AGENTS.md best practices for coding agents (ANSWERED)
AGENTS.md is becoming the de facto 'README for agents.'
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What belongs in AGENTS.md, why concise files win, company-wide templates, and securing agent config against repo attacks.
AGENTS.md is becoming the standard onboarding file for coding agents — a README written for Claude Code, Cursor agents, Codex CLI, and internal runtimes.
Interviews ask what belongs in the file, how to keep it short, how to roll it out across hundreds of repos, and how to stop attackers from poisoning AGENTS.md or related configs (.mcp.json, .cursor/rules).
Research nuance to cite: AGENTS.md is valuable when concise and focused; oversized instruction dumps can raise cost and hurt success rates. This guide covers best practices and secure AGENTS.md — high-signal topics for AI tooling and platform roles.
AGENTS.mdBest PracticesSecurityContext Engineering
Questions in this guide
Deep explanations with architecture diagrams for every question below.
Secure AGENTS.md and repository config attacks (EXPLAINED)
Repository configuration attacks target the files agents trust.
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