Host report keeps the last backup across a restart; Secure Boot meta-package leaves the Proxmox lane

Found in the 2026-10-09 kernel-night read-back:
- demo-felhom: the kernel step restarted the host 4 minutes after the night
  backup; the in-memory backup list was empty after the restart, so the hub
  alarmed "host tier: newest backup is 48h old". The report now adds R-894's
  saved newest success per tier (one shared instance).
- demo-hp: proxmox-secure-boot-support pulled shim-signed-common into the
  ring-0 Proxmox plan; the step was refused R6 and the kernel step skipped.
  It joins HOST_SLOW_RE with shim and GRUB.

Red-proved: TestCollectBackups_SavedSuccessSurvivesARestart,
TestR894_LastKnownBackupsIsWiredIntoTheDaemon,
test_ring0_pending_pve_leaves_the_secure_boot_meta_out.

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

internal/backup/backup_state.go

@@ -103,6 +103,29 @@ func (s *BackupSuccessState) LastKnownSuccess(target string, vmid int) (time.Tim
 	return e.at, ok
 }
 
+// KnownBackupSuccesses returns every saved success as a host-report record (the collector's
+// KnownBackupReporter, so the hub keeps its evidence across a restart). Only the tier, guest and start
+// time are known; the archive name is not saved and stays empty. Sorted for a stable report.
+func (s *BackupSuccessState) KnownBackupSuccesses() []hub.Backup {
+	if s == nil {
+		return nil
+	}
+	s.mu.Lock()
+	defer s.mu.Unlock()
+	out := make([]hub.Backup, 0, len(s.last))
+	for _, e := range s.last {
+		out = append(out, hub.Backup{TargetID: e.target, VMID: e.vmid, Success: true, CrashConsistent: true,
+			StartedAt: e.at.Format(time.RFC3339), UncoveredVolumes: []string{}})
+	}
+	sort.Slice(out, func(i, j int) bool {
+		if out[i].TargetID != out[j].TargetID {
+			return out[i].TargetID < out[j].TargetID
+		}
+		return out[i].VMID < out[j].VMID
+	})
+	return out
+}
+
 func (s *BackupSuccessState) saveLocked() error {
 	entries := make([]backupSuccessJSON, 0, len(s.last))
 	for _, e := range s.last {

internal/backup/backup_state_test.go

@@ -57,3 +57,20 @@ func TestBackupSuccessState_CorruptFileIsEmpty(t *testing.T) {
 		t.Fatal("a corrupt file must read as nothing known")
 	}
 }
+
+// The saved successes come back as host-report records: success, tier, guest, start time (R-894 → the
+// host report, 2026-10-09). A new state read from the same file gives the same records (the restart case).
+func TestBackupSuccessState_KnownBackupSuccessesSurviveAReopen(t *testing.T) {
+	path := filepath.Join(t.TempDir(), "backup-success-state.json")
+	s := NewBackupSuccessState(path)
+	if err := s.RecordBackupSuccess("felhom-backup", hub.Backup{VMID: 9201, Success: true, StartedAt: "2026-10-09T02:40:16Z"}); err != nil {
+		t.Fatal(err)
+	}
+	got := NewBackupSuccessState(path).KnownBackupSuccesses()
+	if len(got) != 1 || !got[0].Success || got[0].TargetID != "felhom-backup" || got[0].VMID != 9201 || got[0].StartedAt != "2026-10-09T02:40:16Z" {
+		t.Fatalf("got %+v", got)
+	}
+	if got[0].UncoveredVolumes == nil {
+		t.Fatal("uncovered_volumes must marshal as [], not null")
+	}
+}

internal/hub/collect.go

@@ -66,6 +66,13 @@ type ProvenRestoreTestReporter interface {
 	ProvenRestoreTests(ctx context.Context) []RestoreTest
 }
 
+// KnownBackupReporter is the newest SUCCESSFUL backup per tier and guest kept on disk (R-894's
+// backup-success-state.json). collectBackups folds it into the report so a restart does not erase the
+// hub's evidence of a backup that ran minutes before it (the kernel-night shape, 2026-10-09).
+type KnownBackupReporter interface {
+	KnownBackupSuccesses() []Backup
+}
+
 // PBSReporter is the slice-6-Phase-B seam the pbs verify loop plugs into (same pattern).
 // Returns the agent's latest-known PBS snapshot inventory + verify-state. nil → empty.
 type PBSReporter interface {
@@ -105,6 +112,7 @@ type Collector struct {
 	backups          BackupReporter
 	restoreTests     RestoreTestReporter
 	provenTests      ProvenRestoreTestReporter
+	knownBackups     KnownBackupReporter // R-894 file → host report after a restart (nil → in-memory only)
 	pbs              PBSReporter
 	temp             TempReader                                    // slice 9: host CPU/chassis temp (nil-safe → nil temp)
 	capProbe         func(ctx context.Context) []capability.Status // v0.44.0: privileged-capability self-check (nil → empty)
@@ -576,14 +584,50 @@ func (c *Collector) collectStorage(ctx context.Context) []StorageTarget {
 // collectBackups / collectRestoreTests read the agent's latest backup + restore-test state
 // via the seams. Best-effort: a nil reporter or nil slice degrades to an empty (non-nil)
 // list so the collection always marshals as [].
+//
+// The saved successes (SetKnownBackupReporter) are added for each tier and guest the in-memory list has
+// no success for at or after the saved time. Why: the in-memory list is empty after an agent restart,
+// and the hub's backup-freshness check reads only what the reports carried. Measured 2026-10-09 on
+// demo-felhom: the night backup landed 02:40 UTC, the kernel step restarted the host at 02:44, no report
+// fell in between, so two kernel nights in a row left no trace and the hub alarmed „newest backup is 48h
+// old" at 03:00. Only SUCCESSES are saved, so a failure is never hidden and never invented.
+// Pinned by TestCollectBackups_SavedSuccessSurvivesARestart.
 func (c *Collector) collectBackups(ctx context.Context) []Backup {
-	if c.backups == nil {
-		return []Backup{}
+	out := []Backup{}
+	if c.backups != nil {
+		if b := c.backups.Backups(ctx); b != nil {
+			out = append(out, b...)
+		}
 	}
-	if b := c.backups.Backups(ctx); b != nil {
-		return b
+	if c.knownBackups == nil {
+		return out
 	}
-	return []Backup{}
+	for _, k := range c.knownBackups.KnownBackupSuccesses() {
+		kt, err := time.Parse(time.RFC3339, k.StartedAt)
+		if err != nil {
+			continue
+		}
+		covered := false
+		for _, b := range out {
+			if !b.Success || b.TargetID != k.TargetID || b.VMID != k.VMID {
+				continue
+			}
+			if bt, err := time.Parse(time.RFC3339, b.StartedAt); err == nil && !bt.Before(kt) {
+				covered = true
+				break
+			}
+		}
+		if !covered {
+			out = append(out, k)
+		}
+	}
+	return out
+}
+
+// SetKnownBackupReporter wires the R-894 saved successes into the host report (nil-safe → in-memory only).
+func (c *Collector) SetKnownBackupReporter(r KnownBackupReporter) *Collector {
+	c.knownBackups = r
+	return c
 }
 
 // collectRestoreTests merges the in-memory result with the PERSISTED per-tier proofs (R-189).

internal/hub/collect_knownbackups_test.go

@@ -0,0 +1,62 @@
+package hub
+
+import (
+	"context"
+	"testing"
+)
+
+type fakeMemBackups []Backup
+
+func (f fakeMemBackups) Backups(context.Context) []Backup { return f }
+
+type fakeKnownBackups []Backup
+
+func (f fakeKnownBackups) KnownBackupSuccesses() []Backup { return f }
+
+// The consequence, not the mechanism: after a restart (empty in-memory list) the host report still carries
+// the night's backup, so the hub's freshness check sees it. Measured 2026-10-09 on demo-felhom: without this
+// the report carried backups: [] and the hub alarmed „newest backup is 48h old" an hour after a good backup.
+// RED-PROOF: return before the saved-success loop in collectBackups → the first case reports nothing → fails.
+func TestCollectBackups_SavedSuccessSurvivesARestart(t *testing.T) {
+	saved := Backup{TargetID: "felhom-backup", VMID: 9201, Success: true, StartedAt: "2026-10-09T02:40:16Z"}
+
+	t.Run("restart: memory empty, the saved success is reported", func(t *testing.T) {
+		c := &Collector{backups: fakeMemBackups(nil), knownBackups: fakeKnownBackups{saved}}
+		got := c.collectBackups(context.Background())
+		if len(got) != 1 || got[0].StartedAt != saved.StartedAt || !got[0].Success || got[0].TargetID != "felhom-backup" {
+			t.Fatalf("want the saved success, got %+v", got)
+		}
+	})
+
+	t.Run("memory holds the same or a newer success: no second entry", func(t *testing.T) {
+		mem := Backup{TargetID: "felhom-backup", VMID: 9201, Success: true, StartedAt: "2026-10-09T02:40:16Z", Archive: "a"}
+		c := &Collector{backups: fakeMemBackups{mem}, knownBackups: fakeKnownBackups{saved}}
+		if got := c.collectBackups(context.Background()); len(got) != 1 || got[0].Archive != "a" {
+			t.Fatalf("want only the in-memory record, got %+v", got)
+		}
+	})
+
+	t.Run("a newer FAILURE in memory never hides the saved success, and is kept", func(t *testing.T) {
+		fail := Backup{TargetID: "felhom-backup", VMID: 9201, Success: false, StartedAt: "2026-10-10T02:40:00Z", Error: "x"}
+		c := &Collector{backups: fakeMemBackups{fail}, knownBackups: fakeKnownBackups{saved}}
+		got := c.collectBackups(context.Background())
+		if len(got) != 2 || got[0].Success || !got[1].Success {
+			t.Fatalf("want the failure and the saved success, got %+v", got)
+		}
+	})
+
+	t.Run("another tier's success does not cover this tier", func(t *testing.T) {
+		other := Backup{TargetID: "felhom-pbs", VMID: 9201, Success: true, StartedAt: "2026-10-10T00:00:00Z"}
+		c := &Collector{backups: fakeMemBackups{other}, knownBackups: fakeKnownBackups{saved}}
+		if got := c.collectBackups(context.Background()); len(got) != 2 {
+			t.Fatalf("want both tiers, got %+v", got)
+		}
+	})
+
+	t.Run("no saved state wired: the in-memory list as before, never nil", func(t *testing.T) {
+		c := &Collector{}
+		if got := c.collectBackups(context.Background()); got == nil || len(got) != 0 {
+			t.Fatalf("want an empty non-nil list, got %#v", got)
+		}
+	})
+}