# Code Review R001 — Step 3: Implement `get_extended_metrics`

Verdict: **APPROVE**

I ran:

- `git diff 9e96803b93eb4d21f53cdaa46a535a662a290255..HEAD --name-only`
- `git diff 9e96803b93eb4d21f53cdaa46a535a662a290255..HEAD`
- `go test ./...` (passes)

## Findings

No blocking findings.

## Notes

- The previous Step 3 concerns are addressed: Strava-blocked activity stubs now return the standard `strava_imported`/`unavailable.reason: strava_tos` shape, and recursive scale detection preserves `_meta.scales` for nested `metrics.rpe`, `metrics.feel`, and `metrics.session_rpe`.
- The implementation stays aligned with the approved Step 3 plan: it uses only activity, intervals, and power-vs-HR sources; converts upstream J values to `_kj`; gates raw payloads behind `include_full`; and records optional-source partials in `_meta`.
- Step 4 should add targeted tests for the new tool, especially field omission, J→kJ conversion, Strava-unavailable handling, nested scale metadata, and optional-source partial metadata.
