/**
 * [WHO]: Pure candidate transition reducer and validation evidence gates
 * [FROM]: Depends only on extension-local evolution types
 * [TO]: Consumed by manual and automatic refinement orchestration
 * [HERE]: extensions/optional/evolution/workflow.ts - promotion policy authority
 */
import type { CandidateRecord, EvolutionArtifact, EvolutionScope, GateEvidence } from "./types.js";
export type CandidateEvent = {
    type: "static_checked";
    evidence: GateEvidence;
} | {
    type: "replay_checked";
    evidence: GateEvidence;
} | {
    type: "eval_checked";
    evidence: GateEvidence;
} | {
    type: "request_approval";
    reason?: string;
} | {
    type: "approve";
    actor: string;
    overrideMissingEffectiveness?: boolean;
} | {
    type: "promote";
} | {
    type: "supersede";
    reason: string;
} | {
    type: "rollback";
    reason: string;
} | {
    type: "fail";
    gate: string;
    reason: string;
};
export declare function advanceCandidate(record: CandidateRecord, event: CandidateEvent): CandidateRecord;
export declare function mergeScopedArtifacts(scoped: ReadonlyArray<{
    scope: EvolutionScope;
    artifacts: readonly EvolutionArtifact[];
}>, keyFor?: (artifact: EvolutionArtifact) => string): EvolutionArtifact[];