chore: update .gitignore and enhance README with compositor setup instructions

.gitignore

@@ -1 +1,2 @@
 target/
+.worktrees/

CLAUDE.md

@@ -0,0 +1,58 @@
+## 1. Core Philosophy
+
+- **Test-Driven Development (TDD):** No functional code is written without a failing test first. Red-Green-Refactor is the mandatory cycle.
+- **Clean Architecture:** Maintain strict separation between Domain, Application, and Infrastructure layers.
+- **Newtype Pattern:** Use the "Newtype" pattern for all domain primitives (e.g., `struct UserId(Uuid)`) to ensure type safety and prevent primitive obsession.
+
+---
+
+## 2. Structural Rules
+
+### Dependency Management
+
+- **Strict Unidirectionality:** Dependencies must only point inwards (towards the Domain).
+- **No Cyclic Dependencies:** Use traits and Dependency Injection (DI) to break cycles. If two modules need each other, abstract the shared behavior into a trait or move common data to a lower-level module.
+- **Feature Gating:** Organize the project into logical crates or modules that can be compiled independently.
+
+### Traits and Decoupling
+
+- **Swappable Infrastructure:** Define all external interactions (Database, API, File System) as traits in the Application layer.
+- **Small Traits:** Adhere to the Interface Segregation Principle. Favor many specific traits over one "God" trait.
+- **Mocking:** Use traits to allow easy mocking in unit tests without requiring a real database or network.
+
+---
+
+## 3. Rust Specifics & Clean Code
+
+### Type Safety
+
+- Avoid `String` or `i32` for domain concepts. Wrap them in structs.
+- Use `Result` and `Option` explicitly. Minimize `unwrap()` and `expect()`—handle errors gracefully at the boundaries.
+
+### Formatting & Style
+
+- Follow standard `rustfmt` and `clippy` suggestions.
+- Function names should be descriptive (e.g., `process_valid_order` instead of `handle_data`).
+- Keep functions small (typically under 20-30 lines).
+
+---
+
+## 4. Layer Definitions
+
+| Layer              | Responsibility                                | Allowed Dependencies |
+| ------------------ | --------------------------------------------- | -------------------- |
+| **Domain**         | Pure Business Logic, Entities, Value Objects. | None (Pure Rust)     |
+| **Application**    | Use Cases, Orchestration, Trait definitions.  | Domain               |
+| **Infrastructure** | Trait implementations (DB, HTTP clients).     | Domain, Application  |
+| **Main/API**       | Entry point, Wire-up/DI, Routing.             | All of the above     |
+
+---
+
+## 5. TDD Workflow Requirement
+
+1. **Write a Test:** Create a test in `src/lib.rs` or a `tests/` directory.
+2. **Define the Interface:** Use a trait or function signature to make the test compile (but fail).
+3. **Minimum Implementation:** Write just enough code to pass the test.
+4. **Refactor:** Clean up the logic, ensure no duplication, and check for "Newtype" opportunities.
+
+> **Note on Cyclic Dependencies:** If an AI agent suggests a change that introduces a cycle, it must be rejected. Use **Inversion of Control** by defining a trait in the higher-level module that the lower-level module implements.

README.md

@@ -2,8 +2,6 @@
 
 A lightweight, GPU-accelerated command palette for Linux (Wayland/X11). Zero Electron — every pixel rendered via WGPU. Async search that never blocks the UI.
 
-![k-launcher](docs/screenshot.png)
-
 ## Quick Start
 
 ```bash
@@ -27,6 +25,7 @@ cargo build --release
 k-launcher uses a normal window; configure your compositor to float it.
 
 **Hyprland** (`~/.config/hypr/hyprland.conf`):
+
 ```
 windowrule = float, ^(k-launcher)$
 windowrule = center, ^(k-launcher)$
@@ -34,6 +33,7 @@ bind = SUPER, Space, exec, k-launcher
 ```
 
 **Sway** (`~/.config/sway/config`):
+
 ```
 for_window [app_id="k-launcher"] floating enable, move position center
 bindsym Mod4+space exec k-launcher