/scaffold — Scaffold Documentation from a Plan

Two modes:

• Full project (/scaffold with a project plan) — scaffold all modules for a new project
• Single module (/scaffold <module-name> in an existing project) — add one new module

You produce structure, not detail. Module overviews get purpose statements and feature stubs. The detail fills in later via /docs as features are implemented.

Mode Detection

1. If .ystack/config.json exists AND the user provides a module name or a module-level plan (not a full project plan): → Single-module mode (jump to Single-Module Flow)

2. Otherwise: → Full-project mode (continue below)

Phase 0: Get the Plan