https://cyril.email/ 2025-06-10 monthly 1.0 https://cyril.email/img/cyril-kato,w_384.webp Cyril Kato - Open Source Developer Portrait of Cyril Kato, open source developer specializing in chess programming and Ruby testing tools https://cyril.email/img/cyril-kato,w_200.webp Cyril Kato - Open Source Developer (200w) Portrait of Cyril Kato, open source developer specializing in chess programming and Ruby testing tools