Files
codex/codex-rs/mcp-server/src/conversation_loop.rs
Gabriel Peal 1f3318c1c5 Add a TurnDiffTracker to create a unified diff for an entire turn (#1770)
This lets us show an accumulating diff across all patches in a turn.
Refer to the docs for TurnDiffTracker for implementation details.

There are multiple ways this could have been done and this felt like the
right tradeoff between reliability and completeness:
*Pros*
* It will pick up all changes to files that the model touched including
if they prettier or another command that updates them.
* It will not pick up changes made by the user or other agents to files
it didn't modify.

*Cons*
* It will pick up changes that the user made to a file that the model
also touched
* It will not pick up changes to codegen or files that were not modified
with apply_patch
2025-08-04 11:57:04 -04:00

123 lines
4.8 KiB
Rust

use std::sync::Arc;
use crate::exec_approval::handle_exec_approval_request;
use crate::outgoing_message::OutgoingMessageSender;
use crate::outgoing_message::OutgoingNotificationMeta;
use crate::patch_approval::handle_patch_approval_request;
use codex_core::Codex;
use codex_core::protocol::AgentMessageEvent;
use codex_core::protocol::ApplyPatchApprovalRequestEvent;
use codex_core::protocol::EventMsg;
use codex_core::protocol::ExecApprovalRequestEvent;
use mcp_types::RequestId;
use tracing::error;
pub async fn run_conversation_loop(
codex: Arc<Codex>,
outgoing: Arc<OutgoingMessageSender>,
request_id: RequestId,
) {
let request_id_str = match &request_id {
RequestId::String(s) => s.clone(),
RequestId::Integer(n) => n.to_string(),
};
// Stream events until the task needs to pause for user interaction or
// completes.
loop {
match codex.next_event().await {
Ok(event) => {
outgoing
.send_event_as_notification(
&event,
Some(OutgoingNotificationMeta::new(Some(request_id.clone()))),
)
.await;
match event.msg {
EventMsg::ExecApprovalRequest(ExecApprovalRequestEvent {
command,
cwd,
call_id,
reason: _,
}) => {
handle_exec_approval_request(
command,
cwd,
outgoing.clone(),
codex.clone(),
request_id.clone(),
request_id_str.clone(),
event.id.clone(),
call_id,
)
.await;
continue;
}
EventMsg::Error(_) => {
error!("Codex runtime error");
}
EventMsg::ApplyPatchApprovalRequest(ApplyPatchApprovalRequestEvent {
call_id,
reason,
grant_root,
changes,
}) => {
handle_patch_approval_request(
call_id,
reason,
grant_root,
changes,
outgoing.clone(),
codex.clone(),
request_id.clone(),
request_id_str.clone(),
event.id.clone(),
)
.await;
continue;
}
EventMsg::TaskComplete(_) => {}
EventMsg::SessionConfigured(_) => {
tracing::error!("unexpected SessionConfigured event");
}
EventMsg::AgentMessageDelta(_) => {
// TODO: think how we want to support this in the MCP
}
EventMsg::AgentReasoningDelta(_) => {
// TODO: think how we want to support this in the MCP
}
EventMsg::AgentMessage(AgentMessageEvent { .. }) => {
// TODO: think how we want to support this in the MCP
}
EventMsg::TaskStarted
| EventMsg::TokenCount(_)
| EventMsg::AgentReasoning(_)
| EventMsg::McpToolCallBegin(_)
| EventMsg::McpToolCallEnd(_)
| EventMsg::ExecCommandBegin(_)
| EventMsg::ExecCommandEnd(_)
| EventMsg::TurnDiff(_)
| EventMsg::BackgroundEvent(_)
| EventMsg::ExecCommandOutputDelta(_)
| EventMsg::PatchApplyBegin(_)
| EventMsg::PatchApplyEnd(_)
| EventMsg::GetHistoryEntryResponse(_)
| EventMsg::PlanUpdate(_)
| EventMsg::ShutdownComplete => {
// For now, we do not do anything extra for these
// events. Note that
// send(codex_event_to_notification(&event)) above has
// already dispatched these events as notifications,
// though we may want to do give different treatment to
// individual events in the future.
}
}
}
Err(e) => {
error!("Codex runtime error: {e}");
}
}
}
}