feat: add vision-researcher domain expansion agent to mgw:project

[snipcodeit]

Summary

For fresh projects (STATE_CLASS=Fresh), before structured questioning, spawn a silent vision-researcher Task agent that expands the raw idea into domain analysis, platform requirements, competitive landscape, and risk factors. Output stored to .mgw/vision-research.json.

What vision-researcher produces

• domain_analysis: what the domain actually requires
• platform_requirements: specific technical/integration needs
• competitive_landscape: what similar solutions exist
• risk_factors: common failure modes for this type of project
• suggested_questions: targeted questions to ask the user based on research

Files

• commands/project.md — add vision_research step after intake in Fresh path; replace shallow "What are you building?" with structured intake + research spawn

GSD Route

gsd:quick

Depends On

• A1 (must be in Fresh state path)
• B1 (Vision Brief format must be defined)

[snipcodeit]

MGW execution-complete · 2026-03-01T00:00:00Z
Milestone: v3 — Vision Collaboration Cycle | Phase 21: Vision Brief Foundation

Implementation Complete

Implemented in commit 4ec1b39 on branch feat/mgw-gsd-architecture-repair.

Added vision_intake and vision_research steps to commands/project.md:

• vision_intake: captures raw idea to .mgw/vision-draft.md with project name, description, personas, non-goals
• vision_research: spawns vision-researcher agent that expands the idea into domain context, writes .mgw/vision-research.json

Part of PR #102.