# R022 code review — Step 4: Tests and verification

Verdict: APPROVE

I reviewed the Step 4 diff and ran:

```sh
git diff b8ba34ab28eddda8252d568f2727d0cbc7d2c524..HEAD --name-only
git diff b8ba34ab28eddda8252d568f2727d0cbc7d2c524..HEAD
go test -count=1 ./internal/tools
go test -count=1 ./internal/analysis ./internal/tools ./internal/toolcatalog ./internal/toolchecks ./internal/safety ./cmd/gendocs
make docs-tools && git diff --exit-code -- web/content/reference/tools.md internal/toolcatalog
golangci-lint run ./internal/tools
```

The targeted tests pass, and `make docs-tools` leaves the generated tool reference/catalog outputs clean. The R019/R020/R021 coverage gaps are addressed: the unused helper is gone, compliance now has negative `event_type` and strictly-preferable non-`Run` activity fixtures, and the load-balance precomputed path asserts no interval/stream fetches.

## Blocking findings

None.

## Notes

- `golangci-lint run ./internal/tools` still fails on pre-existing implementation issues outside this Step 4 test diff:
  - `internal/tools/compute_baseline.go`: `unparam` for `metric` in `collectWellnessBaseline` and `collectActivityBaseline`
  - `internal/tools/compute_zone_time.go`: `unparam` for `metric` in `loadValueForZoneMetric`, plus unused `_compileComputeZoneFmtUse`
  - `internal/tools/compute_compliance_rate.go`: unused `linkedActivityForEvent`
- These lint failures remain relevant for the Step 5 quality gate, but I did not treat them as Step 4 blockers because they were not introduced by the test-only diff under review.
