Claude Code plugins

by Jesse Vincent

An agentic skills framework & software development methodology that works: planning, TDD, debugging, and collaboration workflows.

by Affaan Mustafa

Harness-native ECC workflows for Codex: shared skills, production-ready MCP configs, and selective-install-aligned conventions for TDD, security scanning, code review, and autonomous development.

by forrestchang

Behavioral guidelines to reduce common LLM coding mistakes, derived from Andrej Karpathy's observations on LLM coding pitfalls

by Ashwin Bhat

Claude Agent SDK Development Plugin

by Anthropic

AGENTS.md as project instructions, by one option. Under claude-md-or-agents-md a project with no instruction files of its own gets its AGENTS.md files instead: a prompt.context hook asks $.fs.ancestors for every AGENTS.md and .claude/AGENTS.md from the filesystem root down to the working directory and hands them to the engine as project instruction files, which it renders, announces and withholds from agents exactly as it does CLAUDE.md, skipping any file the engine already loaded by import or link; a tool.call hook on Read attaches the ones under the project root as the engine attaches a nested CLAUDE.md. Under claude-md-and-agents-md every AGENTS.md is loaded beside CLAUDE.md. Under managed-only the project's and the person's instruction files are dropped and the organization's managed ones kept. Under claude-md the engine's walk stands alone. claude-md-or-agents-md is the default.

by William Hu

Migrate your code and prompts from Sonnet 4.x and Opus 4.1 to Opus 4.5.

by Boris Cherny

Automated code review for pull requests using multiple specialized agents with confidence-based scoring

by Anthropic

Streamline your git workflow with simple commands for committing, pushing, and creating pull requests

by Anthropic

The diff pane as a plugin: /diff opens the session's uncommitted changes beside the transcript, file by file with their hunks, refreshed as Claude edits and runs commands; the first edit opens it where the terminal is wide enough, and a file's ask button rides its hunks on the next prompt.