Building your own AI agent harness gives you more control, a user argues

A user argues that even a minimal custom AI agent harness can deliver better code and writing, with tailored system prompts making overly verbose answers easier to fix. They acknowledge that optimization is difficult, but predict self-improving algorithms will make it easier. They also say local models allow the model and harness to be tuned together, and point readers to Eve, Exo and Prime Agent as open-source projects to explore.