Note: This skill is independent analysis and commentary, not a reproduction of any original text. It synthesizes frameworks from multiple books with modern startup practice and routes founders to the right tool for their situation. Diagnose "The dangerous moment is when you apply the right framework to the wrong problem." When to Use This Skill This skill exists because frameworks are tools, not answers. A hammer doesn't help when the problem is a screw. The first job is diagnosis — figuring out what's actually broken before reaching for any specific framework. --- The Five Failure Modes Ever…