Plugin Marketplace Setup

What it does

When your agent uses it

• Setting up a marketplace
• Distributing skills/plugins to a team
• Private registry
• Skills.sh publishing

Example prompts

• “Use the plugin-marketplace-setup skill to design public or private Agent Skill and plugin marketplaces for Cursor, Claude Code, Codex, Zed, Open…”
• “/plugin-marketplace-setup”

Requirements

• Node.js
• A credential in GITHUB_TOKEN
• A credential in GITLAB_TOKEN

Workflow steps

6 steps, taken from the first numbered list in SKILL.md.

1. 1Repo access — team can git clone (HTTPS token, SSH, or GHE app for Cursor team marketplaces).
2. 2Secrets — never commit tokens; document GITHUB_TOKEN / GITLAB_TOKEN for Claude auto-update on private marketplaces.
3. 3Install docs — one README block per channel (skills CLI vs Claude /plugin vs Cursor dashboard).
4. 4Versioning — bump version in plugin manifest per release; skills use git SHA via npx skills update.
5. 5CI — validate skills (pnpm run validate / dart run :steward validate in Skill Steward); product repos add contract tests.
6. 6Scope — project install (committed .agents/skills/) vs -g global; document team norm.

What it can do on your machine

Read from SKILL.md and the folder at commit 62f3ee1. It shows what the files ask for, not the result of running them.

• Tool permissions

  Pre-approves nothing: there is no allowed-tools line, so your agent's usual permission prompts apply.

  From allowed-tools in the SKILL.md frontmatter.

• Runs code

  Shell commands in SKILL.md call:

  • npx
  • pnpm
  • codex
  • git
  • dart

  From the folder's file list and the shell code blocks in SKILL.md.

• Network

  Links to these hosts (documentation or services it may open):

  • skills.sh
  • agentskills.io
  • cursor.com
  • code.claude.com
  • github.com

  From URLs in SKILL.md, links to its own repository left out.

• Credentials

  Names these keys or tokens, usually read from environment variables:

  • GITHUB_TOKEN
  • GITLAB_TOKEN

  From names ending in _API_KEY, _TOKEN, _SECRET, _KEY or _PASSWORD in SKILL.md.

Context cost

Plugin Marketplace Setup loads about 2.9k tokens when it runs, and up to ~5k if it reads all its reference files. Until then it costs about 100 tokens; SKILL.md has 954 words of instructions outside code blocks.

Always · name and description, kept in context so the agent knows when to use it

~100

When it runs · the whole SKILL.md, loaded when a task matches

~2.9k

With references · SKILL.md plus every file in references/, read only if the agent opens them

~5k

Estimates: characters ÷ 4, the usual rule of thumb; real counts depend on the model's tokenizer. Scripts and assets cost tokens only if the agent reads them.

Safety

Automated static check — not a guarantee. Review scripts before installing. It scans the text of SKILL.md for risky patterns (piping downloads into a shell, reading credential files, hidden Unicode, destructive commands); files beside SKILL.md are not scanned.

SKILL.md

The full file from Arenukvern/mcp_flutter at commit 62f3ee1, republished under its MIT licence (© Arenukvern). 954 words, ~2,862 tokens.

name

plugin-marketplace-setup

description

Designs public or private Agent Skill and plugin marketplaces for Cursor, Claude Code, Codex, Zed, Open Plugin, and npx skills—manifest layout, install matrix, and Skill Steward vs product boundaries. Use when setting up a marketplace, distributing skills/plugins to a team, private registry, .cursor-plugin, .codex-plugin, .plugin, .claude-plugin, or skills.sh publishing.

license

MIT

type

governance

metadata.author

skill-steward

metadata.version

1.0.0

metadata.category

marketplace

npx skills add owner/repo                    # all skills, project scope
npx skills add owner/repo --skill my-skill   # one skill
npx skills add owner/repo -a cursor -a claude-code -a codex -a zed -y
npx skills add owner/repo -g                 # global (~/.agents/skills/)
npx skills add owner/repo --copy             # copy instead of symlink

my-skills/
├── skills/
│   └── my-skill/
│       └── SKILL.md
├── skills.sh.json          # optional: skills.sh categories
├── README.md               # install commands
└── package.json            # optional: pnpm run validate

my-marketplace/
├── .agents/plugins/
│   └── marketplace.json    # Codex catalog
├── .claude-plugin/
│   └── marketplace.json    # Claude catalog, when needed
├── .cursor-plugin/
│   └── marketplace.json    # Cursor catalog, when needed
└── plugins/
    └── my-plugin/
        ├── .plugin/plugin.json
        ├── .codex-plugin/plugin.json
        ├── .claude-plugin/plugin.json
        ├── .cursor-plugin/plugin.json
        ├── skills/
        ├── hooks/
        └── .mcp.json

plugins/my-hook-pack/
├── plugin.yaml
├── README.md               # manual .cursor/hooks.json steps
├── hooks.json.snippet
└── hooks/

npx skills add arenukvern/skill_steward --skill plugin-marketplace-setup

© Arenukvern, MIT. Rendered from Markdown: HTML in the file is shown as text, images as links, and headings moved down two levels. Raw file

Files

SKILL.md and 6 other files (references) in .agents/skills/plugin-marketplace-setup of Arenukvern/mcp_flutter.

• SKILL.md
• evals/cases/adr-plan-dormant.yaml
• evals/cases/private-marketplace-trigger.yaml
• references/distribution-matrix.md
• references/evals.md
• references/manifest-snippets.md
• references/sources.md

Open the folder on GitHubat commit 62f3ee1