What problem does it solve? Marketing positioning often drifts from what a product can actually ship, leaving differentiators that cannot be substantiated. This Skill reconciles a positioning canvas against the launch stage record and the claims ledger so every differentiating claim is either verifiable or explicitly flagged as needing a source. ## Core Features & Use Cases - Differentiation Truth Set: Produces a set of defensible differentiators, each labeled Measured, User-provided, or [needs source], with claim ID, stage scope, source reference, and observation window. - Onlyness Statement Re-test: Validates the positioning statement against named alternatives (including status quo) and against the current shippable stage (draft, alpha, beta, GA). - Claims Routing: Routes unverifiable or comparative claims to the claims ledger as proposals without adjudicating them, and flags stage-truth drift between the canvas and the launch registry. - Use Case: Before building a message house, a product marketer checks whether the canvas claim "2x faster than spreadsheets" is substantiated; the Skill marks it [needs source] and routes it to the claims registry. ## Quick Start Trace the positioning truth for our product using the canvas at memory/launch/positioning-mapper/ and the current beta stage, and list which differentiators we can defend today.