import type { RuntimePromotionConflictPolicy, RuntimePromotionRoute, RuntimePromotionSourceClassification } from './runtime-promotion-journal-schema.js';
export type RuntimePromotionPreliminaryEquality = 'not-required' | 'verified-equal' | 'verified-different' | 'unverified';
export type RuntimePromotionPreflightConflictReason = 'cache-candidates-ambiguous' | 'cache-marker-invalid' | 'cache-path-unsafe' | 'project-path-unsafe' | 'keep-project-requires-destination' | 'weak-source-requires-use-cache' | 'weak-source-not-deduplicable' | 'runtime-diverged' | 'runtime-equivalence-unverified';
export interface RuntimePromotionAuthorityPolicyInput {
    readonly sourceClassification: RuntimePromotionSourceClassification;
    readonly destinationRuntimePreexisting: boolean;
    readonly requestedConflict?: RuntimePromotionConflictPolicy;
    readonly preliminaryEquality?: RuntimePromotionPreliminaryEquality;
}
export type RuntimePromotionAuthorityPolicySelection = {
    readonly status: 'selected';
    readonly route: RuntimePromotionRoute;
    readonly effectiveConflict: RuntimePromotionConflictPolicy;
} | {
    readonly status: 'conflict';
    readonly reason: RuntimePromotionPreflightConflictReason;
    readonly effectiveConflict: RuntimePromotionConflictPolicy;
    readonly sourcePreserved: boolean;
    readonly allowedPolicies: readonly RuntimePromotionConflictPolicy[];
};
/**
 * Select fresh runtime authority without touching the filesystem.
 *
 * Policies are normalized to `abort` only when no cache source exists and the
 * supplied choice is therefore irrelevant. An explicit `keep-project` is
 * never reinterpreted when a source exists: without a destination it is a
 * conflict that preserves the source.
 */
export declare function selectRuntimePromotionAuthority(input: RuntimePromotionAuthorityPolicyInput): RuntimePromotionAuthorityPolicySelection;
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