github-pr-plugins
A cross-tool plugin marketplace that targets both Claude Code and the OpenAI Codex CLI from a single repository. Future support for IDE plugins is planned once the CLI side is stable.
Status: scaffolding only. The repo currently ships a single placeholder plugin (melody-say-hello) used to verify that both CLIs can discover and load plugins from this repository. Real functionality will land in subsequent commits.
Repository layout
.
├── .claude-plugin/
│ └── marketplace.json # Claude Code marketplace index
├── .agents/
│ └── plugins/
│ └── marketplace.json # Codex CLI marketplace index
├── plugins/
│ └── melody-say-hello/ # First placeholder plugin
│ ├── .claude-plugin/plugin.json
│ ├── .codex-plugin/plugin.json
│ ├── .mcp.json
│ ├── skills/melody-say-hello/SKILL.md
│ └── README.md
├── scripts/validate.mjs # Local schema validator (also used in CI)
├── .github/workflows/validate.yml
├── README.md
├── LICENSE
└── .gitignore
The two marketplace.json files are kept in sync by hand — they describe the same plugin set in the two CLI-specific dialects. The per-plugin plugin.json files share a near-identical schema but live in different directories so each CLI can discover them.
The skills/ directory and .mcp.json are 100% schema-compatible across both CLIs, so they live as a single source of truth inside each plugin.
Installation
Claude Code
/plugin marketplace add DZG-MELODY/github-pr-plugins
/plugin install melody-say-hello@github-pr-plugins
After install, invoke the demo skill: melody-say-hello:melody-say-hello.
OpenAI Codex CLI
codex plugin marketplace add DZG-MELODY/github-pr-plugins
# Enable the plugin if Codex prompts you, or set
# [plugins.melody-say-hello]
# enabled = true
# in ~/.codex/config.toml
After install, invoke the demo skill: melody-say-hello.
Local development
Run the validator before opening a PR:
npm install --no-save ajv@^8 ajv-formats@^3 gray-matter@^4
node scripts/validate.mjs
The validator checks:
- Both
marketplace.json files against minimal embedded schemas.
- Every plugin's Claude and Codex manifest.
- Every
SKILL.md frontmatter (name, description, and that name matches the parent directory).
- That each marketplace entry's relative
source path actually exists.
The same script runs in CI on every push and pull request (.github/workflows/validate.yml).
Roadmap
References
License
MIT
JuliusBrussee
anthropics
wshobson
thedotmack
