use crate::function_tool::FunctionCallError;use crate::tools::context::FunctionToolOutput;use crate::tools::context::ToolInvocation;use crate::tools::context::ToolPayload;use crate::tools::context::boxed_tool_output;use crate::tools::handlers::new_context_window_spec::NEW_CONTEXT_WINDOW_TOOL_NAME;use crate::tools::handlers::new_context_window_spec::create_new_context_window_tool;use crate::tools::registry::CoreToolRuntime;use crate::tools::registry::ToolExecutor;use codex_tools::ToolName;use codex_tools::ToolSpec;pub(crate) const NEW_CONTEXT_WINDOW_MESSAGE: &str =    "A new context window will start without summarizing conversation history.";pub struct NewContextWindowHandler;impl ToolExecutor<ToolInvocation> for NewContextWindowHandler {    fn tool_name(&self) -> ToolName {        ToolName::plain(NEW_CONTEXT_WINDOW_TOOL_NAME)    }    fn spec(&self) -> ToolSpec {        create_new_context_window_tool()    }    fn handle(&self, invocation: ToolInvocation) -> codex_tools::ToolExecutorFuture<'_> {        Box::pin(async move {            if !matches!(invocation.payload, ToolPayload::Function { .. }) {                return Err(FunctionCallError::RespondToModel(                    "new_context handler received unsupported payload".to_string(),                ));            }            invocation.session.request_new_context_window().await;            Ok(boxed_tool_output(FunctionToolOutput::from_text(                NEW_CONTEXT_WINDOW_MESSAGE.to_string(),                Some(true),            )))        })    }}impl CoreToolRuntime for NewContextWindowHandler {}