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-cisa-zero-trust-maturity-model/references/api-reference.md

@@ -0,0 +1,64 @@
+# API Reference: CISA Zero Trust Maturity Model Assessment Agent
+
+## Dependencies
+
+| Library | Version | Purpose |
+|---------|---------|---------|
+| (stdlib only) | Python 3.8+ | JSON processing, assessment logic |
+
+## CLI Usage
+
+```bash
+python scripts/agent.py \
+  --data /assessments/zt_responses.json \
+  --output-dir /reports/ \
+  --output ztmm_report.json
+```
+
+## Functions
+
+### `assess_control(control, implemented, maturity) -> dict`
+Scores a single control: 0 (Traditional) to 3 (Optimal).
+
+### `assess_pillar(pillar, responses) -> dict`
+Evaluates all controls within a CISA ZT pillar. Returns score, percentage, and maturity level.
+
+### `compute_overall_maturity(pillar_results) -> dict`
+Aggregates pillar scores into overall maturity: Traditional/Initial/Advanced/Optimal.
+
+### `generate_recommendations(pillar_results) -> list`
+Identifies unimplemented controls, prioritizes by pillar weakness.
+
+### `generate_report(data_path) -> dict`
+Full assessment pipeline: load data, assess 5 pillars, compute maturity, generate recommendations.
+
+## CISA ZT Pillars
+
+| Pillar | Controls Assessed |
+|--------|-------------------|
+| Identity | MFA, phishing-resistant MFA, JIT access, PAM |
+| Devices | Inventory, EDR, health attestation, posture |
+| Networks | Microsegmentation, encrypted DNS, SDP |
+| Applications | Inventory, access controls, API security |
+| Data | Classification, DLP, encryption at rest |
+
+## Input Data Format
+
+```json
+{
+  "Identity": {
+    "MFA enforced for all users": {"implemented": true, "maturity": "Advanced"},
+    "Phishing-resistant MFA (FIDO2/PIV)": {"implemented": false, "maturity": "Traditional"}
+  }
+}
+```
+
+## Output Schema
+
+```json
+{
+  "overall_maturity": {"percentage": 52.3, "maturity_level": "Advanced"},
+  "pillars": [{"pillar": "Identity", "percentage": 66.7, "maturity_level": "Advanced"}],
+  "recommendations": [{"pillar": "Devices", "control": "EDR deployed", "priority": "HIGH"}]
+}
+```