<ul><li>State is unavoidable in real-world systems like backend applications, but managing it deliberately is key.</li><li>Lessons from building TypeWire show the importance of structuring, isolating, and owning state confidently.</li><li>TypeWire's evolution illustrated clear layers of state management: TypeWireContainer, ScopedResolutionContext, and ResolutionState.</li><li>Managing short-lived state is crucial to prevent ambiguity and ensure clear ownership boundaries.</li><li>Internal state should be well-abstracted to allow gradual refinement and evolution towards clarity.</li><li>Delegating state ownership to the appropriate layer minimizes mutability and centralizes behavior.</li><li>Long-lived versus contextual state should be handled distinctly to prevent scope bleed and maintain clear ownership.</li><li>Careful structuring and encapsulation help prevent context-sensitive state leakage into shared objects.</li><li>Ownership clarity is crucial for effective state management to avoid unowned state causing issues in the system.</li><li>By embracing internal state with clear boundaries and ownership, systems can effectively utilize state without sprawl or ambiguity.</li></ul>

Internal State: Not Evil, Just Misplaced

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