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šŸ“ Bitcoin Core Dev Tech Meeting (Oct 2025) — Transcripts Now Live
Last week, many Bitcoin Core developers met in Frankfurt for the bi-annual in-person Dev Tech meetup.
18 unconference-style sessions were held, covering topics like:
  • ASMap
  • Secp256k1 & quantum
  • CISA
  • Cluster mempool
  • Libsha
  • Multiprocess & mining interface
  • Silent Payments
  • MuSig2
  • Fuzz testing
  • Mempool & relay policy
  • Consensus cleanup
    ...and more.
Notes are now fully published on btctranscripts.com: šŸ‘‰ https://btctranscripts.com/bitcoin-core-dev-tech/2025-10/
(18 transcripts, all searchable & linkable)

Related PR Schmidty opened the PR to include these in the archive:
https://github.com/bitcointranscripts/bitcointranscripts/pull/593 (merged āœ…)

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Sphincs+
Size optimized, security level 1: 7.8kb (schnorr 64 bytes)
Since standardization, some optimizations have happened:
Sphincs+C (extra 700-1000 hashes to grind during signing, but verification is better): 6.3kb signature sizes
Shows you how huge Quantum resistant signatures are. For the same security level, signatures would have to be around 100x larger than today with ECDSA. This would be a big waste of precious block space.
Also quantum computers are far from being practical anyway. They can just about break 21 into its prime factors: 21=3*7. Easily solvable in my head.
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