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A Claude Code agent prompt for behavior-preserving codebase migrations and refactoring. It plans framework upgrades (React, Next.js, TypeScript, ESLint), applies named refactoring patterns, modernizes legacy JavaScript, and works incrementally on a git branch with test validation between steps.

Intelligent code refactoring command that analyzes code structure and applies best practices for improved maintainability and performance

Copy-paste detection MCP server that scans a codebase and lets AI assistants check snippets, inspect duplication statistics, and review current-directory duplication through jscpd's detection engine.

Go MCP server that launches an existing stdio language server and exposes semantic code-navigation tools such as definitions, references, hover, diagnostics, symbol rename, and file edits.

Serena is an open-source coding-agent toolkit by Oraios that gives Claude semantic, symbol-level code tools backed by language servers, so it can find, read, and edit code precisely instead of pasting whole files.

A practical walkthrough of Claude Code checkpointing: how automatic checkpoints capture code before each edit, how to rewind and summarize with /rewind, the difference between restore and summarize, and the limitations you must know before a risky refactor.

A repeatable explore-plan-implement-verify workflow for large code migrations and refactors with Claude Code, using plan mode, /rewind checkpoints, subagents, and claude -p fan-out for batch file changes.

Use the built-in /context command to inspect Claude Code's context-window usage, plus a custom .claude/commands recipe for repeatable codebase-context analysis before refactors.

A Claude Code SessionEnd hook that scans a project for dead code and writes a report to .claude/reports. It runs available tools per language: ESLint and Knip for JS/TS, autoflake or pylint for Python, Knip for unused npm dependencies, ripgrep for unreferenced src files, and jq to flag zero-coverage files.

Custom slash command for behavior-preserving, scoped refactors of one file, function, or selection — stays inside a narrow ownership boundary for a reviewable, PR-sized change instead of a repo-wide pass

Configure and optimize Cursor and Windsurf AI code editors for maximum productivity. Set up agent mode, composer features, keybindings, and AI-powered refactoring workflows. Customize with .cursorrules and .windsurfrules for project-specific guidance.