New Holster release focused mainly on concurrency fixes. I've been working on a new app that runs on Holster which is very front end heavy and running all sorts of async requests, and creating lots of tests for it at the same time. The tests started getting pretty complicated, matching the types of interactions involved, and these all run on top of real holster test instances. The tests started getting a bit flaky as they exhausted their memory limit and swapped out cache files.

I realized Holster has never had any specific concurrency tests, so it was interesting adding them and looking at what sort of race conditions were causing problems. I have to say that Claude is getting really good at methodically working through scenarios without getting lost in the details. I'm impressed with the way it found the issues that have been fixed in this release and the relatively simple changes that were made.