A README is the main repository document that explains what a project does, how to install it, and how to use it. In software development, it is the first place people and automated tools look for context, setup steps, and expected behavior.
In cyber security, README files matter because they shape trust. Attackers can use a polished README to make a malicious repository look legitimate, especially when paired with familiar naming, installation commands, or registry listings. In AI-driven workflows, agents may follow README instructions automatically, which can turn documentation into part of the attack path. Defenders should treat READMEs as untrusted content until the code, publisher, and dependencies are verified. Reviewing installation commands, checking for unusual scripts, and limiting what sources automation may follow helps reduce supply-chain risk.