This is good advice, and just as important is for authors to release the code they used.

For my Master's thesis in AI (12 years ago, so before most of this open stuff) I compared an existing Genetic Algorithm, described in a published paper, against my improvement. My improvement was significantly better.

However, I relied on the prose description of the original algorithm. The original paper (cited many, many times) didn't even have pseudocode, let alone source code.

For my paper, I included pseudocode of both the original algorithm and my improved algorithm. But we still didn't have established practices for how to make source code available to readers, in such a way that they'd be archived long term.

Is there an established way now?