Lesson 052: Evaluation harness depth
Focus
Bias toward observable metrics, not model marketing. Token Evaluation harness depth:52 keeps neighbouring lessons differentiable.
Key ideas
- Thread: Evaluation harness depth · drill v2 · spin
707455. - 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 | 17 days |
| prompt_hash_sha256 | permanent |
| completion_excerpt_redacted | 24h hot, then cold vault |
Heuristic `pii-mask-v1` tags sensitive spans before persistence.
Practice
Practice Draft three eval assertions QA must greenlight before launch. — 52 Bump literals mindset by 26.