customerio-security-basics

Quick Review

Excellent security-focused skill with comprehensive coverage of Customer.io best practices. The description clearly triggers on security, PII, and GDPR concerns. Task knowledge is strong with complete TypeScript examples for credential management (GCP/AWS), PII handling, webhook verification, access control, and data retention. Structure is logical with step-by-step instructions and a useful security checklist. Novelty is good—consolidating multiple security patterns (secrets management, PII hashing, webhook signature verification, GDPR compliance) saves significant token costs and prevents security mistakes that a CLI agent might make when improvising. Minor improvement opportunity: could benefit from a separate reference file for the more extensive code samples to keep SKILL.md more concise, though current organization is still clear and navigable.