project-intake from smithery.ai

Read the user’s project idea (or spec/idea.md if it exists), plus AGENTS.md and codex.toml if present.
Ask up to 5 targeted questions only if essential info is missing (goal, users, constraints, success metrics).
Create/update:
- spec/brief.md (1–2 pages) with: Goal, Users, Scope/Non-scope, Constraints, Risks, Milestones.
- spec/index.md (navigation hub) with links to brief, architecture, ADRs, and backlog.
End with a proposed “first 3 features” list (thin vertical slices) and recommend running backlog-builder.