Struct NullIO 

pub struct NullIO;

Silent I/O implementation for unit tests.

• All output methods are no-ops (nothing is printed or logged). • confirm_destructive always returns false — destructive calls are treated as denied. Tests that want to test the “approved” path should use a custom AgentIO mock instead.

Trait Implementations

impl AgentIO for NullIO

fn show_status<'life0, 'life1, 'async_trait>( &'life0 self, _msg: &'life1 str, ) -> Pin<Box<dyn Future<Output = Result<()>> + Send + 'async_trait>>

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

Display a progress / info message. Used for status banners like “auto-continuing…” and “checkpoint”.

fn show_tool_call<'life0, 'life1, 'life2, 'async_trait>( &'life0 self, _tool_name: &'life1 str, _args_preview: &'life2 str, ) -> Pin<Box<dyn Future<Output = Result<()>> + Send + 'async_trait>>

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

Show which tool is about to be called.

fn show_tool_result<'life0, 'life1, 'async_trait>( &'life0 self, _preview: &'life1 str, _is_error: bool, ) -> Pin<Box<dyn Future<Output = Result<()>> + Send + 'async_trait>>

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

Show the first line of a tool’s output after execution.

fn write_error<'life0, 'life1, 'async_trait>( &'life0 self, _msg: &'life1 str, ) -> Pin<Box<dyn Future<Output = Result<()>> + Send + 'async_trait>>

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

Display an error or warning that is NOT part of a tool result. For example, “Reached auto-continue limit” or a hard-stop warning.

fn confirm_destructive<'life0, 'life1, 'life2, 'async_trait>( &'life0 self, _tool_name: &'life1 str, _args_preview: &'life2 str, ) -> Pin<Box<dyn Future<Output = Result<bool>> + Send + 'async_trait>>

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

Ask the user to confirm a destructive tool call.