Multi-agent workflow

Scenario: use specialized roles without losing single-writer control.

architect/spec-writer -> planner -> slice-builder -> validator/reviewer -> readiness -> stack-operator

The implementation slice should still have one writer. Reviewers and validators produce findings; accepted fixes go back through the writer and are captured in summaries and blockers.

Use this as a shape check, not a substitute for an approved spec and plan. Start with Quickstart, then use Your first stack for the full walkthrough.