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AGENTS.md vs CLAUDE.md vs .cursor/rules: which file does your AI agent read?

This story is from 2026-10-21. It is preserved in the archive; the latest stories are on the live feed.

Different AI coding tools look for different instruction files. If you only keep rules in one tool's format, the others guess. If you copy the same wall of text into every format, the copies drift. This guide maps what each file is for, and a setup that stays maintainable. The short answer AGENTS.m…

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  1. 2026-10-21 01:56 · DEV Community — AI
    AGENTS.md vs CLAUDE.md vs .cursor/rules: which file does your AI agent read?

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