Flow Architect

@khgs2411/flow-framework-flow-architect

Guide architectural decisions and PLAN.md updates using Flow framework. Use when user discusses "architecture", "how should we architect", "design patterns", "how should we structure", "how do we structure", "technology choice", "should we use", "DO/DON'T rules", "update architecture", or wants to update Architecture section in PLAN.md. Helps document architectural decisions, update DO/DON'T guidelines, define scope boundaries, and record technology choices during brainstorming.