From af5e26175a4cdc433a6a65cb6e3bed1c2e412ccf Mon Sep 17 00:00:00 2001
From: Ben Brandt <benjamin.j.brandt@gmail.com>
Date: Mon, 2 Mar 2026 16:17:05 +0100
Subject: [PATCH] agent: Add subagent info to telemetry events (#50492)

- **Add parent_session_id to agent thread feedback submission**
- **Add more parent session ids to events**

Release Notes:

- N/A

---------

Co-authored-by: Bennet Bo Fenner <bennetbo@gmx.de>
---
 crates/acp_thread/src/acp_thread.rs                |  2 ++
 crates/agent/src/thread.rs                         |  4 ++++
 crates/agent_ui/src/connection_view/thread_view.rs | 11 +++++++++++
 crates/cloud_api_types/src/cloud_api_types.rs      |  1 +
 4 files changed, 18 insertions(+)

diff --git a/crates/acp_thread/src/acp_thread.rs b/crates/acp_thread/src/acp_thread.rs
index 46797130c0cebb605c6820f4d04fd2e989977617..e6da8f3f901b41c0a59d73920c3036fc72d1b906 100644
--- a/crates/acp_thread/src/acp_thread.rs
+++ b/crates/acp_thread/src/acp_thread.rs
@@ -1600,6 +1600,7 @@ impl AcpThread {
 
         let agent_telemetry_id = self.connection().telemetry_id();
         let session = self.session_id();
+        let parent_session_id = self.parent_session_id();
         if let ToolCallStatus::Completed | ToolCallStatus::Failed = status {
             let status = if matches!(status, ToolCallStatus::Completed) {
                 "completed"
@@ -1610,6 +1611,7 @@ impl AcpThread {
                 "Agent Tool Call Completed",
                 agent_telemetry_id,
                 session,
+                parent_session_id,
                 status
             );
         }
diff --git a/crates/agent/src/thread.rs b/crates/agent/src/thread.rs
index 64ab5795e7dadcb86f4df45e08157c851d4c7c25..0825910e78af2950b895c17699c8cd623b359727 100644
--- a/crates/agent/src/thread.rs
+++ b/crates/agent/src/thread.rs
@@ -1739,6 +1739,9 @@ impl Thread {
             telemetry::event!(
                 "Agent Thread Completion",
                 thread_id = this.read_with(cx, |this, _| this.id.to_string())?,
+                parent_thread_id = this.read_with(cx, |this, _| this
+                    .parent_thread_id()
+                    .map(|id| id.to_string()))?,
                 prompt_id = this.read_with(cx, |this, _| this.prompt_id.to_string())?,
                 model = model.telemetry_id(),
                 model_provider = model.provider_id().to_string(),
@@ -1997,6 +2000,7 @@ impl Thread {
                 telemetry::event!(
                     "Agent Thread Completion Usage Updated",
                     thread_id = self.id.to_string(),
+                    parent_thread_id = self.parent_thread_id().map(|id| id.to_string()),
                     prompt_id = self.prompt_id.to_string(),
                     model = self.model.as_ref().map(|m| m.telemetry_id()),
                     model_provider = self.model.as_ref().map(|m| m.provider_id().to_string()),
diff --git a/crates/agent_ui/src/connection_view/thread_view.rs b/crates/agent_ui/src/connection_view/thread_view.rs
index f9d5311983c5f1a0b53504fc88b97ef8f2e953c4..cd8becbded396afa5c8eb4a9136db18f63e4a535 100644
--- a/crates/agent_ui/src/connection_view/thread_view.rs
+++ b/crates/agent_ui/src/connection_view/thread_view.rs
@@ -45,6 +45,7 @@ impl ThreadFeedbackState {
             }
         }
         let session_id = thread.read(cx).session_id().clone();
+        let parent_session_id = thread.read(cx).parent_session_id().cloned();
         let agent_telemetry_id = thread.read(cx).connection().telemetry_id();
         let task = telemetry.thread_data(&session_id, cx);
         let rating = match feedback {
@@ -60,6 +61,7 @@ impl ThreadFeedbackState {
                     organization_id: organization.map(|organization| organization.id.clone()),
                     agent: agent_telemetry_id.to_string(),
                     session_id: session_id.to_string(),
+                    parent_session_id: parent_session_id.map(|id| id.to_string()),
                     rating: rating.to_string(),
                     thread,
                 })
@@ -804,6 +806,7 @@ impl ThreadView {
         cx: &mut Context<Self>,
     ) {
         let session_id = self.thread.read(cx).session_id().clone();
+        let parent_session_id = self.thread.read(cx).parent_session_id().cloned();
         let agent_telemetry_id = self.thread.read(cx).connection().telemetry_id();
         let thread = self.thread.downgrade();
 
@@ -858,6 +861,7 @@ impl ThreadView {
                     "Agent Message Sent",
                     agent = agent_telemetry_id,
                     session = session_id,
+                    parent_session_id = parent_session_id.as_ref().map(|id| id.to_string()),
                     model = model_id,
                     mode = mode_id
                 );
@@ -877,6 +881,7 @@ impl ThreadView {
                 "Agent Turn Completed",
                 agent = agent_telemetry_id,
                 session = session_id,
+                parent_session_id = parent_session_id.as_ref().map(|id| id.to_string()),
                 model = model_id,
                 mode = mode_id,
                 status,
@@ -985,11 +990,17 @@ impl ThreadView {
 
         let agent_telemetry_id = self.thread.read(cx).connection().telemetry_id();
         let session_id = self.thread.read(cx).session_id().clone();
+        let parent_session_id = self
+            .thread
+            .read(cx)
+            .parent_session_id()
+            .map(|id| id.to_string());
 
         telemetry::event!(
             "Agent Panel Error Shown",
             agent = agent_telemetry_id,
             session_id = session_id,
+            parent_session_id = parent_session_id,
             kind = error_kind,
             acp_error_code = acp_error_code,
             message = message,
diff --git a/crates/cloud_api_types/src/cloud_api_types.rs b/crates/cloud_api_types/src/cloud_api_types.rs
index 5f86dce21eea6f76a426fa1bca735be87a513ee2..2d457fc6630d5b32f049e67a6a460047e925973a 100644
--- a/crates/cloud_api_types/src/cloud_api_types.rs
+++ b/crates/cloud_api_types/src/cloud_api_types.rs
@@ -62,6 +62,7 @@ pub struct SubmitAgentThreadFeedbackBody {
     pub organization_id: Option<OrganizationId>,
     pub agent: String,
     pub session_id: String,
+    pub parent_session_id: Option<String>,
     pub rating: String,
     pub thread: serde_json::Value,
 }