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Marketplace Dev

Turns any Claude Code skills repo into an official plugin marketplace — generating, validating, install-testing, and PR-ing marketplace.json.

Dev & CodingAdvanced★ 1,323⑂ 212AI score 8/10Last updated: Aug 8, 2026

What it does

  • Discovers every SKILL.md in a repo, preserves the original frontmatter descriptions, and generates a spec-conforming .claude-plugin/marketplace.json.
  • Teaches the non-obvious rules: $schema is rejected, metadata has only three valid fields, when strict: false is required, reserved marketplace names, and how source shapes the installed cache.
  • Runs a four-step pre-flight via scripts/check_marketplace.sh (JSON syntax, claude plugin validate, source/skills resolution, reverse-sync warning for unregistered skills).
  • Walks through local and GitHub install tests, cache footprint inspection, version-bump maintenance rules, and a PR description template.

Who it's for

  • Maintainers of a Claude Code skills repo who want one-click claude plugin install plus auto-updates.
  • Anyone maintaining an existing marketplace.json who keeps tripping over version/description rules.
  • Open-source contributors sending marketplace-support PRs to someone else's skills repo.

Example uses

  1. "Make my skills repo installable as a plugin marketplace" → it scans skills, confirms categories, writes marketplace.json, and validates.
  2. Validation fails with Unrecognized key: "$schema" or Duplicate plugin name → look up the cause and apply the documented fix.
  3. A newly added skill never updates for users → check metadata.version and per-plugin version bumps, then verify the installed cache path with jq + find.

· · · Install guide · · ·

Try it now, no install

Paste this into Claude to use the skill without installing anything.

Read the instructions in this file and follow them to help me:
https://raw.githubusercontent.com/daymade/claude-code-skills/HEAD/daymade-claude-code/marketplace-dev/SKILL.md

What I want: (describe your task here)

If Claude can't open the link, open it yourself and paste the contents instead.

↓ If it works for you, download the ZIP below and install it. Then it runs on its own — no pasting each time.

Install in the Claude app (no terminal)
  1. Download the ZIP with the button below.
  2. In Claude, open Settings → Capabilities and turn on 'Code execution and file creation'. (one time)
  3. Go to Customize → Skills → + → 'Upload a skill' and upload the ZIP.
↓ Download ZIP
Install in Claude Code

Let Claude do it — paste this into Claude Code

Install the skill I found on Claude Skill Mart.
Copy the daymade-claude-code/marketplace-dev folder from the GitHub repo daymade/claude-code-skills into my ~/.claude/skills/marketplace-dev/.
When it's done, tell me in one line what this skill can do.

Install with a command instead

git clone https://github.com/daymade/claude-code-skills.git /tmp/ccs && mkdir -p ~/.claude/skills && cp -r /tmp/ccs/daymade-claude-code/marketplace-dev ~/.claude/skills/

⚠ This is a third-party skill. Check the source repository before installing.

  1. Open a terminal in a directory you can work in.
  2. Clone the repo: git clone https://github.com/daymade/claude-code-skills.git
  3. Create the skills folder: mkdir -p ~/.claude/skills
  4. Copy just this skill: cp -r claude-code-skills/daymade-claude-code/marketplace-dev ~/.claude/skills/
  5. Make sure the claude CLI is installed (claude --version); jq is needed for the cache inspection step.
  6. Restart Claude Code and ask something like "add marketplace/plugin support to this repo" to trigger the skill.
View source on GitHub ↗License: MIT