presign-guard 参赛：签名前拦截电路永久锁定presign-guard joins TapeOut Accelerate to block lock-before-sign
项目方 x402fizzl 发布 presign-guard，作为 TapeOut Accelerate 黑客松的参赛作品。该工具运行在 X Layer 上，在 AI agent 签名之前拦截风险操作；按说明，在 TapeOut 上单次转账即可把电路及其容器、站点和名称永久锁定，而钱包只会将其显示为普通 NFT 转账，presign-guard 会在签名前捕获这类操作。工具按次调用以 USD₮0 计价收费，推文附有项目链接。Builder x402fizzl released presign-guard as its entry for the TapeOut Accelerate hackathon. The tool runs on X Layer and intercepts risky actions before an AI agent signs: on TapeOut a single transfer can permanently lock a circuit along with its container, site and name, while a wallet only shows it as an ordinary NFT transfer, and presign-guard catches it before signing. Calls are paid per use in USD₮0, and the tweet includes a project link.