## Summary
<!-- What changed and why -->

## Change Class
- [ ] **A** Style only (auto-merge eligible)
- [ ] **B** Refactor (perf + golden dataset verification)
- [ ] **C** Behavioral (backtest delta + risk sign-off)

## Controls Touched (NIST 800-53r5)
<!-- e.g., AC-3, AU-6, CM-6 — or "none" -->

## AI-Assisted Development
- [ ] AI tools used in this PR
- AI-Assisted-By: <!-- tool name and version, or N/A -->

## Determinism
- Seed handling: <!-- describe or N/A -->
- Replay artifacts updated: [ ] Yes / [ ] N/A

## Security
- Secrets changed? [ ]
- Egress changes? [ ] (OPA policy updated?)

## AI Risks Touched
- [ ] Model behavior / training data / prompt changes
- [ ] Risk register updated: [ ] Yes / [ ] N/A
