Lesson 149: Toy workload cost instincts
Focus
Swap placeholder nouns for your internal service names immediately. Token Toy workload cost instincts:149 keeps neighbouring lessons differentiable.
Key ideas
- Thread: Toy workload cost instincts · drill v9 · spin
503564. - Habit: attach a trace_id to every completion you would paste into an ops dashboard.
- Guardrail: add one RACI bullet for prompt or index changes before tomorrow's standup.
Deep dive notebook
Synthetic drill artefacts
Logging contract
| Field | Retention |
|-------|-----------|
| trace_id | 9d |
| prompt_hash | policy-defined |
| completion_excerpt | 24h hot |
Mask tier `pii-v0` before persistence.
Practice
Practice Attach rollback steps if cost-per-request crosses your guardrail. — 149 Bump 39.