Complete folder anatomy for all 649 cybersecurity skills + update LICENSE to Mahipal

- Add scripts/agent.py and references/api-reference.md to all remaining skills
- Update all 648 LICENSE files: copyright now reads 'Mahipal'
- Add implementing-security-monitoring-with-datadog (new skill with full anatomy)
- All 649 skills now have: SKILL.md, LICENSE, scripts/agent.py, references/api-reference.md

skills/performing-nist-csf-maturity-assessment/references/api-reference.md

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+# API Reference — Performing NIST CSF Maturity Assessment
+
+## Libraries Used
+- **csv**: Parse and generate assessment CSV files
+- **pathlib**: File operations
+
+## CLI Interface
+```
+python agent.py assess --csv assessment_responses.csv
+python agent.py gaps --csv assessment_responses.csv
+python agent.py template [--output template.csv]
+python agent.py executive --csv assessment_responses.csv
+```
+
+## Core Functions
+
+### `assess_from_csv(assessment_file)` — Calculate maturity scores
+Scores each NIST CSF function (Identify, Protect, Detect, Respond, Recover).
+Calculates overall maturity level (1-4 scale) and gap-to-target.
+
+### `generate_gap_analysis(assessment_file)` — Prioritized gap report
+Classifies gaps: HIGH (>=2 gap), MEDIUM (>=1), LOW (<1).
+
+### `create_assessment_template(output_file)` — Generate blank assessment CSV
+Produces CSV with all 23 CSF categories, score/target/evidence columns.
+
+### `generate_executive_summary(assessment_file)` — Board-level report
+
+## NIST CSF Functions & Categories (23 total)
+| Function | Categories |
+|----------|-----------|
+| IDENTIFY | ID.AM, ID.BE, ID.GV, ID.RA, ID.RM, ID.SC |
+| PROTECT | PR.AC, PR.AT, PR.DS, PR.IP, PR.MA, PR.PT |
+| DETECT | DE.AE, DE.CM, DE.DP |
+| RESPOND | RS.RP, RS.CO, RS.AN, RS.MI, RS.IM |
+| RECOVER | RC.RP, RC.IM, RC.CO |
+
+## Maturity Levels
+| Level | Name | Description |
+|-------|------|-------------|
+| 1 | Partial | Not formalized |
+| 2 | Risk Informed | Approved but not org-wide |
+| 3 | Repeatable | Formally expressed as policy |
+| 4 | Adaptive | Continuous improvement |
+
+## Dependencies
+No external packages — Python standard library only.