Bitcoin Core developer Cory Fields outlined three conceptual mechanisms—Quantum Landmines, Staked Auction and Sats Auction—in a November 4 post to the Bitcoin Development mailing list. The designs assume a quantum-safe output type is available before a future point Fields calls qday and that new consensus rules activate afterward. They would require post-qday spends of vulnerable legacy outputs to be fully collateralized, making attackers risk their own bitcoin and potentially lose it to owners or third-party bidders. The mechanisms do not make Bitcoin quantum-resistant. Quantum Landmines use pre-qday commitments and time windows to let owners reclaim collateral, while Staked Auction and Sats Auction introduce competing bids when private keys may be lost. Fields described the work as rough thought experiments, with no BIP, code, activation mechanism or schedule, and left the soft-fork design for future work.