Add benchmark agent

.env.example

@@ -36,3 +36,20 @@ LANGSMITH_PROJECT="Agentic Code Optimization"
 # ============================================================================
 # Set to true to enable verbose logging
 # LANGCHAIN_DEBUG=true
+
+# ============================================================================
+# Benchmark Configuration (optional)
+# ============================================================================
+# Command to run baseline/post benchmarks
+# Example:
+export BENCHMARK_CMD="cd DeathStarBench/socialNetwork && \
+docker compose build user-service && \
+docker compose up -d && \
+docker run --rm --platform linux/amd64 \
+  --network socialnetwork_default \
+  -e max_user_index=962 \
+  -v /Users/peng397/Desktop/agentic-code-optimization/DeathStarBench/socialNetwork/wrk2/scripts/social-network/mixed-workload.lua:/tmp/sn_mixed.lua:ro \
+  deathstarbench/wrk2-client \
+  /usr/local/bin/wrk -D exp -t 12 -c 400 -d 30 -L \
+  -s /tmp/sn_mixed.lua \
+  http://nginx-thrift:8080/wrk2-api/home-timeline/read -R 200"