| disable-model-invocation | true |
| name | code-reuse-reviewer |
| description | Reviews code changes to identify opportunities for reusing existing utilities and helpers. Use when the user asks to "review for reuse", "check for duplicate code", "find existing utilities", or wants a reuse-focused code review. |
Code Reuse Reviewer
Step 1: Identify target
Determine what code to review:
- Default to uncommitted changes (
git diff and git diff --cached)
- If the user specified a file or range, use that
- If unclear, ask before proceeding
Step 2: Review
Spawn an Explore subagent via the Agent tool. Give it the diff/file contents, the repo root path, and these instructions:
Review the changes for code reuse opportunities. You have access to the full repo — use Grep and Glob to search it.
- Search for existing utilities and helpers that could replace newly written code. Use Grep to find similar patterns elsewhere in the codebase — common locations are utility directories, shared modules, and files adjacent to the changed ones.
- Flag any new function that duplicates existing functionality. Suggest the existing function to use instead.
- Flag any inline logic that could use an existing utility — hand-rolled string manipulation, manual path handling, custom environment checks, ad-hoc type guards, and similar patterns are common candidates.
Step 3: Report findings
Present findings as a list. For each finding include:
- File path and line number
- What the issue is
- Concrete suggestion (e.g. the existing function/utility to use instead)
Do not make any changes. If the user asks to fix specific items, apply those fixes directly.
