Asciinema CLI 3.0 rewritten in Rust, adds live streaming, upgrades file format
3.0 Published on 15 Sep 2025 by Marcin Kulik I’m happy to announce the release of asciinema CLI 3.0! This is a complete rewrite of asciinema in Rust, upgrading the recording file format, introducing terminal live streaming, and bringing numerous improvements across the board. In this post, I’ll go over the highlights of the release. For a deeper overview of new features and improvements, see the release notes and the detailed changelog. First, let’s get the Rust rewrite topic out of the way.