feat: Introduce event timeline and handler system

worker-macros/Cargo.toml

@@ -0,0 +1,13 @@
+[package]
+name = "worker-macros"
+version = "0.1.0"
+edition = "2024"
+
+[lib]
+proc-macro = true
+
+[dependencies]
+proc-macro2 = "1"
+quote = "1"
+syn = { version = "2", features = ["full"] }
+worker-types = { path = "../worker-types" }

worker-macros/src/lib.rs

@@ -0,0 +1,41 @@
+//! worker-macros - LLMワーカー用のProcedural Macros
+//!
+//! このクレートはTools/Hooksを定義するためのマクロを提供する予定です。
+//!
+//! TODO: Tool定義マクロの実装
+//! TODO: Hook定義マクロの実装
+
+use proc_macro::TokenStream;
+
+/// ツール定義マクロ（未実装）
+///
+/// # Example
+/// ```ignore
+/// #[tool(
+///     name = "get_weather",
+///     description = "Get weather information for a city"
+/// )]
+/// fn get_weather(city: String) -> Result<WeatherInfo, ToolError> {
+///     // ...
+/// }
+/// ```
+#[proc_macro_attribute]
+pub fn tool(_attr: TokenStream, item: TokenStream) -> TokenStream {
+    // TODO: 実装
+    item
+}
+
+/// フック定義マクロ（未実装）
+///
+/// # Example
+/// ```ignore
+/// #[hook(on = "before_tool_call")]
+/// fn log_tool_call(tool_name: &str) {
+///     println!("Calling tool: {}", tool_name);
+/// }
+/// ```
+#[proc_macro_attribute]
+pub fn hook(_attr: TokenStream, item: TokenStream) -> TokenStream {
+    // TODO: 実装
+    item
+}