/**
 * Subprocess bridge to the Bun-based vclaw-cli/flow.ts.
 *
 * The Bun runtime is required for Puppeteer + Google Flow access. The
 * main TS CLI shells out to it for `vclaw veo *` subcommands. This
 * helper centralises the spawn + stdio forwarding so each veo verb in
 * vclaw.ts is one line.
 */
export interface VeoSpawnOptions {
    /** When true, build the command but do not actually spawn. For tests + --dry-run. */
    dryRun?: boolean;
    /** Override the Bun binary path. Defaults to `VCLAW_VEO_BUN_BIN` env or `bun`. */
    bunBin?: string;
    /** Override the vclaw-cli flow.ts path. Defaults to `vclaw-cli/flow.ts` (relative to cwd). */
    flowEntry?: string;
    /** Pass env to the child process. Defaults to process.env. */
    env?: NodeJS.ProcessEnv;
}
export interface VeoSpawnResult {
    exitCode: number;
    stdout: string;
    stderr: string;
    /** The full command string (helpful for tests + error messages). */
    command: string;
}
export declare function spawnVeo(args: string[], options?: VeoSpawnOptions): Promise<VeoSpawnResult>;
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