Trait HookCallback 

pub trait HookCallback: Send + Sync {
    // Required method
    fn execute<'life0, 'life1, 'life2, 'life3, 'async_trait>(
        &'life0 self,
        input: &'life1 HookInput,
        tool_use_id: Option<&'life2 str>,
        context: &'life3 HookContext,
    ) -> Pin<Box<dyn Future<Output = Result<HookJSONOutput, SdkError>> + Send + 'async_trait>>
       where Self: 'async_trait,
             'life0: 'async_trait,
             'life1: 'async_trait,
             'life2: 'async_trait,
             'life3: 'async_trait;
}

Hook callback trait with strongly-typed inputs and outputs

This trait is used to implement custom hook callbacks that can intercept and modify Claude’s behavior at various points in the conversation.

Required Methods

fn execute<'life0, 'life1, 'life2, 'life3, 'async_trait>( &'life0 self, input: &'life1 HookInput, tool_use_id: Option<&'life2 str>, context: &'life3 HookContext, ) -> Pin<Box<dyn Future<Output = Result<HookJSONOutput, SdkError>> + Send + 'async_trait>>

where Self: 'async_trait, 'life0: 'async_trait, 'life1: 'async_trait, 'life2: 'async_trait, 'life3: 'async_trait,

Execute the hook with strongly-typed input and output

Arguments

• input - Strongly-typed hook input (discriminated union)
• tool_use_id - Optional tool use identifier
• context - Hook context with abort signal support

Returns

A HookJSONOutput that controls Claude’s behavior

Implementors