{"surfaces": [{"surface": "host:disk/", "observation": "healthy", "method": "local_artifact", "summary": "755.7GB free, 199817 days of runway", "source": "statvfs:/", "read_at": "2026-09-26T18:26:52.648680+00:00", "detail": {"free_bytes": 811478810624, "free_gb": 755.75, "total_gb": 755.75, "pct_free": 100.0, "floor_gb": 5.0, "samples": 4, "slope_gb_per_day": -0.004, "runway_days": 199816.7}, "held_since": "2026-09-26T18:26:52.648680+00:00", "held_seconds": 0.0}, {"surface": "collector:kevin-mac", "observation": "healthy", "method": "local_artifact", "summary": "collector kevin-mac last reported 432s ago, inside its declared 1800s deadline", "source": "verify:collector_liveness", "read_at": "2026-09-26T18:26:51.253716+00:00", "detail": {"liveness": "live", "cadence_seconds": 900.0, "silent_after_seconds": 1800.0, "last_report_at": "2026-09-26T18:19:39.101525+00:00", "silent_for_seconds": 432.2, "withheld": ["collector_id", "declared_surfaces"]}, "held_since": "2026-09-26T18:26:51.253716+00:00", "held_seconds": 0.0}, {"surface": "host:mac/disk", "observation": "fault", "method": "reported", "summary": "14.1GB free but losing 0.94GB/day: hits the floor in 9.7 days", "source": "statvfs:/", "read_at": "2026-09-26T18:19:38.837573+00:00", "detail": {"free_gb": 14.13, "free_bytes": 15174144000, "floor_gb": 5.0, "slope_gb_per_day": -0.944, "total_gb": 228.27, "samples": 2011, "pct_free": 6.19, "runway_days": 9.7, "withheld": ["collector_id", "received_at", "reported_method", "wire_row_id"]}, "held_since": "2026-09-26T06:01:31.280121+00:00", "held_seconds": 44287.6, "reported_by": "kevin-mac"}, {"surface": "cron:morning-brief", "observation": "healthy", "method": "reported", "summary": "brief sent 7.3h ago", "source": "brief-send-log.jsonl", "read_at": "2026-09-26T18:19:38.837933+00:00", "detail": {"age_hours": 7.3, "window_hours": 30.0, "last_send_at": "2026-09-26T11:01:26.709275+00:00", "row_count": 47, "withheld": ["collector_id", "received_at", "reported_method", "wire_row_id"]}, "held_since": "2026-09-26T06:01:31.280686+00:00", "held_seconds": 44287.6, "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": "2026-09-26T18:19:38.838156+00:00", "detail": {"age_hours": 0.16, "window_hours": 1.0, "last_success": "2026-09-26T18:10:01.667042+00:00", "withheld": ["collector_id", "counts", "received_at", "reported_method", "skipped", "wire_row_id"]}, "held_since": "2026-09-26T06:01:31.281122+00:00", "held_seconds": 44287.6, "reported_by": "kevin-mac"}, {"surface": "backup:baserow", "observation": "healthy", "method": "reported", "summary": "backup 10.3h old (31 retained)", "source": "infra-baserow-1:/baserow/backups", "read_at": "2026-09-26T18:19:38.920083+00:00", "detail": {"newest": "baserow_backup_20260926_030000.tar.gz", "age_hours": 10.33, "newest_at": "2026-09-26T08:00:00+00:00", "window_hours": 26.0, "backup_count": 31, "withheld": ["collector_id", "received_at", "reported_method", "wire_row_id"]}, "held_since": "2026-09-26T06:01:31.363977+00:00", "held_seconds": 44287.6, "reported_by": "kevin-mac"}, {"surface": "cron:comms-freshness", "observation": "healthy", "method": "reported", "summary": "last success 0.4h ago", "source": "comms-freshness-run.json", "read_at": "2026-09-26T18:19:38.920423+00:00", "detail": {"age_hours": 0.36, "alarm": true, "window_hours": 1.5, "last_success": "2026-09-26T17:58:15.754372+00:00", "invoked_by": "interactive", "withheld": ["collector_id", "received_at", "reported_method", "stale", "wire_row_id"]}, "held_since": "2026-09-26T06:01:31.364610+00:00", "held_seconds": 44287.6, "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": "2026-09-26T18:19:38.920617+00:00", "detail": {"age_hours": 0.02, "window_hours": 0.5, "last_success": "2026-09-26T18:18:37+00:00", "http_code": 200, "withheld": ["collector_id", "probe", "received_at", "reported_method", "wire_row_id"]}, "held_since": "2026-09-26T06:01:31.364811+00:00", "held_seconds": 44287.6, "reported_by": "kevin-mac"}, {"surface": "cron:kai-cadence", "observation": "healthy", "method": "reported", "summary": "last success 1.8h ago", "source": "kai-cadence-heartbeat.json", "read_at": "2026-09-26T18:19:38.920904+00:00", "detail": {"age_hours": 1.83, "window_hours": 26.0, "last_success": "2026-09-26T16:30:07.402834+00:00", "outcome": "posted", "invoked_by": "cadence", "withheld": ["collector_id", "received_at", "reported_method", "wire_row_id"]}, "held_since": "2026-09-26T06:01:31.365135+00:00", "held_seconds": 44287.6, "reported_by": "kevin-mac"}, {"surface": "cron:devpost", "observation": "healthy", "method": "reported", "summary": "last success 0.3h ago", "source": "devpost-heartbeat.json", "read_at": "2026-09-26T18:19:38.921110+00:00", "detail": {"age_hours": 0.27, "window_hours": 26.0, "last_success": "2026-09-26T18:03:24.446623+00:00", "withheld": ["collector_id", "hb_source", "received_at", "reported_method", "row", "wire_row_id"]}, "held_since": "2026-09-26T06:01:31.365394+00:00", "held_seconds": 44287.6, "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": "2026-09-26T18:19:38.921329+00:00", "detail": {"bytes": 42714, "age_hours": 0.16, "window_hours": 1.0, "brand": "hackfw", "last_success": "2026-09-26T18:10:01.345612+00:00", "changed": false, "withheld": ["collector_id", "received_at", "reported_method", "wire_row_id"]}, "held_since": "2026-09-26T06:01:31.365741+00:00", "held_seconds": 44287.6, "reported_by": "kevin-mac"}, {"surface": "cron:digest-tmb", "observation": "healthy", "method": "reported", "summary": "last success 0.2h 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