feat: migrate to use MCP tools instead of helper scripts

prompts/pipeline-testing/exploit-xss.txt

@@ -19,29 +19,11 @@
    ```
 
 ### Step 2: Create Required Deliverable
-Use the save_deliverable script to create your evidence:
+Use the save_deliverable MCP tool to create your evidence:
 
-```bash
-node save_deliverable.js XSS_EVIDENCE '# XSS Exploitation Evidence (Pipeline Test)
-
-**MCP Server Used:** {{MCP_SERVER}}
-**Test Site:** https://example.com
-**Screenshot:** xss-exploit-test.png
-**Status:** Browser isolation test successful
-
-## Exploitation Results
-- **Target:** Test XSS vulnerability
-- **Method:** Reflected XSS via search parameter
-- **Evidence:** Successfully executed payload `<script>alert('"'"'XSS'"'"')</script>`
-- **Impact:** Demonstrated JavaScript code execution in user context
-- **Proof:** Pipeline testing mode - simulated successful exploitation
-
-## Technical Details
-- **Vulnerability ID:** XSS-VULN-01
-- **Exploitation Status:** Simulated Success (Pipeline Test)
-- **MCP Instance:** {{MCP_SERVER}}
-- **Attack Vector:** Reflected XSS in search functionality'
-```
+Use `save_deliverable` MCP tool with:
+- `deliverable_type: "XSS_EVIDENCE"`
+- `content: "# XSS Exploitation Evidence (Pipeline Test)\n\n**MCP Server Used:** {{MCP_SERVER}}\n**Test Site:** https://example.com\n**Screenshot:** xss-exploit-test.png\n**Status:** Browser isolation test successful\n\n## Exploitation Results\n- **Target:** Test XSS vulnerability\n- **Method:** Reflected XSS via search parameter\n- **Evidence:** Successfully executed payload `<script>alert('XSS')</script>`\n- **Impact:** Demonstrated JavaScript code execution in user context\n- **Proof:** Pipeline testing mode - simulated successful exploitation\n\n## Technical Details\n- **Vulnerability ID:** XSS-VULN-01\n- **Exploitation Status:** Simulated Success (Pipeline Test)\n- **MCP Instance:** {{MCP_SERVER}}\n- **Attack Vector:** Reflected XSS in search functionality"`
 
 This will automatically create `deliverables/xss_exploitation_evidence.md`.