{"surfaces": [{"surface": "host:disk/", "observation": "healthy", "method": "local_artifact", "summary": "755.7GB free, 410935241 days of runway", "source": "statvfs:/", "read_at": "2026-09-26T10:10:42.851634+00:00", "detail": {"free_bytes": 811478810624, "free_gb": 755.75, "total_gb": 755.75, "pct_free": 100.0, "floor_gb": 5.0, "samples": 1412, "slope_gb_per_day": -0.0, "runway_days": 410935241.0}, "held_since": "2026-09-26T10:10:42.851634+00:00", "held_seconds": 0.0}, {"surface": "collector:kevin-mac", "observation": "healthy", "method": "local_artifact", "summary": "collector kevin-mac last reported 493s ago, inside its declared 1800s deadline", "source": "verify:collector_liveness", "read_at": "2026-09-26T10:10:41.571873+00:00", "detail": {"liveness": "live", "cadence_seconds": 900.0, "silent_after_seconds": 1800.0, "last_report_at": "2026-09-26T10:02:28.815223+00:00", "silent_for_seconds": 492.8, "withheld": ["collector_id", "declared_surfaces"]}, "held_since": "2026-09-26T10:10:41.571873+00:00", "held_seconds": 0.0}, {"surface": "host:mac/disk", "observation": "fault", "method": "reported", "summary": "14.1GB free but losing 0.88GB/day: hits the floor in 10.3 days", "source": "statvfs:/", "read_at": "2026-09-26T10:02:28.596568+00:00", "detail": {"pct_free": 6.17, "floor_gb": 5.0, "runway_days": 10.3, "free_gb": 14.09, "free_bytes": 15130644480, "slope_gb_per_day": -0.883, "total_gb": 228.27, "samples": 2011, "withheld": ["collector_id", "received_at", "reported_method", "wire_row_id"]}, "held_since": "2026-09-25T22:44:41.887490+00:00", "held_seconds": 40666.7, "reported_by": "kevin-mac"}, {"surface": "cron:morning-brief", "observation": "healthy", "method": "reported", "summary": "brief sent 23.0h ago", "source": "brief-send-log.jsonl", "read_at": "2026-09-26T10:02:28.597142+00:00", "detail": {"last_send_at": "2026-09-25T11:01:08.923796+00:00", "row_count": 46, "age_hours": 23.02, "window_hours": 30.0, "withheld": ["collector_id", "received_at", "reported_method", "wire_row_id"]}, "held_since": "2026-09-25T21:44:19.266346+00:00", "held_seconds": 44289.3, "reported_by": "kevin-mac"}, {"surface": "cron:gcal-sync", "observation": "healthy", "method": "reported", "summary": "last success 0.0h ago", "source": "gcal-sync-heartbeat.json", "read_at": "2026-09-26T10:02:28.597535+00:00", "detail": {"last_success": "2026-09-26T10:00:01.085518+00:00", "age_hours": 0.04, "window_hours": 1.0, "withheld": ["collector_id", "counts", "received_at", "reported_method", "skipped", "wire_row_id"]}, "held_since": "2026-09-25T21:44:19.266732+00:00", "held_seconds": 44289.3, "reported_by": "kevin-mac"}, {"surface": "backup:baserow", "observation": "healthy", "method": "reported", "summary": "backup 2.0h old (31 retained)", "source": "infra-baserow-1:/baserow/backups", "read_at": "2026-09-26T10:02:28.689646+00:00", "detail": {"newest_at": "2026-09-26T08:00:00+00:00", "age_hours": 2.04, "newest": "baserow_backup_20260926_030000.tar.gz", "backup_count": 31, "window_hours": 26.0, "withheld": ["collector_id", "received_at", "reported_method", "wire_row_id"]}, "held_since": "2026-09-25T21:44:19.366942+00:00", "held_seconds": 44289.3, "reported_by": "kevin-mac"}, {"surface": "cron:comms-freshness", "observation": "healthy", "method": "reported", "summary": "last success 0.1h ago", "source": "comms-freshness-run.json", "read_at": "2026-09-26T10:02:28.690262+00:00", "detail": {"invoked_by": "interactive", "alarm": true, "last_success": "2026-09-26T09:58:11.964018+00:00", "age_hours": 0.07, "window_hours": 1.5, "withheld": ["collector_id", "received_at", "reported_method", "stale", "wire_row_id"]}, "held_since": "2026-09-25T21:44:19.367586+00:00", "held_seconds": 44289.3, "reported_by": "kevin-mac"}, {"surface": "service:staging-queue", "observation": "healthy", "method": "reported", "summary": "last success 0.1h ago", "source": "staging-queue-heartbeat.json", "read_at": "2026-09-26T10:02:28.690606+00:00", "detail": {"http_code": 200, "last_success": "2026-09-26T09:58:27+00:00", "age_hours": 0.07, "window_hours": 0.5, "withheld": ["collector_id", "probe", "received_at", "reported_method", "wire_row_id"]}, "held_since": "2026-09-25T21:44:19.367779+00:00", "held_seconds": 44289.3, "reported_by": "kevin-mac"}, {"surface": "cron:kai-cadence", "observation": "healthy", "method": "reported", "summary": "last success 11.8h ago", "source": "kai-cadence-heartbeat.json", "read_at": "2026-09-26T10:02:28.691132+00:00", "detail": {"invoked_by": "cadence", "last_success": "2026-09-25T22:15:08.602707+00:00", "age_hours": 11.79, "outcome": "posted", "window_hours": 26.0, "withheld": ["collector_id", "received_at", "reported_method", "wire_row_id"]}, "held_since": "2026-09-25T21:44:19.368114+00:00", "held_seconds": 44289.3, "reported_by": "kevin-mac"}, {"surface": "cron:devpost", "observation": "healthy", "method": "reported", "summary": "last success 5.5h ago", "source": "devpost-heartbeat.json", "read_at": "2026-09-26T10:02:28.691525+00:00", "detail": {"last_success": "2026-09-26T04:33:20.605551+00:00", "age_hours": 5.49, "window_hours": 26.0, "withheld": ["collector_id", "hb_source", "received_at", "reported_method", "row", "wire_row_id"]}, "held_since": "2026-09-25T21:44:19.368406+00:00", "held_seconds": 44289.3, "reported_by": "kevin-mac"}, {"surface": "cron:digest-hackfw", "observation": "healthy", "method": "reported", "summary": "last success 0.0h ago", "source": "index.html.heartbeat.json", "read_at": "2026-09-26T10:02:28.691994+00:00", "detail": {"brand": "hackfw", "changed": false, "last_success": "2026-09-26T10:00:00.893410+00:00", "bytes": 42714, "age_hours": 0.04, "window_hours": 1.0, "withheld": ["collector_id", "received_at", "reported_method", "wire_row_id"]}, "held_since": "2026-09-25T21:44:19.368774+00:00", "held_seconds": 44289.3, "reported_by": "kevin-mac"}, {"surface": "cron:digest-tmb", "observation": "healthy", "method": "reported", "summary": "last success 0.0h 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