{"surfaces": [{"surface": "host:disk/", "observation": "healthy", "method": "local_artifact", "summary": "755.7GB free, 368457189 days of runway", "source": "statvfs:/", "read_at": "2026-09-26T12:11:20.556314+00:00", "detail": {"free_bytes": 811478810624, "free_gb": 755.75, "total_gb": 755.75, "pct_free": 100.0, "floor_gb": 5.0, "samples": 1430, "slope_gb_per_day": -0.0, "runway_days": 368457189.3}, "held_since": "2026-09-26T12:11:20.556314+00:00", "held_seconds": 0.0}, {"surface": "collector:kevin-mac", "observation": "healthy", "method": "local_artifact", "summary": "collector kevin-mac last reported 501s ago, inside its declared 1800s deadline", "source": "verify:collector_liveness", "read_at": "2026-09-26T12:11:18.551946+00:00", "detail": {"liveness": "live", "cadence_seconds": 900.0, "silent_after_seconds": 1800.0, "last_report_at": "2026-09-26T12:02:57.782984+00:00", "silent_for_seconds": 500.8, "withheld": ["collector_id", "declared_surfaces"]}, "held_since": "2026-09-26T12:11:18.551946+00:00", "held_seconds": 0.0}, {"surface": "host:mac/disk", "observation": "fault", "method": "reported", "summary": "14.1GB free but losing 0.90GB/day: hits the floor in 10.1 days", "source": "statvfs:/", "read_at": "2026-09-26T12:02:57.511183+00:00", "detail": {"pct_free": 6.18, "floor_gb": 5.0, "runway_days": 10.1, "free_gb": 14.11, "free_bytes": 15154118656, "slope_gb_per_day": -0.898, "total_gb": 228.27, "samples": 2011, "withheld": ["collector_id", "received_at", "reported_method", "wire_row_id"]}, "held_since": "2026-09-25T23:44:57.511911+00:00", "held_seconds": 44280.0, "reported_by": "kevin-mac"}, {"surface": "cron:morning-brief", "observation": "healthy", "method": "reported", "summary": "brief sent 1.0h ago", "source": "brief-send-log.jsonl", "read_at": "2026-09-26T12:02:57.511767+00:00", "detail": {"last_send_at": "2026-09-26T11:01:26.709275+00:00", "row_count": 47, "age_hours": 1.03, "window_hours": 30.0, "withheld": ["collector_id", "received_at", "reported_method", "wire_row_id"]}, "held_since": "2026-09-25T23:44:57.519415+00:00", "held_seconds": 44280.0, "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": "2026-09-26T12:02:57.512242+00:00", "detail": {"last_success": "2026-09-26T12:00:01.204465+00:00", "age_hours": 0.05, "window_hours": 1.0, "withheld": ["collector_id", "counts", "received_at", "reported_method", "skipped", "wire_row_id"]}, "held_since": "2026-09-25T23:44:57.520012+00:00", "held_seconds": 44280.0, "reported_by": "kevin-mac"}, {"surface": "backup:baserow", "observation": "healthy", "method": "reported", "summary": "backup 4.0h old (31 retained)", "source": "infra-baserow-1:/baserow/backups", "read_at": "2026-09-26T12:02:57.604169+00:00", "detail": {"newest_at": "2026-09-26T08:00:00+00:00", "age_hours": 4.05, "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": "2026-09-25T23:44:57.603731+00:00", "held_seconds": 44280.0, "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": "2026-09-26T12:02:57.604834+00:00", "detail": {"invoked_by": "interactive", "alarm": true, "last_success": "2026-09-26T11:58:12.829733+00:00", "age_hours": 0.08, "window_hours": 1.5, "withheld": ["collector_id", "received_at", "reported_method", "stale", "wire_row_id"]}, "held_since": "2026-09-25T23:44:57.604112+00:00", "held_seconds": 44280.0, "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": "2026-09-26T12:02:57.605120+00:00", "detail": {"http_code": 200, "last_success": "2026-09-26T11:58:30+00:00", "age_hours": 0.07, "window_hours": 0.5, "withheld": ["collector_id", "probe", "received_at", "reported_method", "wire_row_id"]}, "held_since": "2026-09-25T23:44:57.604272+00:00", "held_seconds": 44280.0, "reported_by": "kevin-mac"}, {"surface": "cron:kai-cadence", "observation": "healthy", "method": "reported", "summary": "last success 0.0h ago", "source": "kai-cadence-heartbeat.json", "read_at": "2026-09-26T12:02:57.605321+00:00", "detail": {"invoked_by": "cadence", "last_success": "2026-09-26T12:01:07.156373+00:00", "age_hours": 0.03, "outcome": "posted", "window_hours": 26.0, "withheld": ["collector_id", "received_at", "reported_method", "wire_row_id"]}, "held_since": "2026-09-25T23:44:57.604644+00:00", "held_seconds": 44280.0, "reported_by": "kevin-mac"}, {"surface": "cron:devpost", "observation": "healthy", "method": "reported", "summary": "last success 7.5h ago", "source": "devpost-heartbeat.json", "read_at": "2026-09-26T12:02:57.605760+00:00", "detail": {"last_success": "2026-09-26T04:33:20.605551+00:00", "age_hours": 7.49, "window_hours": 26.0, "withheld": ["collector_id", "hb_source", "received_at", "reported_method", "row", "wire_row_id"]}, "held_since": "2026-09-25T23:44:57.604872+00:00", "held_seconds": 44280.0, "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": "2026-09-26T12:02:57.606272+00:00", "detail": {"brand": "hackfw", "changed": false, "last_success": "2026-09-26T12:00:01.009305+00:00", "bytes": 42714, "age_hours": 0.05, "window_hours": 1.0, "withheld": ["collector_id", "received_at", "reported_method", "wire_row_id"]}, "held_since": "2026-09-25T23:44:57.605186+00:00", "held_seconds": 44280.0, "reported_by": "kevin-mac"}, {"surface": "cron:digest-tmb", "observation": "healthy", "method": "reported", "summary": "last success 0.0h 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