# Section 03 Code Review Interview

## Auto-fixes Applied

### Fix 1: Defensive guard for `intended_use=None`
- **Source:** Review issue #2 (HIGH)
- **Action:** Added `if intended_use is None: intended_use = ""` at top of `_build_suggest_scale`
- **Rationale:** FastMCP doesn't enforce type constraints; prevents crash if client sends null

### Fix 2: Test for reference mode + missing scene
- **Source:** Review issue #3 (LOW)
- **Action:** Added `test_suggest_scale_reference_mode_missing_scene` test
- **Rationale:** Exercises the scene-not-found guard in reference mode code path

## Let Go (No Action)

### Issue 1: `session` param dropped from `_reference_mode`
- Plan spec included `session` but it's unused. Cleaner without it.

### Issue 4: Stale sprint docstring in test file
- Existing file header references Sprint 3c. Not worth a churn-only change.

## Verification

All 16 tests passing after fixes.
