GenAI Intermediate — 012: pair eval slices on `RAG design trade spaces` — memo `34912 [12]`

Lesson 012: RAG design trade spaces

Focus

Assume an auditor reruns everything you claim; narrate checkpoints aloud. Token RAG design trade spaces:12 keeps neighbouring lessons differentiable.

Key ideas

• Thread: RAG design trade spaces · drill v2 · spin 58839.
• 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

Token CFO scratchpad

- prompt_budget_tokens: 1304
- completion_budget_tokens: 545
- cache_signature: `18d4`

Hypothesis: halving completions moves P95 `4`%; record actuals.

Practice

Practice Simulate degraded retrieval once; screenshot graceful degradation copy. — 12 Bump literals mindset by 28.