code-simplify

To refactor code to be DRY without behavior changes, this skill reviews your git diff for code smells and routes structural changes through a prewritten test safety net. Mechanical fixes are applied directly while risky refactors are user-gated to prevent drift.

Cleaning up duplicated code in a git diff is handled by diff-driven scoping that reads changed files in full to target exact areas. It concurrently checks for reuse opportunities and DRY violations, expanding to sibling files only when a flagged smell justifies it.

A code review identifies code smells and efficiency issues by running parallel review agents guided by a shared catalog. These agents concurrently detect DRY violations, poor naming, tight coupling, magic numbers, redundant work, and missed concurrency opportunities.

Refactoring safely without tests is not recommended because this skill enforces a structural-refactor safety net via prewritten tests. Mechanical fixes can be applied directly, but structural changes require a test net requirement to prevent behavior drift.

This refactoring approach works only on changed files by scoping via git diff against the merge-base. It focuses on a targeted set of files within the working tree, optionally expanding to sibling files only when a flagged code smell justifies it.

Refactors require typecheck and safety tests afterward to re-verify that behavior remains unchanged after structural modifications. The skill prompts before applying risky refactors and uses these checks to enforce a strict safety net against behavior drift.