[!IMPORTANT] UPDATED 10/1/25: GitHub Spec Kit integration complete! Project now follows specification-driven development with constitutional framework, architectural decision records, and ...

Bitcoin Core saw a significant uptick in development activity during 2025, with mailing list traffic up 60% year-over-year, 135 unique code contributors, and approximately 285,000 lines of code ...

Key metrics tracking the development of Bitcoin Core show 2025 was a good year for the blockchain, with more developers contributing more code, says Jameson Lopp. Bitcoin developers working on the ...