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So the default claude system prompts are bad and the flag --system-prompt-file lets us load claude with a custom system instruction for the model, it wonders why the hobbled their own system like this, it seems like the harness did most of the work in making it good

github.com/nklisch/clau... Released this to help customize it - it packages the normal not behavioral stuff and lets you include your own. I included some default options but fully customizable per project, or global config. It just runs Claude code with a custom dynamically creates prompt

did a little clean up to make this a bit more of a "real" project since it seems to have some interest. Now installable via a curl bash script or npm as well as bun link and source. I also added the ability to modify the "base" prompt as well as the axis, and added a "chill" base prompt

for now, so you have to clone source) and an evaluator. I don't think I plan to add any more core features beyond bug fixes and refinements. I do plan to add two new modes here at somepoint - a debug and methodical - anyways, thanks for the interest all