Agent Plugins

Extensions for Codex, Claude Code, Cursor, and other agent hosts

Plugin

Ponytail

dietrichgebert/ponytail
Development workflow★ 122.9k

Ponytail gives Codex, Claude Code, OpenCode, and other coding agents a minimal-implementation ruleset, six companion Skills, and lifecycle hooks. It prioritizes existing code, standard libraries, and native platform features without removing security, validation, error handling, or accessibility safeguards.

ProjectUser-wideCodexClaude Code
Plugin

Harness v2

revfactory/harness
Multi-agent orchestration★ 9.1k

A community Claude Code plugin that analyzes a project and generates specialized agents, skills, and orchestration rules across workflow, persistent-agent, and one-shot subagent modes.

ProjectMarketplaceClaude Code
Plugin

Power Platform Skills

microsoft/power-platform-skills
Development workflow★ 841

Power Platform Skills is Microsoft's official agent plugin marketplace for Power Pages, Power Apps, Power Automate, and related development workflows in Claude Code and GitHub Copilot CLI.

User-wideProjectClaude CodeGitHub Copilot CLI