agent2: Emit cancellation stop reason on cancel (#36381)
Release Notes: - N/A --------- Co-authored-by: Antonio Scandurra <me@as-cii.com>
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Ben Brandt
GitHub
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b3969ed427
commit
ea828c0c59
2 changed files with 191 additions and 93 deletions
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@ -461,7 +461,7 @@ pub struct Thread {
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/// Holds the task that handles agent interaction until the end of the turn.
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/// Survives across multiple requests as the model performs tool calls and
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/// we run tools, report their results.
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running_turn: Option<Task<()>>,
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running_turn: Option<RunningTurn>,
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pending_message: Option<AgentMessage>,
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tools: BTreeMap<SharedString, Arc<dyn AnyAgentTool>>,
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tool_use_limit_reached: bool,
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@ -554,8 +554,9 @@ impl Thread {
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}
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pub fn cancel(&mut self) {
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// TODO: do we need to emit a stop::cancel for ACP?
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self.running_turn.take();
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if let Some(running_turn) = self.running_turn.take() {
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running_turn.cancel();
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}
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self.flush_pending_message();
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}
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@ -616,108 +617,118 @@ impl Thread {
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&mut self,
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cx: &mut Context<Self>,
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) -> mpsc::UnboundedReceiver<Result<AgentResponseEvent>> {
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self.cancel();
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let model = self.model.clone();
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let (events_tx, events_rx) = mpsc::unbounded::<Result<AgentResponseEvent>>();
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let event_stream = AgentResponseEventStream(events_tx);
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let message_ix = self.messages.len().saturating_sub(1);
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self.tool_use_limit_reached = false;
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self.running_turn = Some(cx.spawn(async move |this, cx| {
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log::info!("Starting agent turn execution");
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let turn_result: Result<()> = async {
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let mut completion_intent = CompletionIntent::UserPrompt;
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loop {
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log::debug!(
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"Building completion request with intent: {:?}",
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completion_intent
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);
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let request = this.update(cx, |this, cx| {
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this.build_completion_request(completion_intent, cx)
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})?;
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self.running_turn = Some(RunningTurn {
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event_stream: event_stream.clone(),
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_task: cx.spawn(async move |this, cx| {
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log::info!("Starting agent turn execution");
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let turn_result: Result<()> = async {
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let mut completion_intent = CompletionIntent::UserPrompt;
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loop {
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log::debug!(
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"Building completion request with intent: {:?}",
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completion_intent
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);
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let request = this.update(cx, |this, cx| {
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this.build_completion_request(completion_intent, cx)
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})?;
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log::info!("Calling model.stream_completion");
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let mut events = model.stream_completion(request, cx).await?;
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log::debug!("Stream completion started successfully");
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log::info!("Calling model.stream_completion");
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let mut events = model.stream_completion(request, cx).await?;
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log::debug!("Stream completion started successfully");
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let mut tool_use_limit_reached = false;
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let mut tool_uses = FuturesUnordered::new();
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while let Some(event) = events.next().await {
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match event? {
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LanguageModelCompletionEvent::StatusUpdate(
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CompletionRequestStatus::ToolUseLimitReached,
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) => {
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tool_use_limit_reached = true;
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}
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LanguageModelCompletionEvent::Stop(reason) => {
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event_stream.send_stop(reason);
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if reason == StopReason::Refusal {
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this.update(cx, |this, _cx| {
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this.flush_pending_message();
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this.messages.truncate(message_ix);
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})?;
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return Ok(());
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let mut tool_use_limit_reached = false;
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let mut tool_uses = FuturesUnordered::new();
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while let Some(event) = events.next().await {
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match event? {
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LanguageModelCompletionEvent::StatusUpdate(
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CompletionRequestStatus::ToolUseLimitReached,
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) => {
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tool_use_limit_reached = true;
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}
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LanguageModelCompletionEvent::Stop(reason) => {
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event_stream.send_stop(reason);
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if reason == StopReason::Refusal {
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this.update(cx, |this, _cx| {
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this.flush_pending_message();
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this.messages.truncate(message_ix);
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})?;
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return Ok(());
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}
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}
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event => {
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log::trace!("Received completion event: {:?}", event);
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this.update(cx, |this, cx| {
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tool_uses.extend(this.handle_streamed_completion_event(
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event,
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&event_stream,
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cx,
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));
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})
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.ok();
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}
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}
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event => {
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log::trace!("Received completion event: {:?}", event);
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this.update(cx, |this, cx| {
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tool_uses.extend(this.handle_streamed_completion_event(
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event,
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&event_stream,
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cx,
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));
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})
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.ok();
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}
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}
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let used_tools = tool_uses.is_empty();
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while let Some(tool_result) = tool_uses.next().await {
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log::info!("Tool finished {:?}", tool_result);
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event_stream.update_tool_call_fields(
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&tool_result.tool_use_id,
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acp::ToolCallUpdateFields {
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status: Some(if tool_result.is_error {
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acp::ToolCallStatus::Failed
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} else {
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acp::ToolCallStatus::Completed
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}),
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raw_output: tool_result.output.clone(),
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..Default::default()
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},
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);
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this.update(cx, |this, _cx| {
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this.pending_message()
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.tool_results
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.insert(tool_result.tool_use_id.clone(), tool_result);
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})
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.ok();
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}
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if tool_use_limit_reached {
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log::info!("Tool use limit reached, completing turn");
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this.update(cx, |this, _cx| this.tool_use_limit_reached = true)?;
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return Err(language_model::ToolUseLimitReachedError.into());
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} else if used_tools {
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log::info!("No tool uses found, completing turn");
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return Ok(());
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} else {
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this.update(cx, |this, _| this.flush_pending_message())?;
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completion_intent = CompletionIntent::ToolResults;
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}
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}
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let used_tools = tool_uses.is_empty();
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while let Some(tool_result) = tool_uses.next().await {
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log::info!("Tool finished {:?}", tool_result);
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event_stream.update_tool_call_fields(
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&tool_result.tool_use_id,
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acp::ToolCallUpdateFields {
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status: Some(if tool_result.is_error {
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acp::ToolCallStatus::Failed
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} else {
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acp::ToolCallStatus::Completed
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}),
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raw_output: tool_result.output.clone(),
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..Default::default()
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},
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);
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this.update(cx, |this, _cx| {
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this.pending_message()
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.tool_results
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.insert(tool_result.tool_use_id.clone(), tool_result);
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})
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.ok();
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}
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if tool_use_limit_reached {
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log::info!("Tool use limit reached, completing turn");
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this.update(cx, |this, _cx| this.tool_use_limit_reached = true)?;
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return Err(language_model::ToolUseLimitReachedError.into());
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} else if used_tools {
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log::info!("No tool uses found, completing turn");
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return Ok(());
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} else {
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this.update(cx, |this, _| this.flush_pending_message())?;
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completion_intent = CompletionIntent::ToolResults;
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}
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}
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}
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.await;
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.await;
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this.update(cx, |this, _| this.flush_pending_message()).ok();
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if let Err(error) = turn_result {
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log::error!("Turn execution failed: {:?}", error);
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event_stream.send_error(error);
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} else {
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log::info!("Turn execution completed successfully");
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}
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}));
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if let Err(error) = turn_result {
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log::error!("Turn execution failed: {:?}", error);
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event_stream.send_error(error);
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} else {
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log::info!("Turn execution completed successfully");
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}
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this.update(cx, |this, _| {
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this.flush_pending_message();
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this.running_turn.take();
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})
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.ok();
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}),
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});
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events_rx
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}
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@ -1125,6 +1136,23 @@ impl Thread {
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}
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}
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struct RunningTurn {
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/// Holds the task that handles agent interaction until the end of the turn.
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/// Survives across multiple requests as the model performs tool calls and
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/// we run tools, report their results.
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_task: Task<()>,
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/// The current event stream for the running turn. Used to report a final
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/// cancellation event if we cancel the turn.
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event_stream: AgentResponseEventStream,
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}
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impl RunningTurn {
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fn cancel(self) {
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log::debug!("Cancelling in progress turn");
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self.event_stream.send_canceled();
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}
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}
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pub trait AgentTool
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where
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Self: 'static + Sized,
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@ -1336,6 +1364,12 @@ impl AgentResponseEventStream {
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}
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}
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fn send_canceled(&self) {
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self.0
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.unbounded_send(Ok(AgentResponseEvent::Stop(acp::StopReason::Canceled)))
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.ok();
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}
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fn send_error(&self, error: impl Into<anyhow::Error>) {
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self.0.unbounded_send(Err(error.into())).ok();
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}
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