import type { ModelFitnessReport } from "../research/model-fitness.ts";
/**
 * Fitness applicability doctrine: Class A autonomous adoption requires proof; Class B routed turns
 * are subtractive-only and pass unprobed models. Compaction is always-on subtractive composition:
 * digest-failed probed cheap summarizers fall back, while unprobed models pass. Class C explicit
 * user choices are deliberately not selection-gated here. The `search` lane is probed and reported
 * but has no selection-time consumer yet.
 */
export type FitnessGatedSurface = "compaction" | "router_cheap" | "router_medium" | "router_expensive" | "router_judge" | "executor" | "curation" | "scout_auto";
export type FitnessGateVerdict = {
    fit: true;
    probed: boolean;
} | {
    fit: false;
    reason: "unprobed";
} | {
    fit: false;
    reason: "lane_failed";
    lane: string;
    succeeded: number;
    total: number;
};
export declare function laneMeetsFitnessBar(succeeded: number, total: number): boolean;
export declare function evaluateSurfaceFitness(surface: FitnessGatedSurface, report: ModelFitnessReport | undefined): FitnessGateVerdict;
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