Last week many Bitcoin Core developers met up in Frankfurt, Germany as part of their regular twice-yearly in person meetings.
Attendees volunteered to take notes on the unconference-style sessions and I have a pull request to add the notes to the BTC transcripts website:
- ASMap
- Batch Validation
- Secp256k1 and quantum
- CISA
- Cluster mempool
- CMake
- CoreCheck
- Debugging
- Fuzzamoto
- Libsha
- Multiprocess and Mining Interface
- Fingerprinting
- Net / net_processing split
- Package relay
- Private broadcast
- Security audit
- Subject matter experts and working groups
- Sockets abstraction
Additional informal discussions, code reviews, working groups, or other sessions occurred on:
- BIP 3
- Wallet priorities
- Compact Block prefills
- Silent Payments
- btck
- CI
- SwiftSync
- Benchmarking and IBD
- When do Bitcoin Core users upgrade?
- MuSig2
- Kernel
- Working in-person
- Complications with fuzz testing
- BlockTemplateManager
- QML GUI
- Shared Templates BIP
- Headers-first sync
- Batch Validation
- FIBRE
- Consensus Cleanup
- Silent payments libsecp256k1 light client
- Better communicating with the broad community
- Discussion on block 920138 and Bitcoin Core #33687
- Mempool and relay policy
- CI with CTest and CDash
This meeting was sponsored by BTrust who provided the funding for the venue, food, supplies, etc to facilitate the meeting (thank you!).
JD (from localhost research), Emily (from Brink) and myself organized.
A list of previous meetings is here:
The PR to the 
website is open here, pending approval:
CoreDev Events and Conferences
Invitation only developer events for hacking together on Bitcoin Core and related projects. No politics. Just code.
Bitcoin Transcripts
A collection of technical bitcoin and lightning transcripts
GitHub
add coredev oct 2025 by bitschmidty · Pull Request #593 · bitcointranscripts/bitcointranscripts
