Using AGENTS.md as a project brief for AI coding agents

On November 10, 2026, DEV Community's AI section published an article titled "Writing Project Briefs for AI Coding Agents with AGENTS.md". The author describes developing Yonto Player, a media player for your own library on Android TV, phones and tablets, with AI coding agents. The author explains that agents start every session knowing nothing about the repo, so the file they read first shapes much of what they do next. That first file sits at the repository root and is called AGENTS.md, and the author says more work has gone into editing it than into almost any other file. The article is part of a series: the opening post offered a rough sketch of this root file, while this installment goes deeper into what belongs in it, what stays out, and how it should be written. The author's approach treats AGENTS.md as a contract with AI coding agents that answers four questions: what the project is, how the code is laid out, how work is checked once done, and which existing structures must not be broken. Root-level content is limited to briefs that nearly every task will need, while task-specific details live in deeper documents whose locations are named in the root file. No other reports have surfaced to add to or contradict this account.