I do it from time to time when I’ve run out of tokens at the end of the month. But even then I’ve created a script to pack multiple code files and their dependencies into a single txt, with a tree overview.

And of course you never change the test suite in the process… That would be bad developer practice, LLM or not.

Gemini 3.1 Pro can easily work with this effectively, if not a bit slower than an agent.