What problem does it solve? Teams often make build-vs-buy decisions based on gut feel or cost alone, ignoring strategic fit, opportunity cost, risk, and reversibility. This Skill provides a structured framework that scores both options across seven dimensions and produces a defensible, documented decision. ## Core Features & Use Cases - 7-Dimension Decision Matrix: Scores strategic fit, 3-year TCO, time to market, risk, control, learning value, and ecosystem on a 1-10 scale with configurable weights. - 3-Year TCO Calculator: The tco_3y_calc.py script models development, maintenance, infrastructure, subscription, and opportunity costs to compare total ownership cost. - Learning Weights System: The decision_tracker.py script logs decisions to CSV, analyzes override patterns, and suggests weight adjustments based on your actual decision history. - Use Case: A solo founder deciding whether to build authentication or use Supabase runs the matrix, gets a weighted BUY recommendation (8.75 vs 3.85), and logs the decision with reversal triggers for future revisiting. ## Quick Start Ask the assistant to evaluate whether to build or buy a specific capability, such as "evaluate build vs buy for our authentication system using the decision matrix."
