A Single AGENTS.md File Can Dramatically Improve AI Agent Behavior

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A developer has shared that their most effective AI workflow requires no complex infrastructure — just one file. The file, named AGENTS.md, acts as a behavioral contract that instructs the AI agent on how to operate within a given repository. It contains a simple list of rules the agent reads before beginning any task. No frameworks, prompt libraries, or fine-tuning are involved. According to the developer, this minimal approach eliminates much of the unwanted or erratic behavior commonly seen in AI agents.

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