# R003 code review — Step 1: Tier enum and parsing

Verdict: **APPROVE**

## Findings

No blocking findings.

The implementation satisfies Step 1's scope: `safety.Toolset` is distinct from delete mode, parsing is case-insensitive with invalid/empty values defaulting to `core`, `ICUVISOR_TOOLSET` is wired through `.env`/environment config loading, `ServerInfo` receives the resolved tier, and startup logging emits a single resolved-toolset line without tool names.

## Verification

- `git diff f19e47e0b0ac52f53707587c1e3e5c37f1a4accc..HEAD --name-only`
- `git diff f19e47e0b0ac52f53707587c1e3e5c37f1a4accc..HEAD`
- `go test ./...` — passed
- `git diff --check f19e47e0b0ac52f53707587c1e3e5c37f1a4accc..HEAD` — passed

## Notes for next steps

- Step 3 should ensure the registry filter uses the same resolved `Toolset` carried from config/startup, rather than re-reading environment or adding a model-controlled override.
- Step 5 should add the response `_meta.toolset` chokepoint alongside the existing delete-mode metadata.
