Diffr

Searches for duplicate code, duplicate tests, and dead code, then safely merges or removes them. Use when the user says "deduplicate", "find duplicates", "remove dead code", "DRY up", or "code dedup". Requires test coverage — refuses to touch untested code.

Fix a bug using test-driven development. Use when the user reports a bug, describes unexpected behavior, wants to fix a defect, or says something is broken. Enforces a strict test-first workflow where a failing test must be written and verified before any fix is attempted.

Audit spec/plan documents against the codebase. Ensures every spec section has implementing code, tests, and matching logic. Use when the user says "check specs", "spec audit", or "verify specs".

Upgrade all dependencies/packages to their latest versions. Diffr is TypeScript/Node — use when the user says "upgrade packages", "update dependencies", "bump versions", "update packages", or "upgrade deps".

Prepares the current branch for CI by running the exact same steps locally and fixing issues. If CI is already failing, fetches the GH Actions logs first to diagnose. Use before pushing, when CI is red, or when the user says "fix ci".

Creates a pull request with a well-structured description after verifying CI passes. Use when the user asks to submit, create, or open a pull request.

Audits a website for SEO, AI search performance, structured data, mobile usability, broken links, and social media cards. Fixes issues found. Use when the user mentions "audit website", "SEO", "fix search ranking", "AI search", "structured data", "social media cards", or "website performance".