open-agent-sdk 0.11.5

Production-ready Rust SDK for building AI agents over two wire protocols: OpenAI chat completions (LMStudio, Ollama, llama.cpp, vLLM, OpenRouter) and Anthropic messages. Features streaming, tools, hooks, retry logic, and comprehensive examples.
Documentation 
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25

/// An asynchronous pre-tool handler shared through [`Arc`].
///
/// Use [`Hooks::add_pre_tool_use`] to wrap a closure automatically. The future is
/// boxed for dynamic dispatch and must be `Send`; the closure is `Send + Sync`.
pub type PreToolUseHandler = Arc<
    dyn Fn(PreToolUseEvent) -> Pin<Box<dyn Future<Output = Option<HookDecision>> + Send>>
        + Send
        + Sync,
>;

/// An asynchronous post-tool handler. See [`PreToolUseHandler`] for its shared
/// closure and future requirements.
pub type PostToolUseHandler = Arc<
    dyn Fn(PostToolUseEvent) -> Pin<Box<dyn Future<Output = Option<HookDecision>> + Send>>
        + Send
        + Sync,
>;

/// An asynchronous prompt handler. See [`PreToolUseHandler`] for its shared
/// closure and future requirements.
pub type UserPromptSubmitHandler = Arc<
    dyn Fn(UserPromptSubmitEvent) -> Pin<Box<dyn Future<Output = Option<HookDecision>> + Send>>
        + Send
        + Sync,
>;