export declare class HookInput {
    readonly session_id: string;
    readonly cwd: string;
    readonly hook_event_name: string;
    readonly tool_name: string;
    readonly tool_input: {
        readonly file_path: string;
        readonly offset?: number;
        readonly limit?: number;
    };
    readonly tool_result?: string;
    constructor(opts: {
        session_id: string;
        cwd: string;
        hook_event_name: string;
        tool_name: string;
        tool_input: {
            file_path: string;
            offset?: number;
            limit?: number;
        };
        tool_result?: string;
    });
}
export declare class HookOutput {
    readonly exitCode: number;
    readonly stderr: string;
    constructor(exitCode: number, stderr: string);
}
/**
 * Reads stdin with a size guard. Throws if input exceeds MAX_STDIN_BYTES.
 * Accumulates raw buffers to avoid corrupting multi-byte UTF-8 characters
 * that may be split across chunk boundaries.
 */
export declare function readStdin(): Promise<string>;
/**
 * Parses and validates hook input from a raw JSON string.
 * Returns a frozen HookInput instance.
 */
export declare function parseHookInput(raw: string): HookInput;
/**
 * Returns a cwd-relative path, or null if the path is outside the cwd.
 * Prevents path traversal attacks and handles the path.relative() edge case
 * where paths outside cwd produce absolute or '../' prefixed results.
 */
export declare function safeRelativePath(cwd: string, filePath: string): string | null;
/**
 * Wraps a hook's main function with stdin reading, input parsing,
 * and error handling. Logs full stack traces on failure.
 */
export declare function runHook(handler: (input: HookInput) => HookOutput | Promise<HookOutput>, failExitCode: number): void;
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