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/analyzing-docker-container-forensics/scripts/agent.py

@@ -1,6 +1,7 @@
 #!/usr/bin/env python3
 """Docker container forensics agent for investigating compromised containers."""
 
+import shlex
 import subprocess
 import json
 import os
@@ -10,8 +11,10 @@ import datetime
 
 
 def run_cmd(cmd):
-    """Execute a shell command and return output."""
-    result = subprocess.run(cmd, shell=True, capture_output=True, text=True)
+    """Execute a command and return output."""
+    if isinstance(cmd, str):
+        cmd = shlex.split(cmd)
+    result = subprocess.run(cmd, capture_output=True, text=True, timeout=120)
     return result.stdout.strip(), result.stderr.strip(), result.returncode
 
 
@@ -134,9 +137,13 @@ def detect_suspicious_files(changes):
 
 def export_container(container_id, output_path):
     """Export container filesystem as a tarball for offline analysis."""
-    cmd = f"docker export {container_id} > {output_path}"
-    _, _, rc = run_cmd(cmd)
-    if rc == 0 and os.path.exists(output_path):
+    with open(output_path, "wb") as out_f:
+        result = subprocess.run(
+            ["docker", "export", container_id],
+            stdout=out_f, stderr=subprocess.PIPE,
+            timeout=120,
+        )
+    if result.returncode == 0 and os.path.exists(output_path):
         sha256 = hashlib.sha256()
         with open(output_path, "rb") as f:
             for chunk in iter(lambda: f.read(65536), b""):