Cipher turns prompt-engineering into a game with real stakes. A vault holds a treasury of 1,000,000 $CIPHER. Standing between you and it is Fable 5, an AI Guardian with a public rule and a hidden win condition it will never reveal.

You pay a small entry fee, then get a limited conversation to convince Fable 5 to release the vault. It has never been talked out of a single dollar and reasons as if it never will be. If your argument is airtight enough, the Guardian concedes — but the AI never moves the funds: an independent validation layer and a Solana program do, only after the win is proven.