/**
 * Shared impact-analysis trust contract.
 *
 * The contract is intentionally pure and tool-neutral: graph computes impact,
 * fitness consumes it for conservative changed-targeting, and suite/review
 * surfaces can project the same verdict without learning graph internals.
 */
export type ImpactTrustCoverage = 'full' | 'partial' | 'unknown';
export type ImpactTrustFallback = 'targeted' | 'full-run';
export type ImpactTrustSource = 'git' | 'files' | 'catalog' | 'impact' | 'suite';
export type ImpactUncertaintyCode = 'git-shallow' | 'git-merge-base-unavailable' | 'changed-file-deleted' | 'changed-file-renamed' | 'changed-file-unmatched' | 'graph-catalog-unavailable' | 'graph-catalog-incomplete' | 'graph-catalog-approximate' | 'impact-uncertainty-truncated' | 'impact-truncated' | 'impact-malformed-row-omitted' | 'suite-step-unverified';
export interface ImpactUncertainty {
    readonly code: ImpactUncertaintyCode;
    readonly source: ImpactTrustSource;
    readonly message: string;
    readonly filePath?: string;
}
export interface ImpactTrust {
    readonly coverage: ImpactTrustCoverage;
    readonly fallback: ImpactTrustFallback;
    readonly fullyVerified: boolean;
    readonly uncertainties: readonly ImpactUncertainty[];
}
export interface BuildImpactTrustInput {
    readonly uncertainties?: readonly ImpactUncertainty[];
    readonly fallback?: ImpactTrustFallback;
}
export interface ImpactTrustChangedEntryInput {
    readonly path: string;
    readonly status?: string;
    readonly previousPath?: string;
}
export interface ImpactTrustGitWarningInput {
    readonly code: string;
    readonly message: string;
}
export declare const MAX_IMPACT_UNCERTAINTIES = 50;
export declare function buildImpactTrust(input?: BuildImpactTrustInput): ImpactTrust;
export declare function mergeImpactUncertainties(...groups: readonly (readonly ImpactUncertainty[] | undefined)[]): readonly ImpactUncertainty[];
export declare function gitWarningsToImpactUncertainties(warnings: readonly ImpactTrustGitWarningInput[] | undefined): readonly ImpactUncertainty[];
export declare function changedEntriesToImpactUncertainties(entries: readonly ImpactTrustChangedEntryInput[]): readonly ImpactUncertainty[];
export declare const FULL_IMPACT_TRUST: ImpactTrust;
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