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/detecting-attacks-on-historian-servers/scripts/agent.py

@@ -2,6 +2,7 @@
 """Historian server attack detection agent for ICS/SCADA environments."""
 
 import json
+import os
 import sys
 import argparse
 import socket
@@ -51,7 +52,8 @@ def check_pi_web_api(host, username=None, password=None):
     results = {"host": host, "checks": []}
 
     try:
-        resp = requests.get(f"{base}/system", auth=auth, verify=False, timeout=10)
+        resp = requests.get(f"{base}/system", auth=auth,
+                            verify=not os.environ.get("SKIP_TLS_VERIFY", "").lower() == "true", timeout=10)  # Set SKIP_TLS_VERIFY=true for self-signed certs in lab environments
         if resp.status_code == 200:
             data = resp.json()
             results["product_version"] = data.get("ProductTitle", "")
@@ -67,7 +69,8 @@ def check_pi_web_api(host, username=None, password=None):
         results["error"] = str(e)
 
     try:
-        resp = requests.get(f"{base}/points", auth=auth, verify=False,
+        resp = requests.get(f"{base}/points", auth=auth,
+                            verify=not os.environ.get("SKIP_TLS_VERIFY", "").lower() == "true",
                             params={"maxCount": 10}, timeout=10)
         if resp.status_code == 200:
             points = resp.json().get("Items", [])