The Next Up block always suggested /gsd-plan-phase, but plan-phase redirects to discuss-phase when CONTEXT.md doesn't exist. This caused a confusing two-step redirect ~90% of the time since ui-phase doesn't create CONTEXT.md. Conditionally suggest discuss-phase or plan-phase based on CONTEXT.md existence, matching the logic in progress.md Route B. Co-authored-by: Claude Opus 4.6 (1M context) <noreply@anthropic.com>