{"surfaces": [{"surface": "host:disk/", "observation": "healthy", "method": "local_artifact", "summary": "755.7GB free, 461993588 days of runway", "source": "statvfs:/", "read_at": "2026-09-26T08:23:22.381221+00:00", "detail": {"free_bytes": 811478810624, "free_gb": 755.75, "total_gb": 755.75, "pct_free": 100.0, "floor_gb": 5.0, "samples": 1396, "slope_gb_per_day": -0.0, "runway_days": 461993587.8}, "held_since": "2026-09-26T08:23:22.381221+00:00", "held_seconds": 0.0}, {"surface": "collector:kevin-mac", "observation": "healthy", "method": "local_artifact", "summary": "collector kevin-mac last reported 378s ago, inside its declared 1800s deadline", "source": "verify:collector_liveness", "read_at": "2026-09-26T08:23:20.881761+00:00", "detail": {"liveness": "live", "cadence_seconds": 900.0, "silent_after_seconds": 1800.0, "last_report_at": "2026-09-26T08:17:03.343461+00:00", "silent_for_seconds": 377.5, "withheld": ["collector_id", "declared_surfaces"]}, "held_since": "2026-09-26T08:23:20.881761+00:00", "held_seconds": 0.0}, {"surface": "host:mac/disk", "observation": "fault", "method": "reported", "summary": "14.1GB free but losing 0.87GB/day: hits the floor in 10.5 days", "source": "statvfs:/", "read_at": "2026-09-26T08:17:03.199955+00:00", "detail": {"pct_free": 6.18, "floor_gb": 5.0, "runway_days": 10.5, "free_gb": 14.12, "free_bytes": 15156645888, "slope_gb_per_day": -0.87, "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": 34341.3, "reported_by": "kevin-mac"}, {"surface": "cron:morning-brief", "observation": "healthy", "method": "reported", "summary": "brief sent 21.3h ago", "source": "brief-send-log.jsonl", "read_at": "2026-09-26T08:17:03.203700+00:00", "detail": {"last_send_at": "2026-09-25T11:01:08.923796+00:00", "row_count": 46, "age_hours": 21.27, "window_hours": 30.0, "withheld": ["collector_id", "received_at", "reported_method", "wire_row_id"]}, "held_since": "2026-09-25T19:58:50.961213+00:00", "held_seconds": 44292.2, "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": "2026-09-26T08:17:03.204071+00:00", "detail": {"last_success": "2026-09-26T08:10:01.169656+00:00", "age_hours": 0.12, "window_hours": 1.0, "withheld": ["collector_id", "counts", "received_at", "reported_method", "skipped", "wire_row_id"]}, "held_since": "2026-09-25T19:58:50.990632+00:00", "held_seconds": 44292.2, "reported_by": "kevin-mac"}, {"surface": "backup:baserow", "observation": "healthy", "method": "reported", "summary": "backup 0.3h old (31 retained)", "source": "infra-baserow-1:/baserow/backups", "read_at": "2026-09-26T08:17:03.258113+00:00", "detail": {"newest_at": "2026-09-26T08:00:00+00:00", "age_hours": 0.28, "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": "2026-09-25T19:58:51.444771+00:00", "held_seconds": 44291.8, "reported_by": "kevin-mac"}, {"surface": "cron:comms-freshness", "observation": "healthy", "method": "reported", "summary": "last success 0.3h ago", "source": "comms-freshness-run.json", "read_at": "2026-09-26T08:17:03.258668+00:00", "detail": {"invoked_by": "interactive", "alarm": true, "last_success": "2026-09-26T07:58:11.128616+00:00", "age_hours": 0.31, "window_hours": 1.5, "withheld": ["collector_id", "received_at", "reported_method", "stale", "wire_row_id"]}, "held_since": "2026-09-25T19:58:51.460984+00:00", "held_seconds": 44291.8, "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": "2026-09-26T08:17:03.258978+00:00", "detail": {"http_code": 200, "last_success": "2026-09-26T08:13:25+00:00", "age_hours": 0.06, "window_hours": 0.5, "withheld": ["collector_id", "probe", "received_at", "reported_method", "wire_row_id"]}, "held_since": "2026-09-25T19:58:51.466342+00:00", "held_seconds": 44291.8, "reported_by": "kevin-mac"}, {"surface": "cron:kai-cadence", "observation": "healthy", "method": "reported", "summary": "last success 10.0h ago", "source": "kai-cadence-heartbeat.json", "read_at": "2026-09-26T08:17:03.259463+00:00", "detail": {"invoked_by": "cadence", "last_success": "2026-09-25T22:15:08.602707+00:00", "age_hours": 10.03, "outcome": "posted", "window_hours": 26.0, "withheld": ["collector_id", "received_at", "reported_method", "wire_row_id"]}, "held_since": "2026-09-25T19:58:51.478443+00:00", "held_seconds": 44291.8, "reported_by": "kevin-mac"}, {"surface": "cron:devpost", "observation": "healthy", "method": "reported", "summary": "last success 3.7h ago", "source": "devpost-heartbeat.json", "read_at": "2026-09-26T08:17:03.259787+00:00", "detail": {"last_success": "2026-09-26T04:33:20.605551+00:00", "age_hours": 3.73, "window_hours": 26.0, "withheld": ["collector_id", "hb_source", "received_at", "reported_method", "row", "wire_row_id"]}, "held_since": "2026-09-25T19:58:51.491313+00:00", "held_seconds": 44291.8, "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": "2026-09-26T08:17:03.260178+00:00", "detail": {"brand": "hackfw", "changed": false, "last_success": "2026-09-26T08:10:00.959197+00:00", "bytes": 42714, "age_hours": 0.12, "window_hours": 1.0, "withheld": ["collector_id", "received_at", "reported_method", "wire_row_id"]}, "held_since": "2026-09-25T19:58:51.506100+00:00", "held_seconds": 44291.8, "reported_by": "kevin-mac"}, {"surface": "cron:digest-tmb", "observation": "healthy", "method": "reported", "summary": "last success 0.1h 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