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/performing-thick-client-application-penetration-test/references/api-reference.md

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+# API Reference: Thick Client Penetration Testing
+
+## Analysis Tools
+
+| Tool | Purpose | Target |
+|------|---------|--------|
+| dnSpy | .NET decompilation and debugging | .NET Framework/Core apps |
+| ILSpy | .NET decompilation (read-only) | .NET assemblies |
+| JD-GUI / JADX | Java decompilation | JAR/APK files |
+| Ghidra / IDA Pro | Native binary reverse engineering | C/C++ executables |
+| Procmon | File/registry/network activity monitoring | Any Windows app |
+| Process Hacker | Process inspection, memory, DLLs | Running processes |
+| Burp Suite | HTTP/HTTPS traffic interception | Client-server communication |
+| Echo Mirage | TCP/UDP traffic interception | Non-HTTP protocols |
+| Frida | Dynamic instrumentation | Any platform |
+
+## Static Analysis Targets
+
+| Target | Search Pattern | Risk |
+|--------|---------------|------|
+| Hardcoded credentials | `password`, `secret`, `apikey` in strings | Critical |
+| Connection strings | `jdbc:`, `Server=`, `mongodb://` | Critical |
+| SQL queries | `SELECT`, `INSERT`, `UPDATE` | Medium |
+| URLs and endpoints | `http://`, `https://` | Info |
+| Disabled SSL validation | `ServerCertificateValidationCallback` | High |
+
+## DLL Hijacking Detection
+
+| Step | Tool | Action |
+|------|------|--------|
+| 1 | Procmon | Filter: `Result = NAME NOT FOUND`, `Path ends with .dll` |
+| 2 | Check | Verify if DLL search path includes writable directories |
+| 3 | Validate | Test with benign DLL in writable directory |
+
+## Local Storage Locations
+
+| Location | Type | Risk |
+|----------|------|------|
+| `%APPDATA%\<app>` | Config, SQLite | Credential storage |
+| `%LOCALAPPDATA%\<app>` | Cache, logs | Data leakage |
+| `HKCU\Software\<app>` | Registry settings | Stored credentials |
+| App install directory | Config files | Hardcoded secrets |
+
+## Python Libraries
+
+| Library | Version | Purpose |
+|---------|---------|---------|
+| `sqlite3` | stdlib | Audit local SQLite databases |
+| `re` | stdlib | Pattern matching for credentials/URLs |
+| `subprocess` | stdlib | Execute system analysis tools |
+| `pathlib` | stdlib | File system traversal |
+
+## References
+
+- OWASP Thick Client Top 10: https://owasp.org/www-project-thick-client-top-10/
+- dnSpy: https://github.com/dnSpy/dnSpy
+- Procmon: https://learn.microsoft.com/en-us/sysinternals/downloads/procmon
+- Frida: https://frida.re/docs/home/