Validated on the combined batch board over tip 92ef3c71: static gates clean (changelog, file-size, complexity 2624<=2774, cognitive 1182<=1223, dead-code 411<=416), typecheck:core clean, focused tests green.
Combo without models is now refused at the schema boundary (API 400), the CLI flags it, and openapi.yaml matches the real contract (phantom props removed). combo-* suites + cli-combo-create-models green on the board. Closes#10954. Thank you @maxmad64bis!
