cwork101 / ecosystem

Ecosystem directory

Everything built on top of Claude that is worth knowing about — kept in one index, with official Anthropic projects and independent community projects clearly separated.

OfficialBuilt and maintained by Anthropic.PartnerMaintained by a documented Anthropic partner.CommunityIndependent project. Not affiliated with Anthropic.

Command-line tools

anthropics/claude-code

Official

The Claude Code repository — source, issue tracker, and the fastest route to reporting a bug or checking whether one is already known.

Anthropic · verified Aug 21, 2026

Communities

Anthropic Discord

Official

The official community server, and the place a problem gets discussed before it reaches documentation — which is exactly why anything from it is a Tier 4 report.

Anthropic · verified Aug 21, 2026

Directories

Agent Skills (agentskills.io)

Official

The open standard site for the Agent Skills format — specification, quickstart, and a showcase of the agents outside Anthropic that support it.

Originally Anthropic; open to ecosystem contributions · verified Aug 21, 2026

modelcontextprotocol.io

Official

The Model Context Protocol's own site — the specification, the SDKs, and the client and server documentation that sit above any one vendor's implementation.

The Model Context Protocol project, originated at Anthropic · verified Aug 21, 2026

Claude Code plugin marketplaces

Official

The distribution layer for Claude Code plugins — anyone can publish a marketplace, and organisations can steer which plugins their developers see.

Anthropic (the mechanism); marketplaces themselves are run by whoever publishes them · verified Aug 21, 2026

Claude Code documentation index (llms.txt)

Official

A machine-readable index of every Claude Code documentation page — the fastest way to find out whether a feature is documented at all.

Anthropic · verified Aug 21, 2026

Frameworks

Claude Cookbooks

Official

Anthropic's collection of 150+ working recipes — agent patterns, tool use, RAG, evals, caching and cost optimisation — as runnable notebooks rather than prose.

Anthropic · verified Aug 21, 2026

Agents outside Anthropic that support Agent Skills

Community

Third-party coding agents and assistants that have adopted the Agent Skills format, making a skill you write portable beyond Claude.

Various, independent of Anthropic · verified Aug 21, 2026

MCP servers

MCP reference servers

Official

The official collection of Model Context Protocol reference implementations, plus pointers to community-built servers.

Anthropic, with community contributions · verified Aug 21, 2026

Skills

anthropics/skills

Official

Anthropic's public repository of Agent Skills — the reference examples, the format specification, a skill template, and the document skills that power Claude's file capabilities.

Anthropic · verified Aug 21, 2026

Submitting a project

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