore-to-PBS reuse Phase A with no change (the restore-test runs with source_tier="pbs" when fed a pbs volid). Zero-knowledge holds: verify is ciphertext-level, the encryption key is never read here, and the PBS server has no client key (spike B6).
• Daemon runs cleanly with no pbs storage / verify disabled. go test -race covers the new goroutine. Slice-3/4/5/6A surfaces, goldens, and adversarial tests intact.

v0.6.0-rc1 — slice 6 Phase A: backup + the self-restore-test (local target) (2026-06-09)

Phase A of the backup/restore slice (doc 03 §8) — the agent's guest-level backup layer and the self-restore-test, which closes "a backup you haven't restored isn't a backup". Everything here is BENIGN (backup, restore-to-NEW, scratch teardown): reuses the slice-4 classifier/gate/journal — no new destructive class, no new crypto. Local target only; PBS is Phase B. Restore is to a NEW guest only (no overwrite). Backups are crash-consistent only (app-consistency needs the controller quiesce, slice 8) — marked so in the report.

Added

• proxmox (mutate.go/query.go): DestroyLXC (DELETE …/lxc/{vmid}?purge=1&destroy- unreferenced-disks=1 → UPID; the scratch-teardown primitive); VzdumpOptions.Notes → notes-template (verified on PVE 9.2.2); LatestBackupVolID (resolve a produced archive from the backup-storage listing — the task status carries no result volid).
• reconcile self-restore-test (restoretest.go) — Engine.RunRestoreTest: pick a free scratch VMID (configured band, excludes 9999; full band → skip, never out-of-band) → journal a Scratch-owned entry BEFORE any mutation → restore-to-new → benign net link-down SetConfig (so the clone can't conflict with a running source's MAC/IP; this is test-safety, NOT slice-7 identity reset) → boot → verify reaches running → ALWAYS teardown (defer; benign ClassGuestDestroy + agent-tagged-scratch provenance, gated). Runs on the scratch VMID's queue lane. Reuses the journal/gate; result feeds the report.
• Crash-safe recovery (recover.go): a Scratch journal entry is resolved by TEARDOWN, not by re-checking the restore sub-task's UPID — special-cased BEFORE the generic path (else the restore task's OK would mark it succeeded while the guest leaks). Recover now destroys a leaked scratch guest (idempotent: already-gone → clean; list-unreadable → left in-flight for a later pass). JournalEntry.Scratch flag; RecoverResult.ScratchClean/ ScratchDestroyed. GuestAPI gains RestoreLXC/DestroyLXC/GuestStatus.
• internal/backup package: BackupRunner.Backup (vzdump + archive/size resolve + bulk-volume gap — a mountpoint is UNCOVERED unless it carries an explicit backup=1, so an unset backup= is reported uncovered too, the safe DR direction); PickRestoreCandidate (newest backup); an in-memory Store (latest-backup-per-target + latest-restore-test) implementing the hub BackupReporter/RestoreTestReporter seams; a cadence Scheduler (default 24h; the fourth daemon goroutine; disabled cleanly when off/misconfigured).
• hub report (report.go): filled the Backup + RestoreTest stubs (PBSSnapshot stays a Phase-B stub); collector BackupReporter/RestoreTestReporter seams. Cross-repo golden updated in BOTH repos (byte-identical) + bidirectional key-set tests for backups[0]/restore_tests[0]. Hub handler.go parses + persists them (report_json; no new columns) and logs a FAILED restore-test prominently (the loudest DR signal).
• config BackupConfig (local target, restore storage, restore-test cadence, scratch VMID band 990000–990009 default) + accessors + env overlay + cadence-gated validation.
• --selftest=backup -vmid N (one-shot backup → print the Backup record) and --selftest=restore-test [-archive volid] (Recover-then restore→boot→verify→teardown, print the RestoreTest record). Standalone on the Proxmox host.

Notes

• The daemon runs cleanly with the cadence off or misconfigured (logs + disables, never crashes); a leaked scratch guest from a mid-test crash is reaped by engine.Recover on restart. go test -race covers the new scheduler goroutine.
• Slice-3/4/5 exported surfaces, goldens, and adversarial tests intact. Version bumps to v0.6.0 when Phase B (PBS) lands.

v0.5.1 — slice 5 live-validation prep: durable_id mis-id fix + re-mount UUID memory (2026-06-09)

Two correctness fixes surfaced while preparing the live USB validation on demo-felhom (a real 1TB USB HDD, sdb1, ext4). Both are DR-load-bearing — exactly the "false-id → re-attach the wrong disk" failure mode the slice warned about.

Fixed

• Unmounted dir-storage no longer inherits the ROOT filesystem's UUID (observe.go). Previously, when a removable dir-storage was unmounted, the observer fell through to the containing mount (root) for the backing device, so its durable_id became uuid:<root-uuid> — a catastrophic DR mis-id (the hub would re-attach the wrong disk). Now the backing device/UUID/durable_id are derived ONLY from the target's OWN mountpoint; an unmounted target reports no device and a stable store:<name> durable_id, never another filesystem's UUID. (Removed the containingMountDevice root-fallthrough.)
• Watchdog remembers the fs-UUID observed while attached (watchdog.go) so a re-mount works even after the known-set cache refreshes mid-drop (an unmounted target can't resolve its own UUID). The re-mount key is backfilled from this memory — aligning with doc 03 §7's "sourced from the existing definition, no hub manifest needed": the agent learns the UUID while the target is attached, then re-mounts by it on return.

Tests

• Observer: an unmounted dir-storage asserts NO uuid: durable_id and no backing device.
• Watchdog: a drop where the cache lost the UUID still re-mounts using the remembered UUID.

v0.5.0 — slice 5 Phase B: the host-root surface (mounts + SMART + grow + destructive gate) (2026-06-09)

The write surface — the agent's first step outside its Proxmox API token into OS-root. Isolated behind a narrow, argument-validated, adversarially-tested seam, exactly like the slice-4 gate. Completes slice 5 (Phase A = read-only observe/report/watchdog at v0.5.0-rc1).

Added

• HostOps seam + SudoHostOps (internal/storage/hostops.go) — the one privileged host surface: persistent mounts via systemd .mount units keyed by fs-UUID (enabled to survive reboot), detach (stop+disable), SMART, and thin-pool metadata. Shells out via the fenced Runner (sudo -n, fixed arg vectors, no shell); a fake backs the tests (no real root in the suite). NoopHostOps is the safe fallback when the surface is unavailable.
• The argument validator (internal/storage/validate.go) — the security boundary: ValidateUUID (strict hex), ValidateMountPath (absolute, no traversal, no metacharacters), ValidateSMARTDevice (raw-disk whitelist), ValidateLVMName, and an in-process systemdEscapePath (no systemd-escape shell-out). Every argument is validated BEFORE a command is constructed. Headline test (validate_test.go): an adversarial matrix of shell metacharacters / ../ traversal / malformed inputs is rejected with zero exec.
• SMART (internal/storage/smart.go) — parses smartctl -a -j into StorageTarget.smart: SATA (reallocated/pending/offline-uncorrectable, temp, power-on-hours) and NVMe (critical_warning, media_errors, percentage_used, temp), degrading to UNKNOWN for devices with no SMART (USB-SATA bridges). lvs fills the lvmthin thin-pool metadata fill (the value Phase A left null). Wired into the Observer's enrichment (Observe only, not the watchdog's fast Known path).
• Watchdog re-mount response (internal/storage/watchdog.go) — on a known mount-backed target's device returning unmounted (a new DevicePresent liveness probe), the watchdog dispatches a benign by-UUID re-mount off the poll path (a goroutine, never under the lock), rate-limited per target to the debounce window. The mount is routed through the gate as benign (gateRemounter in main.go, so storage stays decoupled from reconcile).
• Disk-grow executor (internal/reconcile) — ActionResize (benign ClassResize), planned grow-only (desired DiskBytes > actual → pct resize rootfs +<n>M; a shrink is refused, never silently grown) + a defensive executor guard (size must start with +). New proxmox.Client.ResizeLXC (API; VM.Config.Disk+Datastore.AllocateSpace; async→UPID). Built + fixture-tested; unfed live (no hub spec until slice 10).
• Destructive storage ops through the slice-4 gate (internal/reconcile/storage_ops.go) — IntentForStorageMount (benign) and IntentForStorageDestructive (ClassStorageWipe/ ClassDecommission). Host/target-scoped: the op binds on the storage target identity (carried in target.guest_id). Reuses the existing verifier/role-scoping/binding/audit — no new gate, no new crypto. Storage cases added to the adversarial matrix (storage_test.go): unsigned wipe → pending_signature; "wipe A" signature vs "wipe B" → binding_mismatch; valid → accepted. Inert live.
• --selftest=storage [-watch <dur>] — the live USB-runbook harness: an observe pass (full table incl. SMART + thin-pool data+metadata), and a bounded watchdog window with the re-mount response live. Runs standalone on the Proxmox host (no hub).
• configs/felhom-agent.sudoers — the documented narrow allowlist (install unit / systemctl manage / smartctl / lvs), with the agent-side fine validation noted.
• Config: privileged.{unit_dir,stage_dir,systemctl,install,smartctl,lvs} (paths must match the sudoers entries).

Notes

• Daemon still runs cleanly with no removable storage / no signers / no hub manifest, and a missing/declined sudoers entry degrades with a warning (SMART→UNKNOWN, mount→logged error), not a crash. go test -race passes (the watchdog re-mount dispatches off the poll path).
• Slice-3/4 + Phase-A exported surfaces, goldens, and adversarial tests intact. authz untouched. The destructive-storage executor + grow are built/tested but unfed live until slice 10.

v0.5.0-rc1 — slice 5 Phase A: storage observe + report + watchdog (read-only, live) (2026-06-09)

Phase A of the storage slice (doc 03 §7). Read-only and live: the agent now observes every host storage target, reports it into the host-report's storage_targets (previously an empty stub), and runs a fast-poll watchdog that pushes a disconnect to the hub in seconds. No host-root writes this phase (mounts/SMART/grow/destructive-gate are Phase B). The hub-owned desired manifest (class/role/policy/creds) is not served until slice 10, so reconcile against it is built-but-unfed — this phase ships only the genuinely-useful read-only footprint.

Added

• internal/storage package (new):
  • StorageTarget wire contract (internal/hub/report.go) — filled the slice-3 stub: name/type/durable_id/state/reachable, usage (total/used/avail/ used_fraction), content, mount_path/backing_device, class_hint (rotational HINT — never authoritative; class is hub-owned), role (empty until slice 10), a thin_pool sub-object (lvmthin data fill; metadata fill is Phase B/lvs), and a smart sub-object (UNKNOWN until Phase B). Cross-repo golden kept byte-identical with felhom.eu/hub and guarded by the bidirectional key-set test (contract_test.go).
  • durable_id derivation (durableid.go) — deterministic per type (the DR-load-bearing re-attach key): fs-UUID (usb/local-dir), server:export (nfs/cifs), repo+fingerprint (pbs), vg/pool (lvmthin); never empty (falls back to a stable store id).
  • HostReader seam + ProcHostReader (hostread.go) — non-privileged /proc/mounts, /dev/disk/by-uuid, /sys/.../rotational + removable reads. Root-free by construction.
  • Observer (observe.go) — builds []hub.StorageTarget from ListStorage/NodeStorage joined with host reads; surfaces the lvmthin thin-pool data fill prominently (warns ≥85%).
  • Storage watchdog (watchdog.go) — a third daemon goroutine fast-polling the known target set (a defined Proxmox storage and/or a previously-seen one) for attached↔disconnected transitions; on a transition it triggers an immediate, debounced out-of-band host-report. Only flags a known target's change (never a never-attached device); coalesces flaps within the debounce window (leading + trailing edge). CachingKnownTargets rate-limits the Proxmox-derived known set; HostLiveness probes device/mount presence (local) + a reachability dial (network), all non-privileged.
• Proxmox Storage type (internal/proxmox/types.go) — additive parse-only config fields (server/export/share/datastore/fingerprint/vgname/thinpool) feeding durable_id.
• Collector StorageObserver seam (internal/hub/collect.go) — populates storage_targets via the observer; a nil observer or an observe error degrades to empty (never sinks the heartbeat). Hub does not import storage (storage imports hub for the wire type).
• Out-of-band report trigger (internal/hub/loop.go) — Loop.SetTrigger: a watchdog signal runs one extra collect→report immediately without disturbing the regular cadence.
• StorageConfig (internal/config) — watchdog interval / debounce / known-refresh knobs (all optional; package defaults otherwise).
• Hub ingest (felhom.eu/hub) — hostReportPayload now parses storage_targets (full mirror struct), persists them via report_json, counts + warns on disconnected targets, and has its own half of the bidirectional golden key-set test.

Notes

• The daemon still runs cleanly with no removable storage, no signers, and no hub manifest — the watchdog finds nothing to flag; storage reporting is best-effort.
• proxmox/hub/authz/reconcile exported surfaces + their golden/adversarial tests are intact. No host-root writes, no destructive paths, no SMART this phase (all Phase B).
• Version: v0.5.0-rc1 at the Phase-A checkpoint; v0.5.0 when Phase B lands.

v0.4.0 — slice 4 Phase B: reversibility gate + signed-op consuming layer (2026-06-08)

The security core of slice 4: hub-supplied intent stops being trusted for destructive change. Layered in front of the per-guest queue's executor — every mutation now passes the gate. Reuses internal/authz for all crypto (untouched surface). Inert this slice: no destructive deltas are served until slice 10, so the destructive path is classified, gated, and adversarially tested but not wired to live execution.

Added

• Classifier (classify.go, doc 03 §4) — benign vs destructive by provenance + data-bearing-ness, NOT by verb. The OpClass vocabulary (seeded by the committed slice-2 op_blob.json: guest_destroy) is the agent-side contract slice 10 matches. Destroy/overwrite of customer data is destructive UNLESS agent-internal provenance (same-journaled-transaction create → compensating rollback, or agent-tagged scratch) makes it benign. Provenance is journal-recorded and never populated from the hub (its zero value is the only thing an external intent may carry). Unknown op class fails safe → destructive.
• Reversibility gate (gate.go) — Gate.Authorize(intent, signed): benign → allowed unsigned; destructive → requires a verified, role-authorized, action-bound operator signature, else refused pending_signature, never executed. Every decision is written to an AuditSink (audit is a signal, never the guard).
• Signed-op consuming layer over authz — verifies via authz.Verifier.Verify (the locked pipeline, untouched), then enforces on the VerifiedOp:
  • Role-scoping (doc 04 §4) — recovery key authorizes key-rotation re-pins ONLY; operational key authorizes ordinary destructive ops + planned rotation.
  • Op-to-action binding — verified op + host + guest + params must match the gated action (a signature for guest X / op A can't authorize guest Y / op B); params compared semantically (key-order/whitespace independent).
• Signed-job orchestration (job.go) — RunSignedJob: idempotency dedupe (the op nonce as the journal key — a redelivered completed op is skipped, not re-run), gate authorization, then journal-wrapped execution via an injected DestructiveExecutor (nil this slice — authorized destructive ops are inert, no executor wired until 6/7).
• Crash-recovery consumer (recover.go, Note 1 / doc 03 §10) — Engine.Recover consumes the journal's InFlight() at startup: an op that crashed AFTER the Proxmox POST and BEFORE its terminal record (OpTaskRunning, nonce already consumed) is NOT covered by idempotency dedupe — only this resume-or-rollback resolves it (re-read the task via the new TaskStatusOnce, record the real outcome; a no-task-id op is abandoned fail-safe). Landed together with the signed-op executor, as Note 1 required.
• Daemon wiring — runDaemon builds the verifier from config.Authz.Signers (a bad key / missing nonce-store path is a fatal misconfig; no signers = nil verifier, the common slice-4 state), constructs the gate (+ SlogAudit), runs Recover before issuing any mutation, and routes every reconcile action through the gate.

Changed

• Memory comparison canonicalized (Note 2) — desiredMemoryMiB makes the desired↔actual memory compare in the same MiB unit that is then written, so a non-MiB-aligned MemoryBytes converges in one pass instead of re-issuing SetConfig forever (the numeric cousin of the description-newline normalization). Test proves convergence. Slice 10 should still serve MiB-aligned specs at the source.

Tests (the security proof — each independently rejected)

• Adversarial matrix via the REAL authz.Verifier with in-test-minted SSHSIGs (framing replicated in reconcile's test binary; production authz untouched, no signing added to the verify-only package): unsigned destructive job → pending_signature; unsigned destructive desired-state delta → pending_signature (distrusts hub desired state, not just jobs); forged/unknown signer → ErrUnknownSigner; expired → ErrExpired; replayed nonce across an agent restart (durable FileNonceStore) → ErrReplay; wrong host → ErrTarget; wrong guest / wrong op / wrong params → binding_mismatch; recovery key on ordinary destructive → role_denied; hub-supplied "scratch" tag ignored → still destructive → refused; valid + role + target + fresh nonce → accepted, and a second presentation → ErrReplay (nonce consumed).
• Classifier (benign/destructive/provenance/key-rotation/fail-safe), role-scoping, params binding, crash-recovery (resume OK / fail / still-running / no-task rollback / unreadable / one-shot key applied on resume), signed-job idempotency (execute once, dedupe redelivery, refused-not-executed, no-executor-inert, executor-error).
• Full module race-clean (go test -race) + vet clean on the Linux build server.

v0.4.0-rc1 — slice 4 Phase A: reconcile engine (structural; runs live, unfed) (2026-06-08)

The agent-side control core's structural half. Checkpoint marker — -rc1 is the Phase-A push; awaiting validation before Phase B (the reversibility gate + signed-op consuming layer) lands the final v0.4.0. Runs LIVE but UNFED: with no desired-state provider until slice 10, the live engine computes an empty action set and performs zero mutations.

Added

• internal/reconcile package — the engine, the per-guest serializer, the desired-state model, the normalization layer, and the durable op journal:
  • Per-guest serializer (Queue, doc 03 §10) — the single choke point ALL mutation sources funnel through. Same-vmid jobs run strictly one-at-a-time in submit order; independent vmids run in parallel. Each vmid is a cond-var FIFO lane (unbounded, non-blocking, order-preserving); graceful drain on Close.
  • Desired-state model + DesiredProvider seam — DesiredGuest (per-field optional: run-state / *hub.GuestSpec / *description), DesiredState. The only live provider is EmptyProvider (slice 4 has no source); StaticProvider feeds fixtures. The seam is where slice 10's hub-serving plugs in — no hub/local source invented here.
  • Normalization layer (FieldNormalizers) — reconcile compares normalized desired-vs-actual so Proxmox round-trip quirks don't read as drift. description's trailing newline is the first registered case; the registry takes more (boolean coercion, list ordering) as discovered. normDesc promoted out of cmd/felhom-agent/main.go to reconcile.NormDescription; the --selftest=task description round-trip now uses that shared helper (one source of truth for the quirk).
  • Plan engine (Plan, pure function) — computes the minimal benign action set (Start/Stop/SetConfig) for guests present in both desired and actual, with normalized comparison, deterministic vmid ordering, config-before-run-state. Skips provision (desired-absent-in-actual, slice 7) and destroy (actual-absent-in-desired, gated, slice 10); never writes a config it couldn't first read (SpecKnown). Disk (rootfs grow) intentionally not reconciled here.
  • Reconcile engine (Engine) — reads desired+actual, plans, dispatches each action onto the shared queue. Every Proxmox op handled per the mutate.go contract: non-empty UPID → WaitTask + assert exitstatus; empty UPID → clean synchronous success (slice-4 proven). Per-action failures are counted, not fatal (other guests still converge).
  • Operation journal (Journal) — durable fsync'd append-only JSONL mirroring authz.FileNonceStore: records each op's lifecycle (started → task_running → succeeded/failed) with its Proxmox task id (crash mid-op is detected and re-checkable on restart via InFlight()), plus an idempotency-key store (AlreadyApplied) so a one-shot op never re-runs across retries/restarts. Reconcile actions carry no idempotency key (convergent — must re-run on real drift).
• Daemon wiring (runDaemon) — reconcile runs alongside the hub loop on the poll cadence, sharing the per-guest queue. Journal path is a journal.log sibling of the nonce store. The daemon runs cleanly with no desired state and no signers (reconcile is a logged live no-op; a journal-open failure degrades to journal-less, never crashes).

Tests

• Serializer: same-guest serialized (max-concurrency 1, submit order preserved) and different-guests parallel (cross-waiting jobs both complete — would deadlock if not); error propagation; drain-pending-on-close; submit-after-close.
• Normalization: description round-trip; unknown-field identity; extensibility seam (synthetic boolean-coercion + list-ordering normalizers).
• Plan: run-state start/stop, spec drift (cores/memory), disk-not-reconciled, description-newline-not-drift, unmanaged fields, spec-unknown skips config keeps run-state, desired-absent skipped, combined ordering, empty-desired no-op, deterministic vmid order.
• Engine: empty-provider zero mutations; async start (WaitTask); synchronous SetConfig (no WaitTask); WaitTask failure + POST error counted failed; list error = pass failure.
• Journal: lifecycle latest-wins; in-flight survives restart; idempotency dedupe across restart; failed key not applied; torn-trailing-line skipped.
• Full module race-clean (go test -race) on the Linux build server; vet clean.

Not in this phase (Phase B)

• The benign/destructive classifier, the reversibility gate, and the signed-op consuming layer over internal/authz (doc 03 §4 / doc 04) — added next, in front of the queue's executor, landing v0.4.0.

v0.3.2 — SetConfig selftest extension (slice-4 pre-check) (2026-06-08)

The gate before slice 4: prove SetConfig works live under the scoped token before reconcile is built on it. Self-gated live run PASSED on demo-felhom/guest 9999.

Added

• Reversible SetConfig step appended to --selftest=task (cmd/felhom-agent/main.go, selftestSetConfig): read GuestConfig → write a description marker (felhom-selftest <RFC3339>) → verify it landed → restore the original value (or delete the key if it was absent) → verify the restore. Handles PVE's dual-mode SetConfig return per the mutate.go contract: empty UPID = synchronous success (printed synchronous); non-empty UPID = WaitTask + assert exitstatus=OK. The existing snapshot → rollback → delete-snapshot steps are unchanged. First live exercise of the VM.Config.* privilege cluster.
• normDesc / extraString helpers — extraString decodes a string-valued key from GuestConfig.Extra (raw JSON); normDesc strips the trailing newline PVE appends to description on read, so a written value round-trips equal.

Finding (live)

• The LXC description write returned synchronous (empty UPID) — PVE applied it inline, no task. The agent's dual-mode SetConfig modeling is correct: the empty-string path is real and must not be treated as an error.
• PVE appends a trailing \n to description on read (stored URL-encoded as %0A). A naive exact-match reconcile would see perpetual drift — slice-4 reconcile must normalize description comparisons (hence normDesc).

Ops

• Standing operator token (felhom-agent@pve!agent, privsep) rotated during this run (the prior secret was not retrievable); role + both user/token ACL rows re-confirmed at /. New secret stored out-of-band, not persisted to the repo. Guest 9999 left pristine (stopped, no description, no leftover snapshot). Version → 0.3.2.

Docs + live validation — no version bump (2026-06-08)

Changed

• Reflowed CLAUDE.md — removed hard mid-paragraph line wraps (prose, list items, blockquotes now single-line, soft-wrapped); code blocks and tables untouched; rendered output unchanged.
• Unified the REPORT/CHANGELOG convention in CLAUDE.md: CHANGELOG.md is the cumulative log (newest on top); REPORT.md is overwritten with the most-recent implementation/validation only. Added an explicit no-secrets rule (never write tokens/passwords/keys into committed files; reference them as stored out-of-band).

Added

• REPORT.md rewritten for the live --selftest=task validation on the demo host (demo-felhom): snapshot → rollback → delete-snapshot on guest 9999, each polled to exitstatus=OK under the felhom-agent@pve!agent privsep token (UPIDs name the token actor — privsep path genuinely exercised); 16-privilege FelhomAgent role + both user & token ACLs confirmed; --selftest=read clean. Closes the slice-1 "mutating ops unit-tested only" gap; WaitTask async foundation validated live → slice 4 unblocked. (Token secret stored out-of-band, not in the repo.)

v0.3.1 — slice-3 validation follow-ups (2026-06-08)

Changed

• Collector keeps the known run-status on a GuestConfig failure (internal/hub/collect.go): previously a per-guest config-read error forced status="unknown"; now the run-status from ListLXC is preserved (only the spec is dropped). An empty status is still normalized to unknown (wire value is always running|stopped|unknown). Test renamed to TestCollect_GuestConfigFailureKeepsStatusOmitsSpec and asserts the preserved running + nil spec.
• --selftest usage error string now reads (want read|task|hub).

Added

• Cross-repo contract fixture internal/hub/testdata/host-report.golden.json + TestHostReport_ContractMatchesGolden — compares the marshaled HostReport field-name sets (top level + host + guests[0]) against the golden, failing on any json-tag drift. The file is kept byte-identical with felhom-hub's copy (duplicated contract until a shared types module; revisit when slices 5/6 populate the empty collections). Version → 0.3.1.

v0.3.0 — hub client + host-report + first daemon loop (slice 3) (2026-06-08)

The agent's first daemon: a periodic read-only host-report POSTed to the hub (the heartbeat). No Proxmox mutations, no desired-state/signed-op consumption, no storage/backup collection yet — those are slices 4/5/6.

Added

• internal/hub package:
  • HostReport wire contract (report.go) shared field-for-field with the hub ingest: host metrics, guests (vmid + spec), cloudflared status, and the storage_targets/backups/restore_tests/pbs_snapshots/audit_tail collections defined but emitted empty (typed [], slices 5/6 fill them).
  • Collector (collect.go) builds the report from a read-only proxmoxReader (adapted to the real internal/proxmox surface — node held by the client, value returns, proxmox.Guest) + a CloudflaredProber. Partial-failure policy: a failed NodeStatus is a hard error (skip the POST); a failed per-guest GuestConfig degrades that guest to status="unknown" (spec omitted) but still sends; a cloudflared probe failure → "unknown", never fatal.
  • CloudflaredProber + SystemctlProber (systemctl is-active cloudflared; read-only — NOT a Privileged/root op; tunnel management is a later slice).
  • Client (client.go): POST /api/v1/host-report with Authorization: Bearer <key>, standard TLS (system roots or optional ca_file; verification always on). Typed *TransportError / *HTTPError; the bearer token never appears in any error.
  • Loop (loop.go): the daemon — immediate first report then tick; adopts the hub's poll_interval_seconds clamped to [60,3600]; resilient (a collect/report error is logged and the loop continues); clean shutdown on context cancel.
  • ControlEnvelope: only poll_interval_seconds is acted on; blocked / desired_generation / has_signed_ops are parsed-but-ignored (logged at most) pending reconcile (slice 4).
• Config: HubConfig (url/host_id/api_key/poll_seconds/timeout_seconds/ca_file), FELHOM_AGENT_HUB_* env overlay, HubConfig.Validate() (mode-aware — proxmox-only --selftest=read|task still runs without hub config), WithDefaults(), and Redacted() now also blanks the hub key. configs/agent.example.json gains hub (and authz) blocks.
• cmd/felhom-agent: the no---selftest mode is now the daemon (poll loop); added --selftest=hub (one collect+report, prints the report + envelope). Version 0.2.0 → 0.3.0.

Tests

• Report serialization (field names; empty collections are [] not null; spec omitted when unknown); client (Bearer header, non-2xx→*HTTPError, transport→*TransportError, token never in error); collector (host mapping, guest spec, per-guest failure degrades-but-still-reports, NodeStatus hard error, cloudflared error→unknown); loop (immediate first report, continuation after an injected error, interval adoption + clamp); config (hub validate/redact/env).

Notes

• internal/proxmox and internal/authz were not touched — no new proxmox surface was needed (ListLXC already exposes status/maxmem/maxdisk; GuestConfig exposes cores). The task's proxmoxReader sketch (node-arg/pointer/LXC) was adapted to the real exports as instructed.
• Defined-but-empty this slice: storage_targets, backups, restore_tests, pbs_snapshots, audit_tail (slices 5/6). Parsed-but-ignored: the envelope's blocked/desired_generation/has_signed_ops (slice 4).

v0.2.0 — authz signed-op verifier (slice 2) (2026-06-08)

Production form of the Phase-4 signing primitive: a key-type-agnostic SSHSIG verifier for operator-signed destructive ops, with the full anti-replay/ authorization pipeline and a durable, crash-safe nonce store. What slice 4 (reconcile) will call to gate destructive desired-state deltas. No hub, no signing CLI, no reconcile loop.

Added

• internal/authz — Verifier: New(signers, store, hostID) + Verify(blob, sigArmored) (*VerifiedOp, error). Runs the LOCKED pipeline (order is load-bearing): parse armor → namespace → parse pubkey → allow-list (by key material, pub.Marshal() equality, not key_id) → crypto verify (over the raw received bytes, never re-canonicalized) → parse blob → target → time window → nonce recorded LAST. Each post-crypto stage rejects even with a valid signature.
• SSHSIG framing (sshsig.go) via golang.org/x/crypto/ssh — pem.Decode → strip 6-byte magic → ssh.Unmarshal → ssh.ParsePublicKey → recompute signed data with the named hash → pub.Verify (dispatches on key algorithm). No hand-rolled crypto. Key-type-agnostic: ed25519 / sk-ssh-ed25519 (FIDO2) / rsa / ecdsa via the one path.
• Fixed namespace felhom-op-v1 (package constant, never caller-supplied).
• OpBlob (corrected host_id/guest_id json tags) + VerifiedOp (op, host/guest, params, key_id, matched signer). key_id is advisory/audit only — never an authz input.
• Typed errors: ErrMalformed, ErrNamespace, ErrUnknownSigner, ErrBadSignature, ErrTarget, ErrExpired, ErrNotYetValid, ErrReplay (errors.Is-friendly).
• NonceStore + two impls: MemoryNonceStore (tests) and FileNonceStore — durable, crash-safe (fsync'd append log, replayed into an index on open, periodic compaction, expiry-only pruning). A nonce is fsync'd to disk before SeenOrRecord returns false; replay protection survives restart; I/O failure fails safe (reports seen=true). Target generalization: host_id matched strictly, guest_id surfaced for the caller to route.
• Config: AuthzConfig (nonce-store path + pinned operator signers tagged operational/recovery with a key_id, as authorized_keys lines).
• Version 0.2.0.

Tests

• Real OpenSSH interop via a committed ssh-keygen -Y sign vector (hermetic CI); per-stage rejection (each with an otherwise-valid sig); the headline invalid-sig-does-not-burn-the-nonce invariant; replay; persistence across restart; synthetic sk-ssh-ed25519 through the unchanged path; byte-exactness (a re-serialized blob fails crypto — not re-canonicalized).

Notes / corrections to the Phase-4 reference

• §7's Target lacked json tags (host_id/guest_id) — fixed.
• The doc paired "Go 1.24.4 / x/crypto v0.52.0", but v0.52.0 declares go 1.25.0 and does not build on Go 1.24. Resolved by upgrading the build server to go1.26.0 (backward-compatible; felhom-controller/hub unaffected); the module is go 1.25.0 on x/crypto v0.52.0.
• Free function → constructed Verifier; returns the full VerifiedOp; typed errors; clock-skew tolerance added; durable nonce store is the net-new work.
• Shared-contract dependency flagged (not built): the hub and the felhom-sign CLI must emit byte-identical canonical JSON or signatures won't verify; a shared canonicalizer both import would be the right home.

v0.1.0 — Scaffold + proxmox interaction layer (slice 1) (2026-06-08)

First slice: stand up the host-agent project and its foundation — the typed Proxmox interaction layer every other module will call. No reconcile loop, hub client, signing, or storage/backup orchestration yet (later slices).

Added

• Project scaffold: module gitea.dooplex.hu/admin/felhom-agent, binary felhom-agent (cmd/felhom-agent/), Go 1.24, zero external dependencies (pure stdlib). --version flag; version var overridable via -ldflags "-X main.version=<v>".
• internal/proxmox — API backend (Client): hand-rolled REST client over https://<host>:8006/api2/json with PVEAPIToken auth. Typed read ops (Version, Nodes, NodeStatus, ListLXC, GuestStatus, GuestConfig, ListStorage, NodeStorage, StorageContent) and async mutating ops returning a UPID (RestoreLXC — the primary create path, Vzdump, Snapshot, Rollback, DeleteSnapshot, SetConfig, Start, Stop).
• WaitTask: polls GET /nodes/{node}/tasks/{upid}/status until stopped, then asserts exitstatus == "OK" (authorization can surface at task execution, not the POST — phase1-2 §1.3). Exponential backoff (1s→5s cap), context cancellation + timeout. *APIError parses the offending privilege from a 403; *TaskError parses it from a failed task exitstatus + log tail.
• internal/proxmox — fenced root-CLI backend (Privileged): limited to the three proven OS-root exceptions only — CreateGoldenLXC (keyctl pct create), MountUSBByUUID, SMART, Sensors; each cites why it can't be the API. Fence is structural (Client never shells out, Privileged never makes an HTTP call) and asserted in tests.
• TLS trust: SHA-256 leaf-cert pinning (the host serves a self-signed cert) or a CA file; an explicitly-named insecure_skip_verify that is off by default. No blanket verification disable.
• internal/config: JSON config file + FELHOM_AGENT_* env overrides; the token secret is never logged (Redacted()).
• internal/log: slog setup (text, stderr, configurable level).
• cmd/felhom-agent --selftest: read-only health report against a live host (version/nodes/status/guests/storage); --selftest=task --vmid N exercises WaitTask on a reversible snapshot→rollback→delete op (gated; default selftest mutates nothing).
• Tests: unit tests with a mock HTTP transport + mock runner (UPID parse, WaitTask running→OK / failed-403 / timeout / ctx-cancel, 403→privilege error, response decoding against shapes captured live from demo-felhom, config redaction, and the API-vs-root routing fence).

Notes

• Types are grounded in the spike findings (felhom.eu/documentation/proxmox-platform.md, tests/phase{0,1-2,3}-findings.md) and the exact JSON shapes captured live from demo-felhom (PVE 9.2.2).
• Verified: go build/vet/test green on Go 1.24.4 (build server) and a live read-only --selftest against the demo host with TLS fingerprint pinning.
• The 16-privilege FelhomAgent role + privsep token (role on both user and token) is provisioned out-of-band; the agent only consumes the token.