import type { HarnessDefinition } from './HarnessDefinition';
/**
 * Finds out which file is really executed when the harness command runs.
 *
 * The lookup deliberately uses the very same `PATH` which runs the harness, so it reports the copy of the
 * harness which Promptbook itself would use. Symbolic links are followed, because installers like the
 * standalone OpenAI Codex installer only link their package into a directory on `PATH`.
 *
 * Note: `$` is used to indicate that this function is not a pure function - it runs a command in a shell
 *
 * @returns Resolved path of the harness command or `null` when the command is not available
 * @private internal utility of `promptbookCli`
 */
export declare function $resolveHarnessCommandPath(definition: HarnessDefinition): Promise<string | null>;