Create AGENTS.md

Write AGENTS.md files that tell coding agents what to do, what to ask about first, what never to do, and how to prove their work — derived from the code that is actually in the repository, never copied from another project. An AGENTS.md is an instruction set, not documentation: every sentence directs, constrains, or gives a step-by-step procedure.

Input — a target directory (repo root by default) or an existing AGENTS.md. Output — one AGENTS.md written or updated after the user saw the result, plus, for a package/module file, a proposed row for the root Task Router. The handover follows references/report-templates.md.