feat: ship Code Jury as a Claude Code plugin

[zzxwill]

Closes #115

What changes

Code Jury can now be installed as a Claude Code plugin, straight from this repository:

claude plugin marketplace add agentsdance/codejury
claude plugin install codejury@codejury

• Marketplace: .claude-plugin/marketplace.json sits at the repository root and lists one plugin, codejury, with source ./plugin.
• Plugin: plugin/.claude-plugin/plugin.json defines it, and it carries two skills:
  • /codejury:review [pr-url ...] [jury flags] runs jury review, falling back to npx -y @agentsdance/codejury when jury isn't installed.
    • It adds --web=false so the command exits when the review is done.
    • It adds --push=false unless the user passes --push, because pushing from a session should be an explicit choice.
    • It runs in the background, then summarizes rounds, findings, verdicts and commits.
    • It is disable-model-invocation: true, so only the user starts it; a review is long and costs agent usage.
  • multi-agent-code-review is the existing skill, moved from skill/SKILL.md. Its links to DESIGN.md, config.example.yaml and prompts/*.md are now GitHub URLs, because an installed plugin is copied without the rest of the repository.
• Separate plugin/ directory: a plugin's bin/ directory goes on the Bash PATH, and claude.ai won't install a plugin that has one. The repository's own bin/jury.js therefore has to stay outside the plugin root.
• No version pin: installs follow the repository, so there's no second version number to keep in step with package.json.
• Docs: a "Claude Code plugin" section in the README Quick start, and a CHANGELOG entry.

Validation

• claude plugin validate ./plugin and claude plugin validate . (Claude Code 2.1.283) both pass. The only warning is the deliberate missing version.
• Under a throwaway HOME, ran claude plugin marketplace add ./, then claude plugin install codejury@codejury, then claude plugin details codejury. It lists both skills, review and multi-agent-code-review.
• New test/plugin.test.js:
  • The marketplace entry name matches the manifest name.
  • The source path exists, and the license matches package.json.
  • The plugin has no bin/ directory.
  • Every skill has name and description, and no skill uses repository-relative paths.
  • Every --flag the review skill names exists in jury help review. I broke one flag name on purpose and the test failed, then passed again once restored.
• npm test: 194 of 195 pass. The one failure, "--judge selects one judge…", only fails in this environment because a real claude CLI is on PATH; it doesn't touch these files.
• npm run test:package passes. The npm package contents are unchanged, since plugin/ isn't in files.

Limitations

• skill/SKILL.md moved to plugin/skills/multi-agent-code-review/SKILL.md, so anyone who copied or symlinked the old path needs to update it.
• The plugin doesn't bundle the CLI or any agent CLIs. It uses jury or npx, and agents are still installed and authenticated separately.

🤖 Generated with Claude Code

https://claude.ai/code/session_01YWwuLax3VBtTJuujgK748c

---

Generated by Claude Code