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-static-malware-analysis-with-pe-studio/references/api-reference.md

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+# API Reference: Static Malware Analysis with PE Studio Agent
+
+## Overview
+
+Performs automated static analysis of Windows PE binaries using pefile to inspect headers, sections, imports, strings, and resources for malware indicators.
+
+## Dependencies
+
+| Package | Version | Purpose |
+|---------|---------|---------|
+| pefile | >= 2023.2.7 | PE file parsing and section analysis |
+| hashlib | stdlib | MD5, SHA-1, SHA-256 hash computation |
+
+## Core Functions
+
+### `compute_hashes(filepath)`
+Generates MD5, SHA-1, SHA-256 hashes and file size.
+- **Returns**: `dict` with `md5`, `sha1`, `sha256`, `size`
+
+### `analyze_sections(pe)`
+Inspects PE sections for entropy, virtual/raw size ratios, and packing indicators.
+- **Flags**: `HIGH_ENTROPY` (>7.0), `HIGH_VR_RATIO` (>10x)
+- **Returns**: `list[dict]` - section analysis entries
+
+### `detect_packer(pe)`
+Identifies known packer section names (UPX, ASPack, VMProtect, Themida) and low import counts.
+- **Returns**: `list[str]` - detected packer names
+
+### `analyze_imports(pe)`
+Categorizes imports into Process Injection, Keylogging, Persistence, Evasion, Network, Crypto.
+- **Returns**: `list[dict]` with `category`, `dll`, `function`
+
+### `extract_strings(filepath, min_length=6)`
+Extracts ASCII strings and classifies into URLs, IPs, emails, registry keys, file paths.
+- **Returns**: `dict[str, list[str]]` - categorized string indicators
+
+### `analyze_resources(pe)`
+Inspects PE resources for high-entropy data and embedded PE files.
+- **Returns**: `list[dict]` with `type_id`, `size`, `entropy`, `flags`
+
+### `analyze_pe(filepath)`
+Full analysis pipeline producing structured report.
+- **Returns**: `dict` - complete analysis report
+
+## Suspicious Import Categories
+
+| Category | Example Functions |
+|----------|-------------------|
+| Process Injection | VirtualAllocEx, WriteProcessMemory, CreateRemoteThread |
+| Keylogging | GetAsyncKeyState, SetWindowsHookExA |
+| Persistence | RegSetValueExA, CreateServiceA |
+| Evasion | IsDebuggerPresent, CheckRemoteDebuggerPresent |
+| Network | InternetOpenA, URLDownloadToFileA, WSAStartup |
+| Crypto | CryptEncrypt, CryptDecrypt |
+
+## Usage
+
+```bash
+python agent.py suspect.exe
+```