The 2026-10-02 outage had three causes the runbook now prevents:
- floating tag drift (README now mandates exact-tag pinning)
- 256MB default cgroup cap OOM-killing the prisma migration engine
(manifest now sets memoryLimit: 2147483648)
- no _prisma_migrations ledger -> P3005 crash-loop on boot
(start.sh now exports LITELLM_MIGRATION_DIR=/app/data/migrations)
README 'Updating LiteLLM' section rewritten from the old (wrong)
floating-tag procedure into a runbook with rules + verify checklist.
