import type { LineRange, NumberedRegion, VerbatimCompactionParameters } from "./compaction-types.js";
export interface MorphRangeDiagnostics {
    droppedRangeCount: number;
    acceptedRangeCount: number;
    failureCategory?: "provider_error" | "policy_refusal";
    failureMessage?: string;
}
export declare function planMorphRanges(region: NumberedRegion, parameters: VerbatimCompactionParameters, options: {
    apiKey: string | undefined;
    signal?: AbortSignal;
    fetchFn?: typeof fetch;
    onDiagnostics?: (diagnostics: MorphRangeDiagnostics) => void;
}): Promise<LineRange[]>;
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