Implements a Boundary widget that caches the layout and paint output of its child subtree. It performs identity verification and dynamic dependency tracking to avoid unnecessary rebuilds. This is a core optimization for the custom UI framework, enabling efficient repaint of only changed regions. The pattern is self-contained and could be extracted for any retained-mode UI system.

Provides a modifier press tracker that detects single, double, and chord presses of modifier keys (e.g., Ctrl, Alt, Shift). It uses timestamps and cancellation logic to distinguish between hold, double-tap, and chord combinations. This is a reusable input processing pattern applicable to any application needing advanced hotkey recognition beyond simple key down/up.

Implements a custom tokenizer for SQLite FTS5 that handles CJK characters (unigrams and bigrams) and Latin text (camelCase splitting, punctuation handling). It is used for file content search indexing. The tokenizer is self-contained, well-tested, and could be reused in any project needing multilingual full-text search with SQLite.

Defines a generic SettingValue[T] type with lazy loading from a store, validation via pluggable validators, syncable flag for cloud sync, and platform-specific key support. This pattern abstracts away the complexity of reading/writing settings with type safety and is reusable for any application with a settings system.