What problem does it solve? Product teams routinely build solutions on untested assumptions, wasting effort on ideas that fail late. This Skill structures assumption testing so you identify the riskiest beliefs first and validate them with the lightest possible method before committing resources. ## Core Features & Use Cases - Assumption Mapping and Prioritization: Lists all assumptions across desirability, usability, feasibility, viability, and ethical dimensions, then ranks them on an importance-vs-evidence 2x2 matrix. - AFTER Test Selection: Chooses the lightest meaningful test from 28 techniques organized by Gilad's AFTER model (Assessment, Fact-Finding, Tests, Experiments, Release Results), from cheap internal assessments to A/B tests and staged rollouts. - Hypothesis and Prediction Discipline: Writes Lean UX hypothesis statements with measurable success criteria and forces a stated prediction before running the test, so the gap between expectation and reality becomes the learning. - Use Case: A PM believes users will switch from a competitor tool. The Skill maps that desirability assumption, flags it as high-importance/low-evidence, and recommends a concierge test with defined success criteria before any engineering begins. ## Quick Start Use the suposicoes skill to map the assumptions behind my proposed feature and design the cheapest test for the riskiest one.
