rho-coding-agent 1.48.0

A lightweight agent harness inspired by Pi
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//! Conversation provider/model switches on a live interactive runtime.
//!
//! Session-level replace, reasoning, compaction, notice, and delegated
//! selection live in [`crate::app::conversation_switch`]. This wrapper adds
//! TUI display history, MCP sampling, and run-transition. Post-replace
//! failures roll the provider back so `Err` means the active provider is
//! unchanged whenever restore itself succeeds.

use std::sync::Arc;

use rho_sdk::{provider::ModelProvider, Error};

use crate::app::conversation_switch;

use super::{
    active_run_disposition, startup, ActiveRunCommand, ActiveRunDisposition, InteractiveRuntime,
};

impl InteractiveRuntime {
    pub(crate) fn replace_provider(
        &mut self,
        provider: Arc<dyn ModelProvider>,
        reasoning: rho_sdk::ReasoningLevel,
        auth: &str,
    ) -> Result<rho_sdk::model::handoff::HandoffReport, Error> {
        if self.is_session_busy() {
            if self.runs.is_active() {
                debug_assert_eq!(
                    active_run_disposition(ActiveRunCommand::ReplaceProvider),
                    ActiveRunDisposition::DeferUntilFinished
                );
            }
            return Err(Error::SessionBusy);
        }
        self.runs.begin_provider_switch()?;
        let previous_provider = Arc::clone(self.provider.provider());
        let context_window = self.context_window;
        let mut record_notice = |context: String, display: String| {
            InteractiveRuntime::record_user_context_with_display(&self.sessions, context, display)
                .map_err(|error| Error::InvalidConfiguration {
                    message: error.to_string(),
                })
        };
        let result = conversation_switch::apply_conversation_switch(
            conversation_switch::ConversationSwitch {
                session: self.sessions.session(),
                tools: &self.tools,
                previous_provider,
                new_provider: Arc::clone(&provider),
                new_reasoning: reasoning,
                auth,
                compaction: self.compaction.clone(),
                context_window,
                previous_context_window: context_window,
                usage_recording: self.usage_recording.clone(),
            },
            conversation_switch::SwitchNotice::WithDisplay(&mut record_notice),
        );
        match result {
            Ok(report) => {
                self.provider.adopt(provider, reasoning);
                self.refresh_context_usage();
                startup::bind_mcp_sampling(
                    &self.mcp_sampling,
                    self.provider.provider(),
                    self.sessions.session().id(),
                    self.workspace.root(),
                );
                self.invalidate_live_context();
                self.runs.finish_transition();
                Ok(report)
            }
            Err(error) => {
                self.runs.finish_transition();
                Err(error)
            }
        }
    }
}