Comment by tomashubelbauer

Claude Code is obsessed with using single letter names for inline function parameters and as loop control variables. I don't like it and I think it is sloppy, so I told it to stop in CLAUDE.md. In my experience, Claude Code will respect CLAUDE.md around 70 % of the time, it seems to cherry pick areas that it will respect more and less often and of course it kept ignoring this instruction. So I told it to add a pre-commit hook and invoke the TypeScript compiler and analyze the AST for single-letter variable names and tank the pre-commit check when it detects one with an error message indicating the offending symbols' locations. Now it can be non-deterministic as much as it wants, but it will never commit this particular flair of slop again as the adherence is verified deterministically. I already have a few more rules in mind I want to codify this way to prevent it from reproducing patterns it was trained on that I don't like and consider low quality.