{"surfaces": [{"surface": "host:disk/", "observation": "healthy", "method": "local_artifact", "summary": "755.7GB free, not shrinking", "source": "statvfs:/", "read_at": "2026-09-27T22:16:18.178001+00:00", "detail": {"free_bytes": 811478913024, "free_gb": 755.75, "total_gb": 755.75, "pct_free": 100.0, "floor_gb": 5.0, "samples": 51, "slope_gb_per_day": 0.0, "runway_days": null}, "held_since": "2026-09-27T22:16:18.178001+00:00", "held_seconds": 0.0}, {"surface": "collector:kevin-mac", "observation": "healthy", "method": "local_artifact", "summary": "collector kevin-mac last reported 532s ago, inside its declared 1800s deadline", "source": "verify:collector_liveness", "read_at": "2026-09-27T22:16:16.862665+00:00", "detail": {"liveness": "live", "cadence_seconds": 900.0, "silent_after_seconds": 1800.0, "last_report_at": "2026-09-27T22:07:24.652291+00:00", "silent_for_seconds": 532.2, "withheld": ["collector_id", "declared_surfaces"]}, "held_since": "2026-09-27T22:16:16.862665+00:00", "held_seconds": 0.0}, {"surface": "host:mac/disk", "observation": "healthy", "method": "reported", "summary": "83.4GB free, 106 days of runway", "source": "statvfs:/", "read_at": "2026-09-27T22:07:24.380561+00:00", "detail": {"floor_gb": 5.0, "free_bytes": 89561362432, "pct_free": 36.54, "free_gb": 83.41, "runway_days": 105.6, "slope_gb_per_day": -0.743, "total_gb": 228.27, "samples": 2011, "withheld": ["collector_id", "received_at", "reported_method", "wire_row_id"]}, "held_since": "2026-09-27T09:53:38.343527+00:00", "held_seconds": 44026.0, "reported_by": "kevin-mac"}, {"surface": "cron:morning-brief", "observation": "healthy", "method": "reported", "summary": "brief sent 11.1h ago", "source": "brief-send-log.jsonl", "read_at": "2026-09-27T22:07:24.380939+00:00", "detail": {"row_count": 48, "window_hours": 30.0, "last_send_at": "2026-09-27T11:01:25.939225+00:00", "age_hours": 11.1, "withheld": ["collector_id", "received_at", "reported_method", "wire_row_id"]}, "held_since": "2026-09-27T09:53:38.344008+00:00", "held_seconds": 44026.0, "reported_by": "kevin-mac"}, {"surface": "cron:gcal-sync", "observation": "healthy", "method": "reported", "summary": "last success 0.1h ago", "source": "gcal-sync-heartbeat.json", "read_at": "2026-09-27T22:07:24.380997+00:00", "detail": {"window_hours": 1.0, "last_success": "2026-09-27T22:00:01.004823+00:00", "age_hours": 0.12, "withheld": ["collector_id", "counts", "received_at", "reported_method", "skipped", "wire_row_id"]}, "held_since": "2026-09-27T09:53:38.344453+00:00", "held_seconds": 44026.0, "reported_by": "kevin-mac"}, {"surface": "backup:baserow", "observation": "healthy", "method": "reported", "summary": "backup 14.1h old (31 retained)", "source": "infra-baserow-1:/baserow/backups", "read_at": "2026-09-27T22:07:24.519327+00:00", "detail": {"window_hours": 26.0, "backup_count": 31, "age_hours": 14.12, "newest_at": "2026-09-27T08:00:00+00:00", "newest": "baserow_backup_20260927_030000.tar.gz", "withheld": ["collector_id", "received_at", "reported_method", "wire_row_id"]}, "held_since": "2026-09-27T09:53:38.421984+00:00", "held_seconds": 44026.1, "reported_by": "kevin-mac"}, {"surface": "cron:comms-freshness", "observation": "healthy", "method": "reported", "summary": "last success 0.0h ago", "source": "comms-freshness-run.json", "read_at": "2026-09-27T22:07:24.519485+00:00", "detail": {"window_hours": 1.5, "last_success": "2026-09-27T22:07:07.863952+00:00", "age_hours": 0.0, "invoked_by": "interactive", "alarm": true, "withheld": ["collector_id", "received_at", "reported_method", "stale", "wire_row_id"]}, "held_since": "2026-09-27T09:53:38.422596+00:00", "held_seconds": 44026.1, "reported_by": "kevin-mac"}, {"surface": "service:staging-queue", "observation": "healthy", "method": "reported", "summary": "last success 0.0h ago", "source": "staging-queue-heartbeat.json", "read_at": "2026-09-27T22:07:24.519550+00:00", "detail": {"http_code": 200, "last_success": "2026-09-27T22:06:58+00:00", 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"last_success": "2026-09-27T22:07:00.018416+00:00", "age_hours": 0.01, "withheld": ["collector_id", "hb_source", "received_at", "reported_method", "row", "wire_row_id"]}, "held_since": "2026-09-27T09:53:38.423469+00:00", "held_seconds": 44026.1, "reported_by": "kevin-mac"}, {"surface": "cron:digest-hackfw", "observation": "healthy", "method": "reported", "summary": "last success 0.1h ago", "source": "index.html.heartbeat.json", "read_at": "2026-09-27T22:07:24.519696+00:00", "detail": {"window_hours": 1.0, "brand": "hackfw", "age_hours": 0.12, "last_success": "2026-09-27T22:00:00.795399+00:00", "bytes": 42714, "changed": false, "withheld": ["collector_id", "received_at", "reported_method", "wire_row_id"]}, "held_since": "2026-09-27T09:53:38.423864+00:00", "held_seconds": 44026.1, "reported_by": "kevin-mac"}, {"surface": "cron:digest-tmb", "observation": "healthy", "method": "reported", "summary": "last success 0.1h ago", "source": "tmb-index.html.heartbeat.json", "read_at": 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