The first half of this is already happening to a certain extent. I first noticed this in a submission[1] on Dimitris Papailiopoulos' Adderboard[2], which is a code-golf competition for training the smallest transformer that can add two 10-digit numbers. Most submissions on it are fully AI generated.

The report in the linked repo is Claude Code generated.

[1]: https://github.com/rezabyt/digit-addition-491p

[2]: https://github.com/anadim/AdderBoard