🛠️ Cross-device passkey auth on Android 9, synced with Bitwarden

Summary
Cross-device passkey authentication on Android 9, synced with Bitwarden, built with the help of AI models like DeepSeek and Claude. The repository includes a full specification with test vectors and an accessible explanation.

Why it’s interesting
Built using AI assistance to solve a missing feature on older Android versions for cross-device passkey authentication.

Target user
Android 9 users who want cross-device passkey authentication synced with Bitwarden

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Source: #HackerNews / Show HN