Add folder anatomy (scripts/agent.py + references/api-reference.md) for 648 cybersecurity skills

Complete skill folder anatomy across all cybersecurity skills:
- scripts/agent.py: 80-150 line Python agents using real libraries (impacket,
  boto3, azure-mgmt-*, kubernetes, pefile, yara, scapy, shodan, stix2, etc.)
- references/api-reference.md: real API documentation with method signatures
- LICENSE: MIT license for all skill folders

skills/implementing-security-chaos-engineering/references/api-reference.md

@@ -0,0 +1,52 @@
+# API Reference: Implementing Security Chaos Engineering
+
+## Experiment Pattern
+
+```python
+def run_experiment(setup_fn, verify_fn, rollback_fn, timeout=300):
+    try:
+        setup_fn()       # Introduce failure
+        result = verify_fn(timeout)  # Check detection
+    finally:
+        rollback_fn()    # Always restore
+    return result
+```
+
+## AWS boto3 (Chaos Actions)
+
+```python
+import boto3
+
+# Open security group
+ec2 = boto3.client("ec2")
+ec2.authorize_security_group_ingress(GroupId="sg-xxx",
+    IpProtocol="tcp", FromPort=22, ToPort=22, CidrIp="0.0.0.0/0")
+# Rollback
+ec2.revoke_security_group_ingress(...)
+
+# Stop CloudTrail
+ct = boto3.client("cloudtrail")
+ct.stop_logging(Name="main-trail")
+ct.start_logging(Name="main-trail")  # rollback
+
+# Check Config compliance
+config = boto3.client("config")
+config.get_compliance_details_by_config_rule(
+    ConfigRuleName="restricted-ssh",
+    ComplianceTypes=["NON_COMPLIANT"])
+```
+
+## Experiment Catalog
+
+| Experiment | Detection Target | SLA |
+|-----------|-----------------|-----|
+| Open SG 0.0.0.0/0 | AWS Config Rule | < 5 min |
+| Create admin user | GuardDuty | < 15 min |
+| Stop CloudTrail | CloudWatch alarm | < 5 min |
+| Public S3 bucket | Config / Macie | < 10 min |
+
+### References
+
+- AWS Config Rules: https://docs.aws.amazon.com/config/latest/developerguide/
+- GuardDuty: https://docs.aws.amazon.com/guardduty/
+- Security Chaos Engineering book: https://www.oreilly.com/library/view/security-chaos-engineering/