What problem does it solve? Product strategies often fail at the seams: positioning, problem statements, PRDs, backlogs, and roadmaps can each look defensible while contradicting one another. This Skill runs a closing strategy session that stress-tests the existing artifact set, surfaces contradictions, runs a premortem, tests the biggest bet, and records every open thread in an owned, dated decision log. ## Core Features & Use Cases - Coherence check across seven seams: Walks joins like positioning vs problem statement and backlog P0s vs PRD scope, recording each seam as holding or contradictory. - Structured premortem and biggest-bet test: Facilitates silent-writing premortems across five cause categories and tests what would have to be true for the biggest bet, labeling conditions as Fact, Inference, or Assumption. - Decision log with owners and dates: Emits a stable-column decision log in STRATEGY_SESSION.md so no open thread leaks without a named owner and a date. - Use Case: After running a product onboarding pipeline that produced a PRD, roadmap, and epic breakdown, use this Skill as Phase 5 to verify the roadmap still serves the problem statement and to log unresolved contradictions before committing to delivery. ## Quick Start Run a closing product strategy session over the positioning, PRD, roadmap, and backlog artifacts in my working folder and produce a decision log of open questions with owners and dates.