# Code Review — Step 2: Refactor `Register`

**Verdict: approve.**

The Step 2 refactor now does what the task asked: `NewRegistry` / `NewRegistryWithOptions` store a typed `*intervals.Client`, `defaultRegistry.Register` no longer fans out through runtime interface assertions, registration order and the special collaborator wiring are preserved, and `AddTool` failures are wrapped with the failing tool name, including `icuvisor_list_advanced_capabilities`.

No blocking findings.

## Notes

- The old `schemaCatalogClient` remains in `internal/toolchecks/schema_stability.go`; that is consistent with Step 3 still being pending, though the new helper already routes schema/catalog generation through a no-network real `*intervals.Client` plus an allow-list to preserve the current 30-snapshot surface.
- The registry-tier test now exercises full `*intervals.Client` registration and covers all 38 expected production tools, which is a useful regression guard for the direct-wiring change.

## Verification

Commands run:

- `git diff 01d92c37b10a322c045476eb08e82d7a573c51e7..HEAD --name-only`
- `git diff 01d92c37b10a322c045476eb08e82d7a573c51e7..HEAD`
- `go test ./...` — passes
- `make lint` — passes
- `make test-race` — passes
- `go run ./scripts/check_schema_stability.go` — passes
- `make build` — passes
- `git diff --check 01d92c37b10a322c045476eb08e82d7a573c51e7..HEAD` — passes
