gstack-sprint

<Use_When>

• End-to-end feature implementation ("build this feature", "design it and implement it")
• Build or Mid-sized intent type with implementation phase included
• User says "sprint", "end-to-end", "e2e implementation" </Use_When>

<Do_Not_Use_When>

• Pure design/planning/idea review without implementation → use /office-hours or /plan-ceo-review directly
• Architecture intent type (design only, no build)
• "just design it", "just plan it", "review my idea" — these route to /office-hours or /plan-ceo-review
• Single-purpose requests: code review → /review, QA → /qa, deploy → /ship
• Trivial fixes, research, documentation </Do_Not_Use_When>