# Code Review — TP-077 Step 2

Verdict: **approve**

## Findings

No blocking findings. The current Step 2 changes add focused red coverage for the discovered upstream contract:

- `internal/intervals` now checks create payloads against the sanitized accepted fixture and proves missing/blank `FolderID` must be rejected before network I/O.
- `internal/tools` now requires the tool boundary/schema to treat `folder_id` as required, documents the existing-folder/owned-by-athlete contract, and keeps unrelated happy-path and validation cases supplied with a sanitized folder ID.
- The previous review items around no-network intervals validation, schema examples, and non-folder bad-argument rows have been addressed.

## Validation run

- `go test ./internal/tools ./internal/intervals -run 'CreateWorkout|CreateLibraryWorkout'` fails as expected on the new red assertions:
  - `TestCreateWorkoutRejectsBadArguments`
  - `TestCreateWorkoutRegistrationMetadata`
  - `TestCreateLibraryWorkoutRequiresWritableBasics`
