James O'Beirne just announced on the Bitcoin-Dev mailing list that he published a Bitcoin Improvement Proposal for OP_VAULT.
Announced something like a month or two ago, OP_VAULT would allow users to create on-chain vaults, where the user has time to react after money is spent from the vault, and repatriate the funds to a very cold storage in case the spend was illegitimate, using a pre-specified "recovery" path.
Think of it as a very specialized kind of covenant, tailor-made to fulfill only one use case: vaults.
OP_VAULT
proposal in Bitcoin Optech Newsletter #234, and had James O’Beirne as a guest on the Audio Recap to chat about his proposal.