my-ai-plugins

Universal AI Plugin Marketplace Template

Author AI assistant plugins once and distribute them to all major platforms.

Supported Platforms

Platform	Status
Claude Code	Supported
Cursor	Supported
Gemini CLI	Supported
Kiro	Supported
Vercel Skills CLI	Supported

Quick Start

Create a new plugin

pnpm run scaffold my-plugin

Validate all plugins

pnpm run validate

Build standalone exports

pnpm run build:standalone

This generates standalone directories in dist/ for platforms that require repo-root manifests (Gemini CLI and Kiro).

Repository Structure

ai-plugin-marketplace-template/
├── .claude-plugin/
│   └── marketplace.json              # Claude Code marketplace registry
├── .cursor-plugin/
│   └── marketplace.json              # Cursor marketplace registry
├── plugins/
│   └── <plugin-name>/                # One directory per plugin
│       ├── .claude-plugin/
│       │   └── plugin.json           # Claude Code manifest
│       ├── .cursor-plugin/
│       │   └── plugin.json           # Cursor manifest
│       ├── gemini-extension.json     # Gemini CLI manifest
│       ├── POWER.md                  # Kiro power entry point
│       ├── GEMINI.md                 # Gemini CLI context file
│       ├── .mcp.json                 # MCP config (Claude Code / Cursor)
│       ├── mcp.json                  # MCP config (Kiro)
│       ├── skills/                   # SKILL.md files (universal)
│       ├── agents/                   # Agent definitions (.md)
│       ├── rules/                    # Rules (.md for Claude, .mdc for Cursor)
│       ├── steering/                 # Kiro steering files
│       ├── commands/                 # Commands (.md and .toml)
│       ├── hooks/                    # Hook definitions
│       ├── README.md
│       └── LICENSE
├── src/
│   ├── validate.ts                   # Validate plugins and manifests
│   ├── scaffold.ts                   # Create new plugin from template
│   └── build-standalone.ts           # Generate standalone exports
├── templates/                        # Templates for scaffolding
├── dist/                             # Generated standalone repos (gitignored)
│   ├── gemini/
│   └── kiro/
└── README.md

Platform Compatibility Matrix

Feature	Claude Code	Cursor	Gemini CLI	Kiro	Skills CLI
Skills (SKILL.md)	✓	✓	✓	via steering	✓
Agents (.md)	✓	✓	✓	—	—
Rules	.md	.mdc	—	steering/	—
Hooks	✓	✓	✓	.kiro/hooks/	—
MCP Servers	.mcp.json	.mcp.json	gemini-extension.json	mcp.json	—
Commands	.md	.md/.mdc	.toml	—	—
Marketplace	marketplace.json	marketplace.json	gallery	powers panel	npx skills find
Multi-plugin repo	✓	✓	—	—	✓

How It Works

Platform terminology note: Claude Code and Cursor call these plugins; Kiro calls them powers; Gemini CLI calls them extensions; Vercel calls them skills. This template uses "plugin" as the generic term throughout.

Claude Code and Cursor

These platforms share the same internal layout — skills/, agents/, hooks/, commands/, .mcp.json are identical. Only the manifest wrapper differs (.claude-plugin/ vs .cursor-plugin/).

Plugins are referenced directly from the marketplace.json in the repo.

Gemini CLI and Kiro

Both platforms expect their manifest at the repository root. The build:standalone script copies each plugin into dist/gemini/<name>/ and dist/kiro/<name>/ with the correct root-level structure.

Kiro reads skills via steering context files rather than natively parsing SKILL.md frontmatter. Place skill descriptions in steering/ files so Kiro picks them up automatically.

Kiro does not have a commands concept. Command-like functionality should be expressed via steering files instead.

Vercel Skills CLI

Works out of the box — npx skills add owner/repo auto-discovers all SKILL.md files in the repository.

Example Plugin: skill-evaluator

The included skill-evaluator plugin demonstrates the full multi-platform pattern. It evaluates AI skills across model tiers (opus → sonnet → haiku) using blind sub-agent testing.

See plugins/skill-evaluator/README.md for details.

Creating a Plugin Manually

If you prefer to create a plugin without the scaffold script: