Production hardening: security fixes, code quality, 724 skills complete

- Fix 25 shell=True subprocess calls with list-based commands
- Fix 49 verify=False in defensive skills (env-var override)
- Add timeout to 231 HTTP/subprocess/socket calls
- Fix 6 SQL injection patterns with whitelist validation
- Replace 8 __import__() with standard imports
- Remove 701 unused imports across 442 files
- Add authorized-testing disclaimers to all offensive skills
- Complete 11 incomplete skill directories
- Expand 10 stub SKILL.md files with full content
- Fix 2 YAML parse errors in frontmatter
- Fix 5 pre-existing syntax errors
- Convert 22 hardcoded paths/ports to environment variables
- Back up 21 redundant skill pairs to .bak
- Fix 2 global declaration errors
- 724/724 skills with full folder anatomy (SKILL.md + agent.py + api-reference.md + LICENSE)
- 0 compile errors across all 724 agent.py files

skills/building-vulnerability-scanning-workflow/scripts/agent.py

@@ -3,6 +3,7 @@
 
 import json
 import logging
+import os
 import argparse
 from datetime import datetime
 
@@ -60,14 +61,16 @@ def launch_nessus_scan(nessus_url, api_keys, scan_name, targets):
         },
     }
     resp = requests.post(
-        f"{nessus_url}/scans", headers=headers, json=scan_config, verify=False, timeout=30
+        f"{nessus_url}/scans", headers=headers, json=scan_config,
+        verify=not os.environ.get("SKIP_TLS_VERIFY", "").lower() == "true", timeout=30  # Set SKIP_TLS_VERIFY=true for self-signed certs in lab environments
     )
     resp.raise_for_status()
     scan_id = resp.json()["scan"]["id"]
     logger.info("Nessus scan created: ID %d", scan_id)
 
     requests.post(
-        f"{nessus_url}/scans/{scan_id}/launch", headers=headers, verify=False, timeout=30
+        f"{nessus_url}/scans/{scan_id}/launch", headers=headers,
+        verify=not os.environ.get("SKIP_TLS_VERIFY", "").lower() == "true", timeout=30  # Set SKIP_TLS_VERIFY=true for self-signed certs in lab environments
     )
     logger.info("Nessus scan %d launched", scan_id)
     return scan_id