Bitcoin Optech newsletter #366 is here:

Calvin Kim posted to the Bitcoin-Dev mailing list to announce three draft BIPs co-authored by him along with Tadge Dryja and Davidson Souza about the Utreexo validation model... https://bitcoinops.org/en/newsletters/2025/08/08/#draft-bips-proposed-for-utreexo

Gloria Zhao posted to Delving Bitcoin about lowering the default minimum relay feerate by 90% to 0.1 sat/vbyte... https://bitcoinops.org/en/newsletters/2025/08/08/#continued-discussion-about-lowering-the-minimum-relay-feerate

Anthony Towns posted to Delving Bitcoin to suggest full node peers occasionally send each other their current template for the next block using compact block relay encoding... https://bitcoinops.org/en/newsletters/2025/08/08/#peer-block-template-sharing-to-mitigate-problems-with-divergent-mempool-policies

Add exportwatchonlywallet RPC to export a watchonly version of a wallet is a PR by achow101 that reduces the amount of manual work required to create a watch-only wallet... https://bitcoinops.org/en/newsletters/2025/08/08/#bitcoin-core-pr-review-club

Bitcoin++ Insider has begun publishing reader-funded news about technical Bitcoin topics. Two of their free weekly newsletters, Last Week in Bitcoin and This Week in Bitcoin Core, may be especially interesting to regular readers of the Optech newsletter... https://bitcoinops.org/en/newsletters/2025/08/08/#optech-recommends

In last week’s newsletter, we incorrectly described the updated version of BIP360, pay to quantum-resistant hash, as “making exactly the change” that Tim Ruffing showed was secure in his recent paper... https://bitcoinops.org/en/newsletters/2025/08/08/#correction

Bitcoin Optech will host an audio recap discussion of this newsletter on Riverside.fm Tuesday at 16:30 UTC. Join us to discuss or ask questions! https://riverside.fm/studio/bitcoin-optech