Peer is hosted. The engine runs on our servers and calls Anthropic with the key you paste; prompts, rubrics, the Standard and the grading logic never leave the server, and the engine returns grades, never the how. One Claude model, pinned by us (claude-opus-4-7): you never pick a model, and a key from any other provider is refused on paste with one sentence saying why.
Every grade names the skill underneath the moment, the level the Rep showed, and what the next level up looks like. It is a map of where each Rep’s skill is and where it can go, not a script for the next call.