Claude Code’s plugin ecosystem, stuffed into one repo

What it does

Build with Claude is a curated catalog and discovery layer for Claude Code extensions. It ships 117 specialized agents, 175 slash commands, 28 hooks, and assorted skills as Markdown files with YAML frontmatter, while its web UI indexes thousands more community plugins and MCP servers. In practice, it is a pre-packaged prompt library that Claude Code can browse and install natively.

The interesting bit

The entire “platform” is really just a well-organized GitHub repo where every plugin is a Markdown file dropped into a folder. The repo doubles as a native Claude Code marketplace, which means the curation is the actual product: you get pre-written prompts for everything from conventional commits to DevOps troubleshooting without drafting them yourself.

Key highlights

• 117 agents, 175 commands, 28 hooks, plus 26 skills and 51 bundled plugin packages maintained in the repo.
• Indexes 20,000+ community plugins, 4,500+ MCP servers, and 1,100+ external marketplaces through its web UI.
• Web interface at buildwithclaude.com offers filtering, search, and copy-to-clipboard install commands.
• Plugins are categorized across 11 agent types, 22 command types, and 8 hook types, covering version control, security scanning, notifications, and more.
• Contributions are validated with npm test before merge, suggesting at least a basic linting barrier.

Caveats

• The repo is mostly a content collection; the underlying plugins are static Markdown prompts, not compiled code or runtime extensions.
• Discovery numbers for community plugins and MCP servers are indexed externally, and the README does not explain how that indexing stays current or whether it is automated.
• Manual fallback still requires copying files into ~/.claude/ directories, which feels rough compared to the marketplace flow.

Verdict

If you live in Claude Code and are tired of rewriting the same system prompts, this saves you time. If you are looking for a traditional package manager with semantic versioning and dependency resolution, this is not it.