Worked on security hardening and API key management for the supabase/cli repository, focusing on implementing asymmetric signing for API authentication using Go. Developed support for asymmetric signed API keys with JSON Web Key (JWK) integration, while providing a symmetric signing fallback to ensure compatibility. Enhanced cryptography workflows by adding helpers for JWK conversion and JWT generation, streamlining key material handling. Refined the JWKS exposure process to publish only public keys, introducing mechanisms to exclude private key material and restricting key operations to verification. This approach improved API security and configuration management, reducing the risk of private key leakage in backend systems.