yup. I started a fully autonomous, 100% vibe coded side project called steadytext, mostly expecting it to hit a wall, with LLMs eventually struggling to maintain or fix any non-trivial bug in it. turns out I was wrong, not only has claude opus been able to write up a pretty complex 7k LoC project with a python library, a CLI, _and_ a postgres extension. It actively maintains it and is able to fix filed issues and feature requests entirely on its own. It is completely vibe coded, I have never even looked at 90% of the code in that repo. it has full test coverage, passes CI, and we use it in production!

granted- it needs careful planning for CLAUDE.md and all issues and feature requests need a lot of in-depth specifics but it all works. so I am not 100% convinced by this piece. I'd say it's def not easy to get coding agents to be able to manage and write software effectively and specially hard to do so in existing projects but my experience has been across that entire spectrum. I have been sorely disappointed in coding agents and even abandoned a bunch or projects and dozens of pull requests but I have also seen them work.

you can check out that project here: https://github.com/julep-ai/steadytext/