NLP
Corpus
An open evaluation harness for RAG systems: golden sets, retrieval metrics, LLM-as-judge with calibration, and regression gates in CI.
Why build another one
Because "it seems better" is not a release criterion. Corpus turns every prompt change into a pull request with a diff of measurable outcomes.
Calibrating the judge
An LLM judge is a model, so it needs its own eval. We label 200 examples by hand, measure the judge's agreement with the humans, and only trust it above κ = 0.7.
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