simplify

name	simplify
description	Review changed code for reuse, quality, and efficiency, then fix any issues found.
agent	build
argument-hint	<optional focus area or file path>

Review the code changed in this session (or the files specified in $ARGUMENTS) and improve it.

Phase 1 - Identify Changes

• Run git diff --name-only HEAD to find modified files. If $ARGUMENTS specifies files, use those instead.
• If no changes exist, report that there is nothing to review and stop.

Phase 2 - Analyze

For each changed file, evaluate:

1. Reuse: Is there existing code in the codebase that does the same thing? Search for similar patterns with grep/glob before concluding something is novel.
2. Quality: Are there code smells — deep nesting, long functions, unclear names, dead code, missing error handling at boundaries?
3. Efficiency: Are there obvious performance issues — N+1 queries, unnecessary allocations, redundant computations in loops?

Do NOT flag:

• Style preferences that don't affect correctness or readability
• Missing abstractions for hypothetical future needs
• Comments or documentation style

Phase 3 - Fix

• Apply fixes directly using edit/write tools.
• Each fix must be a concrete improvement, not a lateral move.
• Do not refactor beyond what the analysis found — no speculative restructuring.
• Preserve existing behavior exactly.

Phase 4 - Verify

• Run the project's typecheck (pnpm run typecheck or equivalent) to confirm no regressions.
• If tests exist for the changed files, run them.
• Report what was changed and why.

Constraints

• Do not add features or new abstractions.
• Do not modify files that were not identified in Phase 1.
• Follow the repository's existing conventions (check AGENTS.md).