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/conducting-man-in-the-middle-attack-simulation/scripts/agent.py

@@ -5,10 +5,10 @@
 import json
 import logging
 import argparse
-import subprocess
+import time
 from datetime import datetime
 
-from scapy.all import ARP, Ether, srp, send, sniff, IP, TCP, get_if_hwaddr, conf
+from scapy.all import ARP, Ether, srp, send, sniff, IP, TCP
 
 logging.basicConfig(level=logging.INFO, format="%(asctime)s [%(levelname)s] %(message)s")
 logger = logging.getLogger(__name__)
@@ -127,7 +127,7 @@ def run_mitm_simulation(target_ip, gateway_ip, interface, duration=30):
         for _ in range(duration):
             arp_spoof(target_ip, gateway_ip, target_mac)
             arp_spoof(gateway_ip, target_ip, gateway_mac)
-            __import__("time").sleep(1)
+            time.sleep(1)
     except KeyboardInterrupt:
         pass
     finally: