Better Auth Security Best Practices is an agent skill from EpicenterHQ/epicenter. Better Auth security hardening: rate limits, secrets, CSRF, trusted origins, cookies, sessions, OAuth tokens, and audit logging. Use when reviewing auth security, brute-force protection, token handling, or deployment safety.
Its SKILL.md is about 900 tokens, which your agent loads only when the skill is triggered. The skill folder holds 2 other files, including reference files (for example `references/configuration.md`).
It sits in Backend & APIs, covering Security review, Web application vulnerabilities and Rate limiting. It works with Better Auth and GitHub. The repository describes itself as: Open-source, local-first apps.