Resolve merge conflict in stream-parser.ts and improve benchify integration error handling; implement batch execution for deferred str_replace operations to improve reliability and observability.

🤖 Generated with Codebuff
Co-Authored-By: Codebuff <noreply@codebuff.com>

Author: brandonkachen

backend/package.json

@@ -24,6 +24,7 @@
   },
   "dependencies": {
     "@ai-sdk/google-vertex": "3.0.6",
+    "benchify": "^0.1.0-alpha.41",
     "@ai-sdk/openai": "2.0.11",
     "@codebuff/billing": "workspace:*",
     "@codebuff/common": "workspace:*",

backend/src/run-agent-step.ts

@@ -327,7 +327,6 @@ export const runAgentStep = async (
     state,
     fullResponse: fullResponseAfterStream,
     fullResponseChunks,
-    messageId,
   } = await processStreamWithTools({
     stream,
     ws,
@@ -435,7 +434,7 @@ export const runAgentStep = async (
     agentState,
     fullResponse,
     shouldEndTurn,
-    messageId,
+    messageId: null,
   }
 }