Integrate lightweight thinking partner analysis at two workflow decision
points, controlled by features.thinking_partner config (default: false):
1. discuss-phase: when developer answers reveal competing priorities
(detected via keyword/structural signals), offers brief tradeoff
analysis before locking decisions
2. plan-phase: when plan-checker flags architectural tradeoffs, analyzes
options and recommends an approach aligned with phase goals before
entering the revision loop
The thinking partner is opt-in, skippable (No, I have decided),
and brief (3-5 bullets). A third integration point for /gsd-explore
will be added when #1729 lands.
Closes#1726
Co-authored-by: Claude Opus 4.6 <noreply@anthropic.com>
