fix: normalize claude system events and refresh tests

server/packages/sandbox-agent/tests/http_sse_snapshots.rs

@@ -19,7 +19,7 @@ use tower_http::cors::CorsLayer;
 const PROMPT: &str = "Reply with exactly the single word OK.";
 const PERMISSION_PROMPT: &str = "List files in the current directory using available tools.";
 const QUESTION_PROMPT: &str =
-    "Ask the user a multiple-choice question with options yes/no using any built-in AskUserQuestion tool, then wait.";
+    "Use the AskUserQuestion tool to ask exactly one yes/no question, then wait for a reply. Do not answer yourself.";
 
 struct TestApp {
     app: Router,
@@ -1022,7 +1022,7 @@ async fn approval_flow_snapshots() {
         }
 
         let question_reply_session = format!("question-reply-{}", config.agent.as_str());
-        create_session(&app.app, config.agent, &question_reply_session, test_permission_mode(config.agent)).await;
+        create_session(&app.app, config.agent, &question_reply_session, "plan").await;
         let status = send_status(
             &app.app,
             Method::POST,
@@ -1083,7 +1083,7 @@ async fn approval_flow_snapshots() {
         }
 
         let question_reject_session = format!("question-reject-{}", config.agent.as_str());
-        create_session(&app.app, config.agent, &question_reject_session, test_permission_mode(config.agent)).await;
+        create_session(&app.app, config.agent, &question_reject_session, "plan").await;
         let status = send_status(
             &app.app,
             Method::POST,

server/packages/sandbox-agent/tests/snapshots/http_sse_snapshots__approval_flow_snapshots@permission_events_claude.snap

@@ -1,6 +1,5 @@
 ---
 source: server/packages/sandbox-agent/tests/http_sse_snapshots.rs
-assertion_line: 978
 expression: normalize_events(&permission_events)
 ---
 - agent: claude
@@ -9,8 +8,10 @@ expression: normalize_events(&permission_events)
   started:
     message: session.created
 - agent: claude
-  kind: unknown
+  kind: started
   seq: 2
+  started:
+    message: system.init
 - agent: claude
   kind: message
   message:

server/packages/sandbox-agent/tests/snapshots/http_sse_snapshots__approval_flow_snapshots@question_reject_events_claude.snap

@@ -1,6 +1,5 @@
 ---
 source: server/packages/sandbox-agent/tests/http_sse_snapshots.rs
-assertion_line: 1100
 expression: normalize_events(&reject_events)
 ---
 - agent: claude
@@ -9,8 +8,10 @@ expression: normalize_events(&reject_events)
   started:
     message: session.created
 - agent: claude
-  kind: unknown
+  kind: started
   seq: 2
+  started:
+    message: system.init
 - agent: claude
   kind: message
   message:

server/packages/sandbox-agent/tests/snapshots/http_sse_snapshots__approval_flow_snapshots@question_reply_events_claude.snap

@@ -8,8 +8,10 @@ expression: normalize_events(&question_events)
   started:
     message: session.created
 - agent: claude
-  kind: unknown
+  kind: started
   seq: 2
+  started:
+    message: system.init
 - agent: claude
   kind: message
   message:

server/packages/sandbox-agent/tests/snapshots/http_sse_snapshots__run_concurrency_snapshot@concurrency_events_claude.snap

@@ -1,6 +1,5 @@
 ---
 source: server/packages/sandbox-agent/tests/http_sse_snapshots.rs
-assertion_line: 1232
 expression: snapshot
 ---
 session_a:
@@ -10,8 +9,10 @@ session_a:
     started:
       message: session.created
   - agent: claude
-    kind: unknown
+    kind: started
     seq: 2
+    started:
+      message: system.init
   - agent: claude
     kind: message
     message:
@@ -27,8 +28,10 @@ session_b:
     started:
       message: session.created
   - agent: claude
-    kind: unknown
+    kind: started
     seq: 2
+    started:
+      message: system.init
   - agent: claude
     kind: message
     message:

server/packages/sandbox-agent/tests/snapshots/http_sse_snapshots__run_http_events_snapshot@http_events_claude.snap

@@ -1,6 +1,5 @@
 ---
 source: server/packages/sandbox-agent/tests/http_sse_snapshots.rs
-assertion_line: 721
 expression: normalized
 ---
 - agent: claude
@@ -9,8 +8,10 @@ expression: normalized
   started:
     message: session.created
 - agent: claude
-  kind: unknown
+  kind: started
   seq: 2
+  started:
+    message: system.init
 - agent: claude
   kind: message
   message:

server/packages/sandbox-agent/tests/snapshots/http_sse_snapshots__run_sse_events_snapshot@sse_events_claude.snap

@@ -1,6 +1,5 @@
 ---
 source: server/packages/sandbox-agent/tests/http_sse_snapshots.rs
-assertion_line: 729
 expression: normalized
 ---
 - agent: claude
@@ -9,8 +8,10 @@ expression: normalized
   started:
     message: session.created
 - agent: claude
-  kind: unknown
+  kind: started
   seq: 2
+  started:
+    message: system.init
 - agent: claude
   kind: message
   message: