import type { InstalledPlugin } from '../../types.js';
import type { Field } from '../help.js';
export interface ExternalLeafSpec {
    plugin: InstalledPlugin;
    /** Absolute, resolved executable path. */
    executable: string;
    /** Full canonical command path, e.g. ['app', 'show']. */
    commandPath: string[];
    /** Declared leaf output fields — validated against the result before render. */
    output: Field[];
}
/** Validates a result object against declared output field descriptors.
 *  Returns null if valid; otherwise returns a { field, receivedType } error.
 *  Transport-neutral: used by both command-plugin and configured-CLI adapters. */
export declare function validateDeclaredResult(output: Field[], result: Record<string, unknown>): {
    field: string;
    receivedType?: string;
} | null;
/** Execute one external leaf and return its result object (crtr renders it via
 *  the generic renderer; `--json` mirrors it). Throws a CrtrError for any
 *  protocol violation or the plugin's own recoverable error. */
export declare function executeExternalLeaf(spec: ExternalLeafSpec, input: Record<string, unknown>): Record<string, unknown>;