Define the product (ambient AI teammate that prevents merge collisions
before push), architecture, stack per folder, build order, and demo script.
Co-Authored-By: Claude Opus 4.8 <noreply@anthropic.com>
Set up top-level structure (backend, frontend, database, infra, shared,
docs) with .gitkeep placeholders, root README, and .gitignore.
Co-Authored-By: Claude Opus 4.8 <noreply@anthropic.com>