/**
 * Branch databases — per-preview-environment ephemeral database branches.
 *
 *   GET    /projects/:id/preview-envs/branch-dbs                     — list across envs
 *   POST   /projects/:id/preview-envs/:envId/branch-db               — create branch DB
 *   GET    /projects/:id/preview-envs/:envId/branch-db               — get branch DB
 *   DELETE /projects/:id/preview-envs/:envId/branch-db               — drop branch DB
 *
 * Mirrors `apps/api/src/server/platform/routes/branch-databases.ts`.
 * Route paths sourced from `@sylphx/contract` (ADR-084).
 */
import type { BranchDatabase as ContractBranchDatabase, CreateBranchDatabaseInput as ContractCreateBranchDatabaseInput, DestroyBranchDatabaseResult, ListBranchDatabasesResult } from '@sylphx/contract';
import type { Client } from './client.js';
export type BranchDatabase = ContractBranchDatabase;
export type CreateBranchDatabaseInput = ContractCreateBranchDatabaseInput;
export declare const list: (client: Client, projectId: string) => Promise<ListBranchDatabasesResult>;
export declare const create: (client: Client, projectId: string, envId: string, body: CreateBranchDatabaseInput) => Promise<BranchDatabase>;
export declare const get: (client: Client, projectId: string, envId: string) => Promise<BranchDatabase>;
declare const _delete: (client: Client, projectId: string, envId: string) => Promise<DestroyBranchDatabaseResult>;
export { _delete as delete };
/**
 * Merge a branch database back into its parent.
 *
 * The current server route is not contract-backed, so callers should treat
 * this as an experimental management helper until the merge endpoint joins
 * the contract SSOT.
 */
export declare const merge: (client: Client, projectId: string, envId: string, body?: {
    readonly strategy?: "fast-forward" | "squash" | "rebase";
}) => Promise<{
    success: boolean;
    mergedAt: string;
}>;
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