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-identity-verification-for-zero-trust/SKILL.md

@@ -1,6 +1,6 @@
 ---
 name: implementing-identity-verification-for-zero-trust
-description: Implementing Identity Verification For Zero Trust
+description: Implement continuous identity verification for zero trust using phishing-resistant MFA (FIDO2/WebAuthn), risk-based conditional access, and identity governance aligned with the CISA Zero Trust Maturity Model.
 domain: cybersecurity
 subdomain: security-operations
 tags: [cybersecurity]
@@ -95,7 +95,7 @@ Conditional access policies evaluate multiple signals (user risk level, sign-in
 ### Identity Threat Detection
 AI-driven analytics detect compromised identities through impossible travel detection, anomalous sign-in patterns, credential stuffing detection, and token replay attacks.
 
-## Procedure
+## Workflow
 
 ### Phase 1: Identity Infrastructure