cull

A plugin manager for Claude Code. Cut through the noise — browse, import, and track skills and agents from any public GitHub repo.

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The problem

Every day someone posts "this skill will boost your Claude Code by 10x." There's no standard way to browse what's actually available, compare it to what you already have, import selectively, or track updates.

cull is that layer.

What it does

• /explore — give it any GitHub repo URL (or a name from your tracked sources), and it shows you exactly what capabilities are inside: skills, agents, and hooks. Compared against what you already have locally.
• /import — pick a capability, choose how to adapt it (verbatim copy, light edits, section-by-section, or full rewrite), and it places the file in the right .claude/ directory with a provenance sidecar so you always know where it came from.
• /sync — check all your tracked sources for updates to capabilities you've already imported. Get a per-capability report and decide: apply the update, skip it, or flag for manual review.

Install

/plugin marketplace add https://github.com/liorfranko/cull.git
/plugin install cull

Usage

# See what a repo has to offer
/explore https://github.com/obra/superpowers

# Or use a tracked source name
/explore superpowers

# Import a specific capability
/import superpowers skills/brainstorming/SKILL.md

# Import from any repo
/import https://github.com/wshobson/agents agents/code-reviewer.md

Tracked sources

sources.json ships with five curated starter sources:

Name	Repo	What's in it
superpowers	obra/superpowers	Workflow skills: brainstorm, plan, TDD, debug, code review
wshobson-agents	wshobson/agents	Agent teams, parallel debugging, incident response
everything-claude-code	affaan-m/everything-claude-code	Hooks, agents, session management, rules
anthropics-skills	anthropics/skills	Official Anthropic skills: docx, pdf, pptx, frontend-design, claude-api, mcp-builder
awesome-claude-skills	ComposioHQ/awesome-claude-skills	Curated community collection: skill-creator, langsmith, brand-guidelines and 25+ more

Add your own by editing sources.json.

Provenance tracking

Every imported capability gets an upstream.yaml sidecar:

source:
  repo: obra/superpowers
  path: skills/brainstorming/SKILL.md
  commit: abc123def456
  date: 2026-03-28

adaptation:
  strategy: minimal-patch
  summary: Updated skill references to local paths.
  sections_preserved: ["Overview", "Key Principles"]
  sections_modified: ["Integration"]
  sections_added: []

last_synced: 2026-03-28

You always know where a capability came from, at what commit, and how it was adapted.

Fork it

cull is designed to be forked. The marketplace infrastructure (.claude-plugin/, plugins/, sources.json) is the template — swap in your own skills, point sources.json at your org's repos, and you have a private capability registry for your team.

License

MIT