{"title":"Friendlier greeting and add bye helper","body":"## Summary\n\n- `greet` now returns `Hello, <name>!` instead of `hi <name>`\n- Added a `bye` helper in `greet.ts` that returns `Bye, <name>`\n- Note: `bye` omits the trailing `!`, so punctuation differs from `greet`\n\n## Testing\n\n- Not run — no test suite or type-check was executed for this change\n- Suggested: type-check `greet.ts` and verify `greet(\"Ada\")` → `Hello, Ada!` and `bye(\"Ada\")` → `Bye, Ada`"}
