LQS v3.1 — an open methodology for rating AI training data (multi-oracle consensus + signed certificates) [P]

Solo author here. I spent the last six months building (and then sunsetting) a marketplace for data. The marketplace failed for an interesting reason: the actual bottleneck isn't supply. There's tons of data. The bottleneck is that buyers can't independently evaluate quality, and there's no Cleanlab/Galileo-style tool that occupies the rating-authority position - those products are diagnostics owned by the data owner, not third-party attestations a procurement team or model risk officer can cite. So I rebuilt the whole thing as the rating layer.