Guide
Claude Code plugins and marketplace: 40 profiled in 2026
We profiled 40 Claude Code plugins, all from Anthropic. The largest group is 12 language server plugins that add code intelligence and diagnostics, such as typescript-lsp, pyright-lsp, gopls-lsp and rust-analyzer-lsp. The rest are workflow tools: code-review, pr-review-toolkit, feature-dev, commit-commands, hookify, ralph-loop and security-guidance.
There are also builder kits (plugin-dev, mcp-server-dev, agent-sdk-dev), two output-style plugins (explanatory-output-style, learning-output-style) and report tools (session-report, receipts). Most are Apache-2.0; claude-security is listed as proprietary. Anthropic warns to trust a plugin before installing, since it cannot verify the MCP servers, files or software a plugin includes.
- Official 40
How it works
- A plugin bundles slash commands, agents, skills, hooks or MCP server config into one installable unit.
- The official marketplace, claude-plugins-official, ships enabled by default in Claude Code; browse it with /plugin > Discover.
- Install with /plugin install <name>@claude-plugins-official, for example code-review@claude-plugins-official.
- Language server plugins need the matching language server on your machine; clangd-lsp, for example, is for .c files.
- Plugins can run hooks, so read the README first; ralph-loop uses a Stop hook and explanatory-output-style uses a SessionStart hook.
How a plugin is installed and configured
Official plugins come from the Anthropic marketplace; third-party ones are added by marketplace URL first. Each entry below shows the exact command from its README.
File: Terminal: /plugin · manifest .claude-plugin/plugin.json
# add a marketplace once, then install by name
/plugin marketplace add <owner>/<repo>
/plugin install <plugin-name>@<marketplace-name>
# example from the official marketplace
/plugin install commit-commands@claude-plugins-official
# minimal manifest in the plugin repo
.claude-plugin/plugin.json
{ "name": "my-plugin", "version": "1.0.0", "description": "What it adds" }The list (40)
| Name | Author | Works with | License | Status | Source |
|---|---|---|---|---|---|
| Agent SDK Development Plugin Scaffolds new Claude Agent SDK apps in Python or TypeScript and verifies them against bes… |
Anthropic official | Claude Code | Apache-2.0 | maintained | github.com ↗ |
| C# LSP C# language server for Claude Code: code intelligence and diagnostics for .cs files. |
Anthropic official | Claude Code | Apache-2.0 | maintained | github.com ↗ |
| clangd LSP C/C++ language server for Claude Code: code intelligence and diagnostics for .c files. |
Anthropic official | Claude Code | Apache-2.0 | maintained | github.com ↗ |
| Claude Code Setup Scans a codebase and recommends tailored Claude Code automations: hooks, skills, MCP serv… |
Anthropic official | Claude Code | Apache-2.0 | maintained | github.com ↗ |
| Claude Security In-session deep vulnerability scanning with every finding challenged by verifiers, plus v… |
Anthropic official | Claude Code | Proprietary (see LICENSE) | maintained | github.com ↗ |
| CLAUDE.md Management Audit CLAUDE.md quality, keep it aligned with the codebase, and capture session learnings… |
Anthropic official | Claude Code | Apache-2.0 | maintained | github.com ↗ |
| Code Modernization Guided modernization of legacy codebases: assess, map, extract rules, plan, rebuild, and … |
Anthropic official | Claude Code | Apache-2.0 | maintained | github.com ↗ |
| code-review Automated PR code review with 4 parallel agents and confidence scoring (threshold 80). |
Anthropic official | Claude Code | Apache-2.0 | maintained | github.com ↗ |
| code-simplifier Agent that simplifies code for clarity and maintainability while preserving behaviour. |
Anthropic official | Claude Code | Apache-2.0 | maintained | github.com ↗ |
| commit-commands Slash commands for git commit, push and PR creation in one step. |
Anthropic official | Claude Code | Apache-2.0 | maintained | github.com ↗ |
| CWC Makers One-command onboarding for the Code-with-Claude Makers M5Stack Cardputer kit: clone, flas… |
Anthropic official | Claude Code | Apache-2.0 | maintained | github.com ↗ |
| document-skills Collection of document skills: Excel, Word, PowerPoint and PDF. |
Anthropic official | Claude Code | — | maintained | github.com ↗ |
| Example Plugin Reference plugin showing skills, legacy commands and MCP server config for Claude Code pl… |
Anthropic official | Claude Code | Apache-2.0 | maintained | github.com ↗ |
| example-skills Collection of example skills: skill-creator, MCP builder, design, algorithmic art, comms,… |
Anthropic official | Claude Code | — | maintained | github.com ↗ |
| explanatory-output-style SessionStart hook adding educational insights on implementation choices (replaces depreca… |
Anthropic official | Claude Code | Apache-2.0 | deprecated | github.com ↗ |
| feature-dev 7-phase guided feature development workflow with exploration, architecture and review age… |
Anthropic official | Claude Code | Apache-2.0 | maintained | github.com ↗ |
| gopls LSP Go language server for Claude Code: code intelligence and diagnostics for .go files. |
Anthropic official | Claude Code | Apache-2.0 | maintained | github.com ↗ |
| hookify Create Claude Code hooks from markdown rule files or from conversation patterns, no hooks… |
Anthropic official | Claude Code | Apache-2.0 | maintained | github.com ↗ |
| jdtls LSP Java (Eclipse JDT.LS) language server for Claude Code: code intelligence and diagnostics … |
Anthropic official | Claude Code | Apache-2.0 | maintained | github.com ↗ |
| Kotlin LSP Kotlin language server for Claude Code: code intelligence and diagnostics for .kt files. |
Anthropic official | Claude Code | Apache-2.0 | maintained | github.com ↗ |
| Learning Output Style SessionStart hook that makes Claude ask you to write 5-10 lines at decision points and sh… |
Anthropic official | Claude Code | Apache-2.0 | maintained | github.com ↗ |
| Lua LSP Lua language server for Claude Code: code intelligence and diagnostics for .lua files. |
Anthropic official | Claude Code | Apache-2.0 | maintained | github.com ↗ |
| Math Olympiad Solves competition math (IMO, Putnam, USAMO) with context-isolated adversarial proof veri… |
Anthropic official | Claude Code | Apache-2.0 | maintained | github.com ↗ |
| Math Proof Two skills for research-level math: solo (single session) and siege (hours of judge and w… |
Anthropic official | Claude Code | Apache-2.0 | maintained | github.com ↗ |
| MCP Server Dev Three skills for designing and building MCP servers: remote HTTP, MCP apps with UI widget… |
Anthropic official | Claude Code | Apache-2.0 | maintained | github.com ↗ |
| MCP Tunnels Walks you through connecting Claude to a private MCP server via an Anthropic MCP tunnel u… |
Anthropic official | Claude Code | Apache-2.0 | maintained | github.com ↗ |
| PHP LSP (Intelephense) PHP (Intelephense) language server for Claude Code: code intelligence and diagnostics for… |
Anthropic official | Claude Code | Apache-2.0 | maintained | github.com ↗ |
| Playground Creates self-contained HTML playgrounds with controls, live preview and a copyable prompt… |
Anthropic official | Claude Code | Apache-2.0 | maintained | github.com ↗ |
| plugin-dev Toolkit with 7 skills and /plugin-dev:create-plugin for building Claude Code plugins. |
Anthropic official | Claude Code | Apache-2.0 | maintained | github.com ↗ |
| pr-review-toolkit Six review agents: comments, tests, error handling, type design, code quality, simplifica… |
Anthropic official | Claude Code | Apache-2.0 | maintained | github.com ↗ |
| Project Artifact Builds and publishes a living tabbed status page for a multi-workstream project, refreshe… |
Anthropic official | Claude Code | Apache-2.0 | maintained | github.com ↗ |
| Pyright LSP Python (Pyright) language server for Claude Code: code intelligence and diagnostics for .… |
Anthropic official | Claude Code | Apache-2.0 | maintained | github.com ↗ |
| ralph-loop Self-referential loops via a Stop hook: same prompt repeated until a completion promise. |
Anthropic official | Claude Code | Apache-2.0 | maintained | github.com ↗ |
| Receipts Generates a local Claude Code impact report from your own session transcripts: what shipp… |
Anthropic official | Claude Code | Apache-2.0 | maintained | github.com ↗ |
| Ruby LSP Ruby language server for Claude Code: code intelligence and diagnostics for .rb files. |
Anthropic official | Claude Code | Apache-2.0 | maintained | github.com ↗ |
| rust-analyzer LSP Rust language server for Claude Code: code intelligence and diagnostics for .rs files. |
Anthropic official | Claude Code | Apache-2.0 | maintained | github.com ↗ |
| security-guidance Security review for Claude-written code: pattern warnings, LLM diff review on Stop, agent… |
Anthropic official | Claude Code | Apache-2.0 | maintained | github.com ↗ |
| Session Report Generates an explorable HTML report of Claude Code token, cache and subagent usage from l… |
Anthropic official | Claude Code | Apache-2.0 | maintained | github.com ↗ |
| Swift LSP (SourceKit-LSP) Swift (SourceKit-LSP) language server for Claude Code: code intelligence and diagnostics … |
Anthropic official | Claude Code | Apache-2.0 | maintained | github.com ↗ |
| TypeScript LSP TypeScript/JavaScript language server for Claude Code: code intelligence and diagnostics … |
Anthropic official | Claude Code | Apache-2.0 | maintained | github.com ↗ |
Frequently asked questions
How do I install a Claude Code plugin?
Use /plugin install <name>@claude-plugins-official, for example code-review@claude-plugins-official, or browse the official marketplace with /plugin > Discover.
Which plugin reviews pull requests?
code-review runs 4 parallel agents, scores issues 0-100 and posts only those at 80 or above. pr-review-toolkit adds six review agents for comments, tests, error handling, type design, code quality and simplification.
Which plugins help me build my own plugin or MCP server?
plugin-dev has 7 skills and a /plugin-dev:create-plugin command. mcp-server-dev has three skills for designing and building MCP servers, and agent-sdk-dev scaffolds Claude Agent SDK apps.