flutter-knowledge-patch

# Flutter Knowledge Patch Use this skill before changing Flutter or Dart applications, packages, plug-ins, embedders, build automation, or development tooling. Read the reference that matches the task before choosing an API or migration path; several old flags, generated files, properties, and platform assumptions are no longer valid. ## Reference index | Reference | Topics | | --- | --- | | [accessibility-input-and-testing.md](references/accessibility-input-and-testing.md) | Semantics, accessibility preferences, selection, text input, gestures, and tests | | [android.md](references/android.md) | Android SDK and Gradle requirements, rendering, platform views, system UI, and embedding | | [apple-platforms.md](references/apple-platforms.md) | UIScene, Swift Package Manager, Xcode, Cupertino integration, signing, and Apple rendering | | [dart-language.md](references/dart-language.md) | Dot shorthands, null-aware collection elements, flow analysis, constructors, and roadmap | | [dart-tooling-and-packages.md](references/dart-tooling-and-packages.md) | Formatter, analyzer plug-ins, Pub, workspaces, build hooks, native assets, and publishing | | [desktop-and-embedding.md](references/desktop-and-embedding.md) | Thread merging, add-to-app sizing, multi-window APIs, displays, input, and architectures | | [migrations-and-breaking-changes.md](references/migrations-and-breaking-changes.md) | Cross-cutting removals, deprecations, callback changes, and required source migrations | | [nav...