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Advanced Error Handling in Dart: Type-Safe Failures for Production

This article dives into advanced error handling in Dart, moving beyond basic `try-catch` blocks to build robust, type-safe failure mechanisms. It covers Dart Records for lightweight results, sealed `AppResult` classes with monadic `map` and `flatMap` for enforced handling, integration with `dartz`'s `Either` for functional purity, and Freezed for creating exhaustive, typed exceptions. The goal is to make failures visible, compiler-enforced, and impossible to ignore in production applications.