Additionally, we run in a loop until it stops finding things, and as part of that, do test amplification when it does find any. We regularly see 3-8 rounds yielding valid results.
IMO half the value is customization to your repo, so copying these and specializing to your repo is super quick and pays off almost immediately . How to find style guides, how to run tests, what dimensions of correctness to look for, etc.
We do a similar look here: https://github.com/graphistry/pygraphistry/blob/master/agent...
This kind of thing makes me question how important Mythos is for security bug finding - doing a High effort loop with a frontier model in code reviews until convergence has already outperformed human review for us . (Doesn't replace, but does find things we miss, and catches many we do see earlier).