import type { Subprocess } from "bun";
export interface ShellConfig {
    shell: string;
    args: string[];
    env: Record<string, string>;
    prefix: string | undefined;
}
/**
 * Check if a shell binary is executable.
 */
export declare function isExecutable(path: string): boolean;
/**
 * Resolve a basic shell (bash or sh) as fallback.
 */
export declare function resolveBasicShell(): string | undefined;
/**
 * Get shell configuration based on platform.
 * Resolution order:
 * 1. User-specified shellPath in settings.json
 * 2. On Windows: Git Bash in known locations, then bash on PATH
 * 3. On Unix: $SHELL if bash/zsh, then fallback paths
 * 4. Fallback: sh
 */
export declare function getShellConfig(customShellPath?: string): ShellConfig;
/**
 * Check if a process is running.
 */
export declare function isPidRunning(pid: number | Subprocess): boolean;
export declare function onProcessExit(proc: Subprocess | number, abortSignal?: AbortSignal): Promise<boolean>;