Project Init

Run this workflow only for greenfield initialization.

1. Mode Guard

Before interviewing, check:

1. If both docs/architecture.md and docs/plans.md exist, stop and switch to project-update.
2. If docs are missing but code roots/manifests exist (src/, app/, apps/*/src, package.json, etc.), stop and switch to project-convert.
3. Continue only when docs are missing and codebase signals are absent.

2. Interactive Interview

Collect requirements before generating any docs: