CopilotKit

CopilotKit's APIs move. Anything written down in a skill file is a copy that starts drifting the day it is written, so this skill carries almost no API detail on purpose. It tells you where the current answer lives and how to get it.

Look it up before you write code. Not because the docs are more convenient, but because they are regenerated from the source and a recollection is not.

Reading the docs

There are two ways to read the current docs. Check which one this session has.

Without the MCP server: fetch the Markdown pages

This path always works. It needs only a way to fetch a URL.

• Any docs page as Markdown. Add .md to the page path: https://docs.copilotkit.ai/<path>.md. For example, https://docs.copilotkit.ai/quickstart.md and https://docs.copilotkit.ai/backend/copilot-runtime.md. The response is text/markdown. A path that does not exist returns 404 with the body Not found.
• To find a path. Start with https://docs.copilotkit.ai/llms.txt. It is a short, curated index with links to the main pages. For a page it does not list, read https://docs.copilotkit.ai/sitemap.xml, which lists every page URL. Both indexes list HTML page URLs. Add .md to a URL before you fetch it. The site root has no .md form. Do not fetch llms-full.txt in one read. It holds every page and is several megabytes.
• Links in this skill. A link such as quickstart is a docs path. Fetch it as https://docs.copilotkit.ai/quickstart.md.
• Library source. Read the installed package in node_modules/@copilotkit/, or the source at https://github.com/CopilotKit/CopilotKit under packages/.
• AG-UI protocol. The protocol has its own docs at https://docs.ag-ui.com. Its index is https://docs.ag-ui.com/llms.txt, and its pages also take .md.

With the MCP server: search tools