Update regenerate.sh (#2832)

tests/integration/regenerate.sh

@@ -158,8 +158,7 @@ regenerate_with_llm() {
     launch_http_server
   fi
 
-  rm -rf $WORKSPACE_BASE
-  mkdir -p $WORKSPACE_BASE
+  rm -rf $WORKSPACE_BASE/*
   if [ -d "tests/integration/workspace/$test_name" ]; then
     cp -r tests/integration/workspace/$test_name/* $WORKSPACE_BASE
   fi
@@ -197,7 +196,7 @@ if [ "$num_of_tests" -ne "${#test_names[@]}" ]; then
 fi
 
 rm -rf logs
-rm -rf $WORKSPACE_BASE
+rm -rf $WORKSPACE_BASE/*
 for ((i = 0; i < num_of_tests; i++)); do
   task=${tasks[i]}
   test_name=${test_names[i]}
@@ -216,8 +215,7 @@ for ((i = 0; i < num_of_tests; i++)); do
     fi
 
     echo -e "\n\n\n\n========STEP 1: Running $test_name for $agent========\n\n\n\n"
-    rm -rf $WORKSPACE_BASE
-    mkdir $WORKSPACE_BASE
+    rm -rf $WORKSPACE_BASE/*
     if [ -d "tests/integration/workspace/$test_name" ]; then
       cp -r "tests/integration/workspace/$test_name"/* $WORKSPACE_BASE
     fi