303 lines
11 KiB
Rust
303 lines
11 KiB
Rust
//! Asynchronous worker that executes a **Codex** tool-call inside a spawned
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//! Tokio task. Separated from `message_processor.rs` to keep that file small
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//! and to make future feature-growth easier to manage.
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use std::collections::HashMap;
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use std::sync::Arc;
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use codex_core::CodexConversation;
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use codex_core::ConversationManager;
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use codex_core::NewConversation;
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use codex_core::config::Config as CodexConfig;
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use codex_core::protocol::AgentMessageEvent;
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use codex_core::protocol::ApplyPatchApprovalRequestEvent;
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use codex_core::protocol::Event;
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use codex_core::protocol::EventMsg;
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use codex_core::protocol::ExecApprovalRequestEvent;
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use codex_core::protocol::InputItem;
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use codex_core::protocol::Op;
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use codex_core::protocol::Submission;
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use codex_core::protocol::TaskCompleteEvent;
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use mcp_types::CallToolResult;
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use mcp_types::ContentBlock;
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use mcp_types::RequestId;
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use mcp_types::TextContent;
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use serde_json::json;
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use tokio::sync::Mutex;
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use uuid::Uuid;
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use crate::exec_approval::handle_exec_approval_request;
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use crate::outgoing_message::OutgoingMessageSender;
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use crate::outgoing_message::OutgoingNotificationMeta;
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use crate::patch_approval::handle_patch_approval_request;
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pub(crate) const INVALID_PARAMS_ERROR_CODE: i64 = -32602;
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/// Run a complete Codex session and stream events back to the client.
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///
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/// On completion (success or error) the function sends the appropriate
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/// `tools/call` response so the LLM can continue the conversation.
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pub async fn run_codex_tool_session(
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id: RequestId,
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initial_prompt: String,
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config: CodexConfig,
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outgoing: Arc<OutgoingMessageSender>,
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conversation_manager: Arc<ConversationManager>,
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running_requests_id_to_codex_uuid: Arc<Mutex<HashMap<RequestId, Uuid>>>,
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) {
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let NewConversation {
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conversation_id,
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conversation,
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session_configured,
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} = match conversation_manager.new_conversation(config).await {
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Ok(res) => res,
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Err(e) => {
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let result = CallToolResult {
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content: vec![ContentBlock::TextContent(TextContent {
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r#type: "text".to_string(),
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text: format!("Failed to start Codex session: {e}"),
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annotations: None,
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})],
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is_error: Some(true),
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structured_content: None,
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};
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outgoing.send_response(id.clone(), result).await;
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return;
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}
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};
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let session_configured_event = Event {
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// Use a fake id value for now.
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id: "".to_string(),
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msg: EventMsg::SessionConfigured(session_configured.clone()),
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};
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outgoing
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.send_event_as_notification(
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&session_configured_event,
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Some(OutgoingNotificationMeta::new(Some(id.clone()))),
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)
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.await;
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// Use the original MCP request ID as the `sub_id` for the Codex submission so that
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// any events emitted for this tool-call can be correlated with the
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// originating `tools/call` request.
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let sub_id = match &id {
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RequestId::String(s) => s.clone(),
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RequestId::Integer(n) => n.to_string(),
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};
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running_requests_id_to_codex_uuid
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.lock()
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.await
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.insert(id.clone(), conversation_id);
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let submission = Submission {
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id: sub_id.clone(),
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op: Op::UserInput {
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items: vec![InputItem::Text {
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text: initial_prompt.clone(),
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}],
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},
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};
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if let Err(e) = conversation.submit_with_id(submission).await {
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tracing::error!("Failed to submit initial prompt: {e}");
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// unregister the id so we don't keep it in the map
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running_requests_id_to_codex_uuid.lock().await.remove(&id);
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return;
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}
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run_codex_tool_session_inner(
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conversation,
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outgoing,
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id,
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running_requests_id_to_codex_uuid,
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)
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.await;
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}
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pub async fn run_codex_tool_session_reply(
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conversation: Arc<CodexConversation>,
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outgoing: Arc<OutgoingMessageSender>,
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request_id: RequestId,
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prompt: String,
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running_requests_id_to_codex_uuid: Arc<Mutex<HashMap<RequestId, Uuid>>>,
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session_id: Uuid,
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) {
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running_requests_id_to_codex_uuid
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.lock()
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.await
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.insert(request_id.clone(), session_id);
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if let Err(e) = conversation
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.submit(Op::UserInput {
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items: vec![InputItem::Text { text: prompt }],
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})
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.await
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{
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tracing::error!("Failed to submit user input: {e}");
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// unregister the id so we don't keep it in the map
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running_requests_id_to_codex_uuid
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.lock()
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.await
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.remove(&request_id);
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return;
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}
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run_codex_tool_session_inner(
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conversation,
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outgoing,
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request_id,
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running_requests_id_to_codex_uuid,
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)
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.await;
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}
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async fn run_codex_tool_session_inner(
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codex: Arc<CodexConversation>,
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outgoing: Arc<OutgoingMessageSender>,
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request_id: RequestId,
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running_requests_id_to_codex_uuid: Arc<Mutex<HashMap<RequestId, Uuid>>>,
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) {
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let request_id_str = match &request_id {
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RequestId::String(s) => s.clone(),
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RequestId::Integer(n) => n.to_string(),
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};
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// Stream events until the task needs to pause for user interaction or
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// completes.
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loop {
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match codex.next_event().await {
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Ok(event) => {
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outgoing
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.send_event_as_notification(
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&event,
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Some(OutgoingNotificationMeta::new(Some(request_id.clone()))),
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)
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.await;
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match event.msg {
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EventMsg::ExecApprovalRequest(ExecApprovalRequestEvent {
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command,
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cwd,
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call_id,
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reason: _,
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}) => {
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handle_exec_approval_request(
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command,
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cwd,
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outgoing.clone(),
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codex.clone(),
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request_id.clone(),
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request_id_str.clone(),
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event.id.clone(),
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call_id,
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)
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.await;
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continue;
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}
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EventMsg::Error(err_event) => {
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// Return a response to conclude the tool call when the Codex session reports an error (e.g., interruption).
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let result = json!({
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"error": err_event.message,
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});
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outgoing.send_response(request_id.clone(), result).await;
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break;
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}
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EventMsg::ApplyPatchApprovalRequest(ApplyPatchApprovalRequestEvent {
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call_id,
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reason,
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grant_root,
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changes,
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}) => {
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handle_patch_approval_request(
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call_id,
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reason,
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grant_root,
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changes,
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outgoing.clone(),
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codex.clone(),
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request_id.clone(),
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request_id_str.clone(),
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event.id.clone(),
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)
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.await;
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continue;
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}
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EventMsg::TaskComplete(TaskCompleteEvent { last_agent_message }) => {
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let text = match last_agent_message {
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Some(msg) => msg.clone(),
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None => "".to_string(),
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};
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let result = CallToolResult {
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content: vec![ContentBlock::TextContent(TextContent {
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r#type: "text".to_string(),
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text,
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annotations: None,
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})],
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is_error: None,
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structured_content: None,
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};
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outgoing.send_response(request_id.clone(), result).await;
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// unregister the id so we don't keep it in the map
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running_requests_id_to_codex_uuid
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.lock()
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.await
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.remove(&request_id);
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break;
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}
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EventMsg::SessionConfigured(_) => {
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tracing::error!("unexpected SessionConfigured event");
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}
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EventMsg::AgentMessageDelta(_) => {
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// TODO: think how we want to support this in the MCP
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}
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EventMsg::AgentReasoningDelta(_) => {
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// TODO: think how we want to support this in the MCP
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}
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EventMsg::AgentMessage(AgentMessageEvent { .. }) => {
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// TODO: think how we want to support this in the MCP
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}
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EventMsg::AgentReasoningRawContent(_)
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| EventMsg::AgentReasoningRawContentDelta(_)
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| EventMsg::TaskStarted
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| EventMsg::TokenCount(_)
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| EventMsg::AgentReasoning(_)
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| EventMsg::AgentReasoningSectionBreak(_)
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| EventMsg::McpToolCallBegin(_)
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| EventMsg::McpToolCallEnd(_)
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| EventMsg::ExecCommandBegin(_)
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| EventMsg::ExecCommandOutputDelta(_)
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| EventMsg::ExecCommandEnd(_)
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| EventMsg::BackgroundEvent(_)
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| EventMsg::PatchApplyBegin(_)
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| EventMsg::PatchApplyEnd(_)
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| EventMsg::TurnDiff(_)
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| EventMsg::GetHistoryEntryResponse(_)
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| EventMsg::PlanUpdate(_)
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| EventMsg::ShutdownComplete => {
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// For now, we do not do anything extra for these
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// events. Note that
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// send(codex_event_to_notification(&event)) above has
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// already dispatched these events as notifications,
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// though we may want to do give different treatment to
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// individual events in the future.
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}
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}
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}
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Err(e) => {
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let result = CallToolResult {
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content: vec![ContentBlock::TextContent(TextContent {
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r#type: "text".to_string(),
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text: format!("Codex runtime error: {e}"),
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annotations: None,
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})],
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is_error: Some(true),
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// TODO(mbolin): Could present the error in a more
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// structured way.
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structured_content: None,
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};
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outgoing.send_response(request_id.clone(), result).await;
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break;
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}
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}
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}
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}
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