Ratchet — engineering notes https://ratchetgate.com/blog Notes from building an effect gate for AI agents. en Your idempotency keys are broken on macOS https://ratchetgate.com/blog/idempotency-keys-are-broken-on-macos https://ratchetgate.com/blog/idempotency-keys-are-broken-on-macos Sun, 31 Aug 2026 00:00:00 GMT Two machines, the same idempotency key, both authorised to charge the same card. The cause is four lines of Unicode.