/**
 * devbox up — create/boot a box for a branch.
 *
 * Port of cmd_up from devbox.sh. Flow:
 *   1. If a running box exists for the branch: attach (exec in).
 *   2. If a stopped box exists: start it, re-bring display up, attach.
 *   3. Fresh box: create worktree, run devcontainer up, persist GH_TOKEN,
 *      print ready banner, exec into shell.
 */
import type { LauncherContext } from './context.js';
export declare function up(ctx: LauncherContext, branch: string): Promise<number>;
/**
 * Exec into the container's shell. Uses spawn with inherited stdio so the
 * user gets an interactive shell. Signal forwarding is handled by spawnInherit.
 */
export declare function execIntoShell(runner: import('../../lib/shell.js').ShellRunner, cid: string, tty: boolean): Promise<number>;
export declare function requestedEnvironment(ctx: LauncherContext): Promise<Record<string, string>>;
export declare function syncLocalEnvironment(runner: import('../../lib/shell.js').ShellRunner, cid: string, values: Record<string, string>): Promise<void>;