diff --git a/install-claude-code.sh b/install-claude-code.sh
index b868b20..98cfcfd 100755
--- a/install-claude-code.sh
+++ b/install-claude-code.sh
@@ -502,7 +502,7 @@ detect_coding_helper_components() {
     fi
 
     # 2. Interactive wizard (part of core, but check if wizard can run)
-    if command -v chelper &> /dev/null; then
+    if command -v chelper &> /dev/null || npm list -g @z_ai/coding-helper &> /dev/null 2>&1; then
         status_json+='"wizard":true,'
     else
         status_json+='"wizard":false,'
@@ -539,7 +539,7 @@ detect_coding_helper_components() {
     fi
 
     # 6. Bilingual interface (inherent to coding-helper)
-    if command -v chelper &> /dev/null; then
+    if command -v chelper &> /dev/null || npm list -g @z_ai/coding-helper &> /dev/null 2>&1; then
         status_json+='"bilingual":true,'
     else
         status_json+='"bilingual":false,'
@@ -697,18 +697,41 @@ install_coding_helper() {
     fi
 
     # Install the helper
-    if npm install -g @z_ai/coding-helper 2>/dev/null; then
-        log_success "coding-helper installed successfully"
-        echo ""
-        echo -e "${CYAN}You can now run:${NC} ${YELLOW}chelper${NC} ${CYAN}or${NC} ${YELLOW}npx @z_ai/coding-helper${NC}"
-        echo ""
-        read -p "Launch coding-helper wizard now? [y/N] " -n 1 -r launch_helper < /dev/tty
-        echo ""
-        if [[ $launch_helper =~ ^[Yy]$ ]]; then
-            launch_coding_helper
+    local install_output
+    install_output=$(npm install -g @z_ai/coding-helper 2>&1)
+    local install_exit_code=$?
+
+    if [ $install_exit_code -eq 0 ]; then
+        # Verify installation
+        if npm list -g @z_ai/coding-helper &> /dev/null 2>&1; then
+            log_success "coding-helper installed and verified!"
+            echo ""
+            echo -e "${CYAN}You can now run:${NC} ${YELLOW}npx @z_ai/coding-helper${NC}"
+            echo ""
+            read -p "Launch coding-helper wizard now? [y/N] " -n 1 -r launch_helper < /dev/tty
+            echo ""
+            if [[ $launch_helper =~ ^[Yy]$ ]]; then
+                launch_coding_helper
+            fi
+        else
+            log_warn "Installation appeared to succeed but verification failed"
+            echo ""
+            echo -e "${YELLOW}Installation output:${NC}"
+            echo "$install_output"
+            echo ""
+            echo -e "${CYAN}You can try running manually:${NC}"
+            echo -e "  ${YELLOW}npx @z_ai/coding-helper${NC}"
         fi
     else
-        log_warn "Installation completed. You can run manually with:"
+        log_error "Installation failed!"
+        echo ""
+        echo -e "${YELLOW}Error output:${NC}"
+        echo "$install_output"
+        echo ""
+        echo -e "${CYAN}You can try installing manually:${NC}"
+        echo -e "  ${YELLOW}npm install -g @z_ai/coding-helper${NC}"
+        echo ""
+        echo -e "${CYAN}Or run without installation:${NC}"
         echo -e "  ${YELLOW}npx @z_ai/coding-helper${NC}"
     fi
 }