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Repository contribution workflow. Use for any code change that should become a commit — adding features, fixing bugs, refactoring, or any source modification. Drives the full Issue → Branch → PR → Merge process.

Layout and styling in GPUI. Use when styling components, layout systems, or CSS-like properties.

Performance optimization techniques for GPUI including rendering optimization, layout performance, memory management, and profiling strategies. Use when user needs to optimize GPUI application performance or debug performance issues.

GPUI Component project style guide based on gpui-component code patterns. Use when writing new components, reviewing code, or ensuring consistency with existing gpui-component implementations. Covers component structure, trait implementations, naming conventions, and API patterns observed in the actual codebase.

GPUI styling system including theme design, responsive layouts, visual design patterns, and style composition. Use when user needs help with styling, theming, or visual design in GPUI.

Common GPUI patterns including component composition, state management strategies, event handling, and action dispatching. Use when user needs guidance on GPUI patterns, component design, or state management approaches.

Writing tests for GPUI applications. Use when testing components, async operations, or UI behavior.

Action definitions and keyboard shortcuts in GPUI. Use when implementing actions, keyboard shortcuts, or key bindings.

Event handling and subscriptions in GPUI. Use when implementing events, observers, or event-driven patterns. Supports custom events, entity observations, and event subscriptions for coordinating between components.

Context management in GPUI including App, Window, and AsyncApp. Use when working with contexts, entity updates, or window operations. Different context types provide different capabilities for UI rendering, entity management, and async operations.

Focus management and keyboard navigation in GPUI. Use when handling focus, focus handles, or keyboard navigation. Enables keyboard-driven interfaces with proper focus tracking and navigation between focusable elements.

Async operations and background tasks in GPUI. Use when working with async, spawn, background tasks, or concurrent operations. Essential for handling async I/O, long-running computations, and coordinating between foreground UI updates and background work.

Global state management in GPUI. Use when implementing global state, app-wide configuration, or shared resources.