{"skill_id":"parametric_cad.parameter-architecture","name":"Parameter architecture","domain":"parametric_cad","risk":"low","lane":"tool_evidence","professional_review":false,"round":2,"focus":"failure diagnosis, provenance and safety","principles":["Name parameters by meaning and include units, ranges and dependencies.","Build from stable datums instead of fragile generated edges.","Separate user inputs from derived calculations."],"failure_signals":["Scattered hard-coded dimensions.","Circular dependencies."],"application":"harmless household design example","response_scope":"failure provenance safety only"}