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/exploiting-websocket-vulnerabilities/references/api-reference.md

@@ -0,0 +1,62 @@
+# API Reference: WebSocket Vulnerability Assessment Agent
+
+## Dependencies
+
+| Library | Version | Purpose |
+|---------|---------|---------|
+| websockets | >=11.0 | Async WebSocket client for connection and message testing |
+| requests | >=2.28 | HTTP-level WebSocket handshake inspection |
+
+## CLI Usage
+
+```bash
+python scripts/agent.py \
+  --url wss://target.example.com/ws \
+  --cookie "session=abc123" \
+  --output ws_report.json
+```
+
+## Functions
+
+### `discover_ws_endpoints(base_url) -> list`
+Probes 9 common WebSocket paths with upgrade headers to find endpoints.
+
+### `test_origin_validation(ws_url, cookie) -> dict`
+Sends WebSocket upgrade requests with evil Origin headers. Acceptance indicates CSWSH risk.
+
+### `test_no_auth_connect(ws_url) -> dict` (async)
+Attempts WebSocket connection without any authentication tokens.
+
+### `test_message_injection(ws_url, cookie) -> list` (async)
+Sends 6 injection payloads (SQLi, XSS, SSTI, path traversal, command injection) and checks responses.
+
+### `test_idor_channels(ws_url, cookie, channel_ids) -> list` (async)
+Subscribes to channels 1-5 to test for IDOR in channel access.
+
+### `test_rate_limiting(ws_url, cookie, count) -> dict` (async)
+Sends 100 rapid messages and checks if the connection is throttled or closed.
+
+### `run_assessment(ws_url, cookie) -> dict`
+Orchestrates all tests and compiles findings.
+
+## websockets Library Usage
+
+| Method | Purpose |
+|--------|---------|
+| `websockets.connect(url, extra_headers)` | Async context manager for WS connection |
+| `ws.send(data)` | Send a text frame |
+| `ws.recv()` | Receive next frame |
+| `asyncio.wait_for(ws.recv(), timeout)` | Receive with timeout |
+
+## Output Schema
+
+```json
+{
+  "target": "wss://target.example.com/ws",
+  "origin_validation": {"cswsh_vulnerable": true},
+  "unauthenticated_access": {"connected": false},
+  "injection_tests": [{"payload": {"query": "' OR 1=1--"}, "suspicious": true}],
+  "rate_limiting": {"rate_limited": false},
+  "findings": ["HIGH: Cross-Site WebSocket Hijacking possible"]
+}
+```