Investigations and lessons
Each record summarizes what was established during a dated window: what happened, what we learned, and what stayed uncertain. Records describe the past; they do not certify current health. Detailed evidence and unfinished work are kept privately.
| Record | Period | About |
|---|---|---|
| Storage reliability, capacity, and backups | 2026-10 | Space reclamation, two-copy placement, the stock runtime cutover |
| Lakehouse and workflow experiments | 2026-10 | Retiring Airflow, Spark, Trino, and Temporal |
| Operation contracts and agent workflows | 2026-08 to 10 | Shared safety contracts and workflow lessons |
| Metric and resource experiments | 2026-08 to 10 | Measurement contracts and request right-sizing |
| Security and credential delivery | 2026-07 to 09 | Secret-provider quota and review findings |
| Flux and platform reliability | 2026-05 to 10 | Probe-blocking policies and dependency ordering |
| Observability and logging | 2026-04 to 10 | Monitoring-path failures, log loss, and the delivery canary |
| Reboot and thermal investigations | 2026-04 to 10 | Silent reboots, idle-state tuning, an open cooling fault |
| Learning experiments and scope | 2026 | The old playground and the rule for new experiments |
| DNS ownership and monitoring capacity | 2026 | Stale public DNS and a full Prometheus volume |