The core principle governing brittle function design is the necessity of encapsulating invariant validation logic—specifically value constraints and contract enforcement—within the function body rather than external pre-checks to ensure early failure states. This theory operates within software engineering, specifically regarding type-safe functional composition where abstract definitions emphasize "fail-fast" mechanisms for optional versus mandatory parameters to prevent masking logical errors via silent defaults like zero division. The concept relates directly to broader computer science disciplines by formalizing how input sanitization and exception handling strategies must be integrated into implementation details to maintain system robustness against invalid states.
The core principle governing brittle function design is the necessity of encapsulating invariant validation logic—specifically value constraints and contract enforcement—within the function body rath…