/**
 * Shell-quote an argument for safe interpolation into a shell command string.
 * Safe characters (alphanumeric, `.`, `_`, `-`, `/`, `=`, `:`, `@`) pass through.
 * Everything else is wrapped in single quotes with embedded quotes escaped.
 */
export declare function shellQuote(arg: string): string;
/**
 * Result of splitting a shell command string.
 */
export interface ShellSplitResult {
    /** Command parts between operators */
    parts: string[];
    /** Operators that were found (&&, ||, ;) */
    operators: string[];
}
/**
 * Split a shell command string on operators (&&, ||, ;) while respecting quotes.
 *
 * This is a quote-aware splitter that won't split inside single or double quoted strings.
 * Handles escaped quotes within quoted strings.
 *
 * @example
 * ```typescript
 * splitShellCommand('echo "hello && world" && ls')
 * // => { parts: ['echo "hello && world"', 'ls'], operators: ['&&'] }
 *
 * splitShellCommand("bash -c 'cd /tmp && pwd' || echo fail")
 * // => { parts: ["bash -c 'cd /tmp && pwd'", 'echo fail'], operators: ['||'] }
 * ```
 */
export declare function splitShellCommand(command: string): ShellSplitResult;
/**
 * Reassemble command parts with their operators.
 *
 * @example
 * ```typescript
 * reassembleShellCommand(['echo hello', 'ls'], ['&&'])
 * // => 'echo hello && ls'
 * ```
 */
export declare function reassembleShellCommand(parts: string[], operators: string[]): string;
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