refactor(core): remove provider module, migrate to LLMProvider, add client mode handling, improve serialization error handling, update workspace edition, and clean up conditionals and imports

README.md

@@ -30,6 +30,7 @@ The OWLEN interface features a clean, multi-panel layout with vim-inspired navig
 - **Streaming Responses**: Real-time token streaming from Ollama.
 - **Advanced Text Editing**: Multi-line input, history, and clipboard support.
 - **Session Management**: Save, load, and manage conversations.
+- **Code Side Panel**: Switch to code mode (`:mode code`) and open files inline with `:open <path>` for LLM-assisted coding.
 - **Theming System**: 10 built-in themes and support for custom themes.
 - **Modular Architecture**: Extensible provider system (Ollama today, additional providers on the roadmap).
 - **Guided Setup**: `owlen config doctor` upgrades legacy configs and verifies your environment in seconds.
@@ -118,6 +119,16 @@ You can also add custom themes alongside the config directory (e.g., `~/.config/
 
 See the [themes/README.md](themes/README.md) for more details on theming.
 
+## Testing
+
+Owlen uses standard Rust tooling for verification. Run the full test suite with:
+
+```bash
+cargo test
+```
+
+Unit tests cover the command palette state machine, agent response parsing, and key MCP abstractions. Formatting and lint checks can be run with `cargo fmt --all` and `cargo clippy` respectively.
+
 ## Roadmap
 
 Upcoming milestones focus on feature parity with modern code assistants while keeping Owlen local-first: