Comment by Zanfa

LLMs would also need to use historic commits as context, rather than just the current state of the codebase in isolation. Most codebases I've worked with go through migrations from a legacy pattern A to a newer and better pattern B, used across different parts of the codebase. Rarely can these migrations be done in a single go, so both patterns tend to stick around for a while as old code is revisited. Like the HTTP example, even if LLMs pick up a pattern to follow (which they often don't), it's a coin flip whether they pick the right one or not.