export type RunLedgerCategory = "major_update" | "regression" | "info";
export interface RunLedgerEntry {
    id: string;
    timestamp_utc: string;
    tool: string;
    category: RunLedgerCategory;
    message: string;
    artifacts: string[];
    metadata: Record<string, unknown>;
}
export interface RunLedgerFile {
    version: 1;
    updated_at: string;
    entries: RunLedgerEntry[];
}
export interface AppendRunLedgerEntryInput {
    tool: string;
    category: RunLedgerCategory;
    message: string;
    artifacts?: string[];
    metadata?: Record<string, unknown>;
}
export declare function readRunLedger(): RunLedgerFile;
export declare function appendRunLedgerEntry(input: AppendRunLedgerEntryInput): {
    entry: RunLedgerEntry;
    path: string;
};
/**
 * Concurrency-safe variant of appendRunLedgerEntry.
 */
export declare function appendRunLedgerEntrySafe(input: AppendRunLedgerEntryInput): Promise<{
    entry: RunLedgerEntry;
    path: string;
}>;
export declare function getRunLedgerPath(): string;
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