Here are the very draft interpreter and BIPs for Script Restoration. I'm seeking comments (looking at nostr:nprofile1qqsdnpcgf3yrjz3fpawj5drq8tny74gn0kd54l7wmrqw4cpsav3z5fgpz4mhxue69uhk2er9dchxummnw3ezumrpdejqz9rhwden5te0wfjkccte9ejxzmt4wvhxjmcprpmhxue69uhhyetvv9ujuumwdae8gtnnda3kjctvl3x2lg and nostr:nprofile1qqs2nep2pjnwfvfqszytdzj06eq8fqd3yps0j9dqlm95ezr524lrwjgpr4mhxue69uhkummnw3ez6ur4vgh8wetvd3hhyer9wghxuet5qyt8wumn8ghj7un9d3shjtnwdaehgu3wvfskueqpz3mhxue69uhhyetvv9ujuerpd46hxtnfdunyshzy here!) on all aspects, including format and what opcodes make sense to combine into a single proposal.

There are definitely some tweaks we could make to costing (it bugs me that the formula for OP_MUL is not symmetric, for example!), but that part is pretty solid.

Once we have a single proposal that we think is well-specified, reasonable and useful, it'll be time to get coauthors (I have a day job, and it's not this!) and formally propose it for broader scrutiny.

https://github.com/rustyrussell/bips/pull/1/

And interpreter (not other parts, so not actually usable except bench and test!):

https://github.com/rustyrussell/bitcoin/pull/1