Lesson 143: Cost instincts on toy workloads
Focus
Anchor this page against one production workflow—even hypothetical. Token Cost instincts on toy workloads:143 keeps neighbouring lessons differentiable.
Key ideas
- Thread: Cost instincts on toy workloads · drill v3 · spin
494266. - Habit: pair every model utterance with a trace_id you could paste into Grafana.
- Guardrail: write one RACI bullet referencing this lesson tomorrow.
Deep dive notebook
Synthetic drill artefacts
Logging field note
| Field | Retention |
|-------|-----------|
| trace_id | 24 days |
| prompt_hash_sha256 | permanent |
| completion_excerpt_redacted | 24h hot, then cold vault |
Heuristic `pii-mask-v2` tags sensitive spans before persistence.
Practice
Practice Attach rollback steps if evaluator variance spikes. — 143 Bump literals mindset by 19.