Setup PROJECT.md

Overview

One-shot setup: combine codebase evidence with user-supplied product context into a single root PROJECT.md that answers what this project is and how it fits together. Do not treat this as an ongoing maintenance skill unless the user explicitly asks to regenerate or update the file.

Output

• Write exactly one file: repo-root PROJECT.md.
• If PROJECT.md already exists, ask once whether to overwrite, merge/update, or abort. Do not silently overwrite.

Workflow

1. Map the codebase

Inspect enough to describe the system accurately: