{"surfaces": [{"surface": "host:disk/", "observation": "healthy", "method": "local_artifact", "summary": "755.7GB free, 274543817 days of runway", "source": "statvfs:/", "read_at": "2026-09-27T12:17:33.103858+00:00", "detail": {"free_bytes": 811478810624, "free_gb": 755.75, "total_gb": 755.75, "pct_free": 100.0, "floor_gb": 5.0, "samples": 169, "slope_gb_per_day": -0.0, "runway_days": 274543816.5}, "held_since": "2026-09-27T12:17:33.103858+00:00", "held_seconds": 0.0}, {"surface": "collector:kevin-mac", "observation": "healthy", "method": "local_artifact", "summary": "collector kevin-mac last reported 500s ago, inside its declared 1800s deadline", "source": "verify:collector_liveness", "read_at": "2026-09-27T12:17:31.699485+00:00", "detail": {"liveness": "live", "cadence_seconds": 900.0, "silent_after_seconds": 1800.0, "last_report_at": "2026-09-27T12:09:11.718266+00:00", "silent_for_seconds": 500.0, "withheld": ["collector_id", "declared_surfaces"]}, "held_since": "2026-09-27T12:17:31.699485+00:00", "held_seconds": 0.0}, {"surface": "host:mac/disk", "observation": "healthy", "method": "reported", "summary": "39.6GB free, 41 days of runway", "source": "statvfs:/", "read_at": "2026-09-27T12:09:11.489622+00:00", "detail": {"free_gb": 39.6, "free_bytes": 42524872704, "floor_gb": 5.0, "slope_gb_per_day": -0.838, "total_gb": 228.27, "samples": 2011, "pct_free": 17.35, "runway_days": 41.3, "withheld": ["collector_id", "received_at", "reported_method", "wire_row_id"]}, "held_since": "2026-09-26T23:51:11.248707+00:00", "held_seconds": 44280.2, "reported_by": "kevin-mac"}, {"surface": "cron:morning-brief", "observation": "healthy", "method": "reported", "summary": "brief sent 1.1h ago", "source": "brief-send-log.jsonl", "read_at": "2026-09-27T12:09:11.490123+00:00", "detail": {"age_hours": 1.13, "window_hours": 30.0, "last_send_at": "2026-09-27T11:01:25.939225+00:00", "row_count": 48, "withheld": ["collector_id", "received_at", "reported_method", "wire_row_id"]}, "held_since": "2026-09-26T23:51:11.249184+00:00", "held_seconds": 44280.2, "reported_by": "kevin-mac"}, {"surface": "cron:gcal-sync", "observation": "healthy", "method": "reported", "summary": "last success 0.2h ago", "source": "gcal-sync-heartbeat.json", "read_at": "2026-09-27T12:09:11.490519+00:00", "detail": {"age_hours": 0.15, "window_hours": 1.0, "last_success": "2026-09-27T12:00:01.625046+00:00", "withheld": ["collector_id", "counts", "received_at", "reported_method", "skipped", "wire_row_id"]}, "held_since": "2026-09-26T23:51:11.249607+00:00", "held_seconds": 44280.2, "reported_by": "kevin-mac"}, {"surface": "backup:baserow", "observation": "healthy", "method": "reported", "summary": "backup 4.2h old (31 retained)", "source": "infra-baserow-1:/baserow/backups", "read_at": "2026-09-27T12:09:11.583424+00:00", "detail": {"newest": "baserow_backup_20260927_030000.tar.gz", "age_hours": 4.15, "newest_at": "2026-09-27T08:00:00+00:00", "window_hours": 26.0, "backup_count": 31, "withheld": ["collector_id", "received_at", "reported_method", "wire_row_id"]}, "held_since": "2026-09-26T23:51:11.304368+00:00", "held_seconds": 44280.3, "reported_by": "kevin-mac"}, {"surface": "cron:comms-freshness", "observation": "healthy", "method": "reported", "summary": "last success 0.2h ago", "source": "comms-freshness-run.json", "read_at": "2026-09-27T12:09:11.584060+00:00", "detail": {"age_hours": 0.18, "alarm": true, "window_hours": 1.5, "last_success": "2026-09-27T11:58:25.019566+00:00", "invoked_by": "interactive", "withheld": ["collector_id", "received_at", "reported_method", "stale", "wire_row_id"]}, "held_since": "2026-09-26T23:51:11.304923+00:00", "held_seconds": 44280.3, "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": "2026-09-27T12:09:11.584272+00:00", "detail": {"age_hours": 0.0, "window_hours": 0.5, "last_success": "2026-09-27T12:09:02+00:00", "http_code": 200, "withheld": ["collector_id", "probe", "received_at", "reported_method", "wire_row_id"]}, "held_since": "2026-09-26T23:51:11.305105+00:00", "held_seconds": 44280.3, "reported_by": "kevin-mac"}, {"surface": "cron:kai-cadence", "observation": "healthy", "method": "reported", "summary": "last success 0.2h ago", "source": "kai-cadence-heartbeat.json", "read_at": "2026-09-27T12:09:11.584606+00:00", "detail": {"age_hours": 0.15, "window_hours": 26.0, "last_success": "2026-09-27T12:00:06.886986+00:00", "outcome": "posted", "invoked_by": "cadence", "withheld": ["collector_id", "received_at", "reported_method", "wire_row_id"]}, "held_since": "2026-09-26T23:51:11.305582+00:00", "held_seconds": 44280.3, "reported_by": "kevin-mac"}, {"surface": "cron:devpost", "observation": "healthy", "method": "reported", "summary": "last success 7.6h ago", "source": "devpost-heartbeat.json", "read_at": "2026-09-27T12:09:11.585094+00:00", "detail": {"age_hours": 7.6, "window_hours": 26.0, "last_success": "2026-09-27T04:33:28.447039+00:00", "withheld": ["collector_id", "hb_source", "received_at", "reported_method", "row", "wire_row_id"]}, "held_since": "2026-09-26T23:51:11.305748+00:00", "held_seconds": 44280.3, "reported_by": "kevin-mac"}, {"surface": "cron:digest-hackfw", "observation": "healthy", "method": "reported", "summary": "last success 0.2h ago", "source": "index.html.heartbeat.json", "read_at": "2026-09-27T12:09:11.585566+00:00", "detail": {"bytes": 42714, "age_hours": 0.15, "window_hours": 1.0, "brand": "hackfw", "last_success": "2026-09-27T12:00:01.429428+00:00", "changed": false, "withheld": ["collector_id", "received_at", "reported_method", "wire_row_id"]}, "held_since": "2026-09-26T23:51:11.306141+00:00", "held_seconds": 44280.3, "reported_by": "kevin-mac"}, {"surface": "cron:digest-tmb", "observation": "healthy", "method": "reported", "summary": "last success 0.2h 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