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-aws-macie-for-data-classification/references/api-reference.md

@@ -0,0 +1,61 @@
+# API Reference: AWS Macie Data Classification Agent
+
+## Dependencies
+
+| Library | Version | Purpose |
+|---------|---------|---------|
+| boto3 | >=1.28 | AWS SDK for Macie2 sensitive data discovery |
+
+## CLI Usage
+
+```bash
+python scripts/agent.py \
+  --profile security-audit \
+  --region us-east-1 \
+  --output-dir /reports/ \
+  --output macie_report.json
+```
+
+## Functions
+
+### `get_macie_client(profile, region)`
+Creates boto3 Macie2 client with optional named profile.
+
+### `enable_macie(client) -> dict`
+Calls `client.get_macie_session()` to check status, then `client.enable_macie()` if needed.
+
+### `list_s3_buckets_summary(client) -> list`
+Calls `client.describe_buckets()` to get bucket inventory with encryption, public access, and classifiable object counts.
+
+### `create_classification_job(client, bucket_names, job_name) -> dict`
+Calls `client.create_classification_job(jobType="ONE_TIME", s3JobDefinition={...})` for targeted sensitive data discovery.
+
+### `get_finding_statistics(client) -> dict`
+Calls `client.get_finding_statistics(groupBy=...)` for severity and type breakdowns.
+
+### `list_findings(client, severity, max_results) -> list`
+Calls `client.list_findings()` with severity criterion, then `client.get_findings(findingIds=[...])` for details.
+
+### `generate_report(client) -> dict`
+Orchestrates all functions and compiles summary with public bucket identification.
+
+## boto3 Macie2 Methods Used
+
+| Method | Purpose |
+|--------|---------|
+| `enable_macie(status)` | Enable Macie service |
+| `describe_buckets(criteria)` | S3 bucket inventory |
+| `create_classification_job(...)` | Start discovery job |
+| `get_finding_statistics(groupBy)` | Finding aggregations |
+| `list_findings(findingCriteria)` | Filter findings |
+| `get_findings(findingIds)` | Detailed finding data |
+
+## Output Schema
+
+```json
+{
+  "summary": {"total_buckets": 45, "public_buckets": 2, "high_findings": 12},
+  "bucket_inventory": [{"name": "my-bucket", "public_access": "NOT_PUBLIC"}],
+  "high_findings": [{"type": "SensitiveData:S3Object/Personal", "bucket": "data-lake"}]
+}
+```