CodeTracer – A time-traveling debugger implemented in Nim and Rust
Hey! We are presenting CodeTracer - a user-friendly time-traveling debugger designed to support a wide range of programming languages: https://github.com/metacraft-labs/codetracer?tab=readme-ov-f... CodeTracer records the execution of a program into a sharable self-contained trace file. You can load the produced trace files in a GUI environment that allows you to move forward and backward through the execution and to examine the history of all memory locations. They say a picture is worth a thousand words — well, a video is even better! Watch the demo below to see…
In plain words
CodeTracer is a time-traveling debugger that records program execution into shareable trace files for multiple programming languages. Users can load trace files in a GUI to navigate forward and backward through execution history and examine memory locations at any point. Currently supporting Noir with community-driven projects underway for Ruby and Python, CodeTracer is built in Nim and Rust with an open trace format designed for extensibility.
written from the facts on this page · September 2026
From the sources
In the maker’s words, at launch
Hey! We are presenting CodeTracer - a user-friendly time-traveling debugger designed to support a wide range of programming languages: https://github.com/metacraft-labs/codetracer?tab=readme-ov-f... CodeTracer records the execution of a program into a sharable self-contained trace file. You can load the produced trace files in a GUI environment that allows you to move forward and backward through the execution and to examine the history of all memory locations. They say a picture is worth a thousand words — well, a video is even better! Watch the demo below to see CodeTracer in action: https://www.youtube.com/watch?v=xZsJ55JVqmU The initial release is limited to the Noir programming language, but CodeTracer uses an open format for its trace files and we've started community-driven projects which aim to add support for Ruby and Python. We are also developing an alternative back-end, capable of working with RR recordings, which will make CodeTracer suitable for debugging large-scale programs in a variety of system programming languages such as C/C++, Rust, Nim, D, Zig, Go, Fortran and FreePascal.
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