# Feedback: APPROVED ✅

## Decision
**ACTION: APPROVE** — All acceptance criteria met. Tests pass (357/357). No blocking issues.

## Summary
Variable name interning implementation is complete and ready for merge. The VariableInterner struct is properly integrated throughout the compiler and VM, all bytecode instructions use u32 IDs instead of strings, and variable storage uses HashMap<u32, Value> with correct local-then-global scope resolution. Implementation is solid.

## Non-Blocking Items (Can Be Addressed in Follow-Up)
These are optimization opportunities that don't block this PR:

1. **Missing test coverage for VariableInterner getter methods**: The get_name() and get_all_names() methods lack direct unit tests. Consider adding tests to verify these methods work correctly for both pre-interned and dynamically-interned variables.

2. **Inefficient var_id lookup for function parameters**: During function calls, the VM performs O(n) linear search to find parameter var_ids. Consider optimizing by having the compiler emit parameter var_ids directly in DefineFunction bytecode.

3. **Missing #[inline] hints**: The intern() method is called frequently during compilation and would benefit from #[inline] optimization hint.

4. **Missing documentation**: Add doc comment to Default impl explaining that it pre-interns a-z and common names.

All 13 new tests pass and comprehensively cover the feature. Ready to merge.
