Jameson Lopp says Bitcoin Core saw 135 contributors and 285,000 code changes in 2025
In 2025, Bitcoin Core activity increased, according to Jameson Lopp, with 135 contributors, 285,000 lines of code changed versus 276,000 in 2024, and 2,541 commits, up 1%. Mailing list traffic rose 60% year over year. The year also featured an October expansion of the OP_RETURN data limit and a November third‑party audit by Quarkslab that reported no high or medium‑severity issues.