# Artificial Intelligence, Development Tools, Software Development

Published articles for Artificial Intelligence, Development Tools, Software Development.

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## Claude Code now also accepts instructions in OpenAI's Agents.md format

DevFeed: [Claude Code now also accepts instructions in OpenAI's Agents.md format](<https://devfeed.tech/articles/claude-code-now-also-accepts-instructions-in-openai-s-agents-md-format-55746.md>)

Original publisher: [Read original article](<https://www.infoworld.com/article/4224410/claude-code-now-also-accepts-instructions-in-openais-agents-md-format.html>)

Author: Anirban Ghoshal

Published: 2026-09-21T15:23:36Z

Content type: news

Language: en

Sources: [InfoWorld](<https://devfeed.tech/sources/infoworld.md>)

Topics: [Claude Code](<https://devfeed.tech/topics/claude-code.md>), [AI Development](<https://devfeed.tech/topics/ai-development.md>), [anthropic](<https://devfeed.tech/topics/anthropic.md>), [AI-assisted coding](<https://devfeed.tech/topics/ai-assisted-coding.md>), [Programming](<https://devfeed.tech/topics/programming.md>), [Markdown](<https://devfeed.tech/topics/markdown.md>), [Artificial Intelligence](<https://devfeed.tech/topics/ai.md>), [software-development](<https://devfeed.tech/topics/software-development.md>), [Code](<https://devfeed.tech/topics/code.md>), [Claude](<https://devfeed.tech/topics/claude.md>), [OpenAI](<https://devfeed.tech/topics/openai.md>), [Open Source](<https://devfeed.tech/topics/open-source.md>)

Tags: [agent](<https://devfeed.tech/tags/agent.md>), [agentic-ai](<https://devfeed.tech/tags/agentic-ai.md>), [agents](<https://devfeed.tech/tags/agents.md>), [agents-md](<https://devfeed.tech/tags/agents-md.md>), [ai-coding](<https://devfeed.tech/tags/ai-coding.md>), [ai-coding-agents](<https://devfeed.tech/tags/ai-coding-agents.md>), [ai-development](<https://devfeed.tech/tags/ai-development.md>), [anthropic](<https://devfeed.tech/tags/anthropic.md>), [artificial-intelligence](<https://devfeed.tech/tags/artificial-intelligence.md>), [artificial-intelligence-development-tools-software-development](<https://devfeed.tech/tags/artificial-intelligence-development-tools-software-development.md>), [claude](<https://devfeed.tech/tags/claude.md>), [claude-code](<https://devfeed.tech/tags/claude-code.md>), [code](<https://devfeed.tech/tags/code.md>), [coding](<https://devfeed.tech/tags/coding.md>), [coding-agents](<https://devfeed.tech/tags/coding-agents.md>), [developers](<https://devfeed.tech/tags/developers.md>), [development](<https://devfeed.tech/tags/development.md>), [development-tools](<https://devfeed.tech/tags/development-tools.md>), [maintenance](<https://devfeed.tech/tags/maintenance.md>), [markdown](<https://devfeed.tech/tags/markdown.md>), [open-source](<https://devfeed.tech/tags/open-source.md>), [openai](<https://devfeed.tech/tags/openai.md>), [repository](<https://devfeed.tech/tags/repository.md>), [software-development](<https://devfeed.tech/tags/software-development.md>)

### AI overview

Anthropic's Claude Code now supports AGENTS.md, the instruction-file format used by OpenAI's Codex and other coding agents. This lets developers share project-specific instructions across tools instead of maintaining separate files.

### Source excerpt

One thing that made it difficult for developers to switch AI coding tools on a project is that Anthropic's Claude Code didn't look for instructions in the same place as other agents including OpenAI's Codex -- but now that's changing. Claude and Codex each accept instructions in markdown format, a plain-text way of giving AI coding agents project-specific behavioral instructions. Until now, Claude Code looked for project-specific instructions in a file named CLAUDE.md by default, while Codex and other agents use AGENTS.md, the format of which is an open source initiative governed by the Agentic AI Foundation, an initiative under the Linux Foundation. But now, as Thariq Shihipar, a member of Anthropic's technical staff, wrote in a post on X on Friday, "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," That means developers using multiple coding tools alongside Claude Code can now use the same project instructions across those agents, rather than maintaining separate instruction files for Claude and for everything else. Developers will no longer have to maintain the same or similar instructions in two files, nor to ensure that any change to a project's coding conventions, build commands or other agent instructions are updated in two locations, a system that created additional maintenance work and left room for the instructions to fall out of sync. Instead, they can use AGENTS.md as a common instruction file across their coding tools, provided there is no CLAUDE.md file in the project. AGENTS.md support could reduce operational burden For Amit Kumar Jena, AI development head at IT consulting firm Kanerika, being able to use AGENTS.md with Claude Code could "remove some real busywork" for development teams working with multiple coding tools. "Before, when Claude only read CLAUDE.md, any team running multiple coding agents on the same repository had to keep