/**
 * WHAT-IF TWIN — let anyone poke the result without paying for an experiment. Once Melete has watched your
 * process a few times, it has effectively learned a cheap stand-in for it — a digital twin. So a
 * non-technical user can simply ask "what if I set the temperature to 90 and the dose to 19?" and get an
 * instant predicted score — together with the one thing every other predictor hides: HOW MUCH TO TRUST IT.
 *
 * Near settings you've actually measured, the twin is confident and accurate. Far from your data it says so
 * out loud — "this is a guess" — instead of pretending. That honesty is the whole point: a prediction you
 * can't trust is worse than no prediction, so the twin grades its own confidence by how close your question
 * is to real evidence.
 *
 * Honest by construction (DIAKRISIS): the prediction is inverse-distance interpolation of your real
 * measurements (it can't conjure structure that isn't in the data), and confidence is graded purely by
 * distance to the nearest evidence relative to your data's own spacing. The gauntlet proves it with
 * leave-one-out cross-validation (accurate where data is dense) AND that it flags far-away queries as
 * guesses (honest where data is absent). It abstains entirely when there's too little data to stand in for
 * anything.
 */
import { type Space, type Experiment } from "./space.js";
import { type Observation } from "./engine.js";
export interface WhatIfReport {
    predicted: number;
    confidence: "measured" | "confident" | "rough" | "guess" | "unknown";
    uncertainty: number;
    nearestKnown: {
        distance: number;
        value: number;
    } | null;
    note: string;
}
/** Predict the score at a proposed setting from the measurements so far, with an honest confidence grade. */
export declare function predictAt(obs: ReadonlyArray<Observation>, space: Space, query: Experiment): WhatIfReport;
export declare function twinGauntlet(): {
    score: 0 | 100;
    checks: Array<{
        name: string;
        pass: boolean;
        detail: string;
    }>;
};
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