LLM Eval Framework: Grade Prompts, Models and Harnesses

Most teams shipping LLM features have no idea whether last week's prompt edit made things better or worse. They have a hunch. They tried five inputs in a playground, the outputs looked fine, and it went to production. That is not testing — that's a code review where the reviewer only read the first page. An LLM eval framework is tooling that runs a fixed set of tasks against one or more model configurations and grades the outputs against an explicit rubric, producing comparable scores instead…