export declare const TURN_MODEL_PROVENANCE_KEY = "github-copilot-turn-model-provenance";
export interface RecordedModel {
    readonly provider: string;
    readonly model: string;
}
export interface TurnModelProvenance {
    readonly routes: readonly RecordedModel[];
    readonly incomplete: boolean;
    readonly ended: boolean;
}
interface State {
    readonly turn: number;
    readonly hasStart: boolean;
    readonly openSteps: readonly number[];
    readonly value: TurnModelProvenance;
}
interface Match {
    readonly event: unknown;
}
interface Context {
    readonly state?: State;
    readonly matches: readonly Match[];
}
interface LocationData {
    readonly kind: 'turn';
    readonly turn: number;
    readonly key: typeof TURN_MODEL_PROVENANCE_KEY;
    readonly value: TurnModelProvenance;
}
export declare function isTurnModelProvenance(value: unknown): value is TurnModelProvenance;
/** Read provenance only; native Core retains attempt accounting and token totals. */
export declare const turnModelProvenanceDefinition: {
    kind: string;
    match(event: unknown): {
        id: string;
        role: "start" | "update";
    } | null;
    start(_context: Context, match: Match): State;
    update(context: Context & {
        readonly state: State;
    }, match: Match): State;
    buildLocationData(context: Context, scope: string, previous: LocationData | null): LocationData | null;
};
export {};
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