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/analyzing-api-gateway-access-logs/references/api-reference.md

@@ -0,0 +1,58 @@
+# API Reference: Analyzing API Gateway Access Logs
+
+## AWS API Gateway Log Fields
+
+```json
+{
+  "requestId": "abc-123",
+  "ip": "203.0.113.50",
+  "httpMethod": "GET",
+  "resourcePath": "/api/users/{id}",
+  "status": 200,
+  "requestTime": "2025-03-15T14:00:00Z",
+  "responseLength": 1024
+}
+```
+
+## Pandas Log Analysis
+
+```python
+import pandas as pd
+
+df = pd.read_json("access_logs.json", lines=True)
+
+# BOLA detection
+df.groupby("user_id")["resource_id"].nunique()
+
+# Auth failure surge
+df[df["status_code"] == 401].groupby("source_ip").size()
+
+# Request velocity
+df.set_index("timestamp").resample("1min").size()
+```
+
+## OWASP API Top 10 Patterns
+
+| Risk | Detection Pattern |
+|------|-------------------|
+| BOLA (API1) | User accessing > 50 unique resource IDs |
+| Broken Auth (API2) | > 100 401/403 from single IP |
+| Excessive Data (API3) | Response size > 10x average |
+| Rate Limit (API4) | > 100 req/min from single IP |
+| BFLA (API5) | DELETE/PUT on read-only endpoints |
+| Injection (API8) | SQL/NoSQL patterns in params |
+
+## Injection Regex Patterns
+
+```python
+sql = r"union\s+select|drop\s+table|'\s*or\s+'1'"
+nosql = r"\$ne|\$gt|\$regex|\$where"
+xss = r"<script|javascript:|onerror="
+path_traversal = r"\.\./\.\./|/etc/passwd"
+```
+
+### References
+
+- OWASP API Security Top 10: https://owasp.org/API-Security/
+- AWS API Gateway logging: https://docs.aws.amazon.com/apigateway/latest/developerguide/
+- pandas: https://pandas.pydata.org/docs/