4 free resources on this topic. Everything here is free and hand-picked. You can also search within this topic.
Anthropic's directory of connectors and plugins that link Claude to external tools, data sources, and services.
A free, open-source tool for running and monitoring multiple AI coding agents from one place, with a plugin ecosystem and documentation for the agent CLIs it supports.
From the site: Run them anywhere. Leave them running. Herdr holds real terminals open so your agents keep working when you close the laptop, and gets you back in from any tty.
Why I recommend it: Open source with an active plugin community — useful if you are experimenting with more than one AI coding tool.
A technical design paper by Alice Poteat (Anthropic, August 2026) setting out how function hooks let plugins extend Claude Code — the event model, composition order, rendering and enterprise controls.
Why I recommend it: Advanced and unapologetically technical. Read it as an example of a clear design document as much as for the AI tooling itself.
The public GitHub discussion where Anthropic and the community designed function hooks — a way for plugins to extend Claude Code — including the shipped design decisions and community feedback.
Why I recommend it: A rare look at how an AI product feature gets designed in public. Useful if you want to see how technical feedback is actually written.
