import type { FilesystemProvider } from "../infra/filesystem-provider.js";
declare const RECORD_SCHEMA = "synth-decision-v1";
export type MissionDecisionType = "MISSION_APPROVAL_APPROVED" | "MISSION_APPROVAL_REJECTED" | "MISSION_DRAFT_INTEGRITY_REJECTED";
export type MissionDecision = {
    schema: typeof RECORD_SCHEMA;
    id: string;
    type: MissionDecisionType;
    draftId: string;
    reason?: string;
    confidence?: number;
    snapshotId?: string;
    previousHash: string;
    timestamp: number;
};
export type DecisionInput = {
    type: MissionDecisionType;
    draftId: string;
    reason?: string;
    confidence?: number;
    snapshotId?: string;
};
export type DecisionLogRead = {
    records: MissionDecision[];
    chainValid: boolean;
};
/**
 * Verify chain continuity: exactly one genesis record, one successor
 * per record, and every record reachable from genesis.
 */
export declare function verifyDecisionChain(records: MissionDecision[]): boolean;
/**
 * Append a decision to the record. Fails closed: a broken chain is
 * never extended silently.
 */
export declare function appendDecision(dataDir: string, input: DecisionInput, fsProvider?: FilesystemProvider): Promise<MissionDecision>;
/** Read the record, optionally filtered to one draft. */
export declare function listDecisions(dataDir: string, draftId?: string, fsProvider?: FilesystemProvider): Promise<DecisionLogRead>;
/** Latest decision of a type for a draft, or undefined. */
export declare function latestDecision(dataDir: string, draftId: string, type: MissionDecisionType, fsProvider?: FilesystemProvider): Promise<MissionDecision | undefined>;
export {};