# Quoting Thariq Shihipar

> Source: <https://simonwillison.net/2026/Sep/18/thariq-shihipar/>
> Published: 2026-09-18 19:09:27+00:00

We're adding support for AGENTS.md to Claude Code.

Starting today in version 2.1.277, if there is no CLAUDE.md in a folder, Claude will check for and use AGENTS.md.

AGENTS.md support is built off of Claude Code mods, our upcoming way to customize the Claude Code harness.

This is a built-in mod, but you’ll be able to build custom versions of project instructions yourself as you’d like too.

You can see [the source for the mod here](https://github.com/anthropics/claude-code/tree/main/mods/agents-md)!

— [Thariq Shihipar](https://twitter.com/trq212/status/2101009392611278961), there are [more mods here](https://github.com/anthropics/claude-code/tree/main/mods)

Tags: [thariq-shihipar](https://simonwillison.net/tags/thariq-shihipar), [coding-agents](https://simonwillison.net/tags/coding-agents), [anthropic](https://simonwillison.net/tags/anthropic), [claude-code](https://simonwillison.net/tags/claude-code), [generative-ai](https://simonwillison.net/tags/generative-ai), [ai](https://simonwillison.net/tags/ai), [llms](https://simonwillison.net/tags/llms)