# Claude Code 2.1.277 adds official support for agents.md configuration files

Digest AI · Agents & Tools · published 2026-09-18T16:40:00Z

Canonical: https://digestai.news/story/claude-code-2-1-277-adds-official-support-for-agents-md-configuration

## Summary

Claude Code version 2.1.277 has introduced official support for the AGENTS.md configuration file, allowing users to choose from four distinct modes to manage project instructions. Previously, developers had to manually import AGENTS.md into CLAUDE.md or use symbolic links. The default setting reads AGENTS.md only when no CLAUDE.md file is present, meaning existing repositories will see no immediate changes. Users must configure this setting via `~/.claude/settings.json` or `/config` rather than the project's local `settings.json` file.

Other notable developments include MiniMax releasing its own coding CLI as open-source software under the MIT license. MiniMax claims its tool achieved 76.7% on its own FrontierHarness Eval benchmark, outperforming Codex at 66.7% and Claude Code at 63.3%. However, these tests were not standardized or verified by a third party, and the MiniMax run utilized Kimi's China API while competitors used public baselines.

## Key points

- Claude Code 2.1.277 officially reads AGENTS.md files using four configurable modes.
- MiniMax released an open-source coding CLI under the MIT license.
- MiniMax's CLI benchmark claims 76.7% success, but tests were not third-party verified.

## Why it matters

The updates show a shift in AI development from model intelligence to external execution environments, giving developers more control over how AI agents interact with local files, browser extensions, and operating systems.

## Sources

1. [9/19 Top 5 AI Trends This Morning | Claude Code Officially Supports AGENTS.md, ChatGPT Controls Home PC](https://note.com/piske_cc/n/na634ac4e3453?hl=en) (note.com, 2026-09-18)

## Cite

Digest AI, "Claude Code 2.1.277 adds official support for agents.md configuration files", 18 September 2026, https://digestai.news/story/claude-code-2-1-277-adds-official-support-for-agents-md-configuration

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