First quantum-safe Bitcoin transaction mined on mainnet

What happened

A Bitcoin transaction protected by a quantum-resistant, hash-based lock was mined on mainnet in block 964,199 (txid 305a24ff...abab07). The Quantum-Safe Bitcoin scheme, designed by StarkWare's Avihu Levy with the implementation finished by engineer Tomer Giladi, uses signature grinding, so security rests on hash preimage resistance rather than key secrecy, and needs no soft fork. The transaction format is non-standard, so MARA's Slipstream service mined it, and the scheme protects only coins moved into its special output; StarkWare still argues a soft fork is the better long-term answer.