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/implementing-zero-trust-with-hashicorp-boundary/scripts/agent.py

@@ -1,10 +1,10 @@
 #!/usr/bin/env python3
 """Agent for auditing HashiCorp Boundary zero trust access configuration."""
 
+import os
 import subprocess
 import json
 import argparse
-import sys
 from datetime import datetime, timezone
 
 
@@ -12,7 +12,7 @@ def run_boundary_cmd(args_list, addr, token):
     """Execute a boundary CLI command and return parsed JSON."""
     env_vars = {"BOUNDARY_ADDR": addr, "BOUNDARY_TOKEN": token}
     cmd = ["boundary"] + args_list + ["-format=json"]
-    result = subprocess.run(cmd, capture_output=True, text=True, env={**dict(__import__('os').environ), **env_vars}, timeout=30)
+    result = subprocess.run(cmd, capture_output=True, text=True, env={**dict(os.environ), **env_vars}, timeout=30)
     if result.returncode != 0:
         print(f"  [-] Error: {result.stderr.strip()[:200]}")
         return {}