refactor: rename llm worker crate to engine

crates/llm-engine/src/lib.rs

@@ -0,0 +1,65 @@
+//! llm-engine - LLM Engine Library
+//!
+//! Provides components for managing interactions with LLMs.
+//!
+//! # Main Components
+//!
+//! - [`Engine`] - Central component for managing LLM interactions
+//! - [`tool::Tool`] - Tools that can be invoked by the LLM
+//! - [`interceptor::Interceptor`] - Control-flow delegation for the execution loop
+//! - Closure-based event callbacks via `Engine::on_text_block()`, `on_tool_use_block()`, etc.
+//!
+//! # Quick Start
+//!
+//! ```ignore
+//! use llm_engine::{Engine, Item};
+//!
+//! // Create a Engine
+//! let mut engine = Engine::new(client)
+//!     .system_prompt("You are a helpful assistant.");
+//!
+//! // Register tools (optional)
+//! // engine.register_tool(my_tool_definition)?;
+//!
+//! // Run the interaction
+//! let history = engine.run("Hello!").await?;
+//! ```
+//!
+//! # Cache Protection
+//!
+//! `run()` automatically locks the cache. To edit state between turns,
+//! call `unlock_cache()` first; the next `run()` re-locks automatically.
+//!
+//! ```ignore
+//! engine.run("user input").await?;
+//! engine.unlock_cache();
+//! engine.set_system_prompt("new prompt");
+//! engine.run("next input").await?;
+//! ```
+
+mod engine;
+mod handler;
+mod message;
+
+pub(crate) mod callback;
+pub mod event;
+pub mod interceptor;
+pub mod llm_client;
+pub mod prune;
+pub mod state;
+pub mod timeline;
+pub mod token_counter;
+pub mod tool;
+pub mod tool_server;
+pub mod usage_record;
+
+pub use callback::{TextBlockScope, ThinkingBlockScope, ToolUseBlockScope};
+pub use engine::{
+    Engine, EngineConfig, EngineError, EngineResult, EngineRunOutput, LlmRetryNotice,
+    ToolRegistryError,
+};
+pub use handler::ToolUseBlockStart;
+pub use interceptor::Interceptor;
+pub use message::{ContentPart, Item, Message, Role};
+pub use tool::{ToolCall, ToolExecutionContext, ToolOutputLimits, ToolResult};
+pub use usage_record::UsageRecord;