LaunchDevelopersSeptember 18, 2026

Claude Code 2.1.277 adds AGENTS.md support

Read original source →simonwillison.net

Starting in version 2.1.277, Claude Code checks for and uses AGENTS.md when no CLAUDE.md exists in a folder. The support is built as a built-in mod off Claude Code mods, an upcoming way to customize the harness.

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