Plugins, agents, and skills for AI coding tools

Use one collection of plugins, agents, skills, and commands across Claude Code, OpenAI Codex CLI, Cursor, OpenCode, Antigravity CLI, GitHub Copilot, and Pi. A harness is the coding tool that loads and runs the components.

Contributors write each component once, in Markdown, in the Claude Code plugin format. Adapters under tools/adapters/ generate the format each harness reads, map model aliases to that harness's models, and translate tool permissions where the harness supports them. CI regenerates the artifacts for every harness, validates them, and runs the OpenCode, Antigravity CLI, and Pi artifacts through their installed CLIs. The capability matrix lists what each harness supports, and ARCHITECTURE.md describes the design.

The catalog contains 94 plugins, including 92 local plugins and 2 external entries. The local source contains 202 agents, 185 skills, and 105 commands. Plugins cover Python and JavaScript development, code review, testing, infrastructure, security, and other work.

Multi-harness support

Choose the harness you use and follow its setup route. Available components depend on the installation route and the harness's capabilities.

Tool	Installation	Components and limits
Claude Code	Plugin marketplace	Source agents, skills, and commands; plugin-specific hooks and MCP configuration
OpenAI Codex CLI	Native marketplace or generated artifacts	Native source skills; generated TOML agents and commands as skills use a separate route
Cursor	Plugin marketplace	Source agents, skills, and commands, with curated project rules
OpenCode	make install-opencode	Generated agents, skills, and commands, with translated tool permissions
Antigravity CLI	make install-antigravity	Generated plugins containing agents, skills, and commands
GitHub Copilot	make install-copilot	Generated agent profiles and skills; commands also become invocable skills
Pi	make install-pi	Generated skills and prompt templates; agents require a subagent extension

See the capability matrix for model mappings, tool permissions, hooks, and installation differences.

For individual skills, use a skills-only installer and select your coding tool.

How it works

A plugin groups related agents, skills, and commands under plugins/. For example, python-development contains three agents, sixteen skills, and a scaffolding command. The chosen harness loads the installed components according to its own discovery and invocation rules.

Contributors maintain one Markdown source in the Claude Code plugin format. Native registries point to that source where supported, and adapters generate the formats needed by each harness. Commands may become skills or prompt templates, and agent formats, model choices, and tool permissions vary by harness.

Source agents specify model aliases such as opus, sonnet, haiku, fable, or inherit. Adapters map those aliases to each harness's model settings, including fixed defaults for some inherit entries. See model configuration and the adapter mappings.

Quality evaluation

The repository validates plugin structure, generated artifacts, and documentation. Contributors can run these checks from the repository root:

make generate-all
make validate STRICT=1
make garden

plugin-eval also provides static skill checks without model calls. For example:

uv run --project plugins/plugin-eval plugin-eval score plugins/python-development/skills/python-testing-patterns --depth quick

The LLM judge and Monte Carlo layers are experimental and are not validated against human labels. Their scores describe model assessments and repeated simulations and do not prove that a task succeeds in a project. They require the optional llm dependencies. Model calls use ANTHROPIC_API_KEY when it is set and bill that API account. Otherwise they use your Claude Code login. See the evaluation guide for setup and limits.

Quick start

Choose a plugin for the work you do:

Plugin	Use it for
python-development	Python, Django, FastAPI, testing, and packaging
javascript-typescript	JavaScript and TypeScript development and project setup
developer-essentials	Code review, debugging, Git, and testing patterns
security-scanning	Security review, dependency checks, and code scanning

See the plugin catalog for all 94 plugins and the usage guide for commands and examples.

Claude Code

Run these commands inside Claude Code to register the marketplace and install the Python development plugin:

/plugin marketplace add wshobson/agents
/plugin install python-development@claude-code-workflows

Then ask Claude to use the Python agents for your task, or run the plugin's scaffolding command:

/python-development:python-scaffold Create a FastAPI service with tests

Codex CLI

Run these commands in a terminal with a current Codex CLI:

codex plugin marketplace add wshobson/agents
codex plugin add python-development@claude-code-workflows

The native Codex manifests expose source skills. The generated TOML agents and command-derived skills use a separate adapter path. Native installation also reads the original skill bodies, while generated copies split oversized bodies into reference files for the 8 KB budget. See the Codex setup details before choosing an installation route.

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