An AI answer isn't useful just because it sounds right.
The Developer Knowledge MCP server didn't ship because a demo looked convincing. We tested it with a blind evaluation: a technical writer scored answers without knowing which version produced them. The score improved from 7.6 to 8.5, surpassing the launch bar we'd set at 8. Good demos show what's possible. Rigorous evaluation tells you what's ready to ship.
The eval story