import type { BranchDef } from '../command.js';
import type { CommandRegistrySnapshot } from '../command-manifests/registry.js';
import type { ValidatedContribution } from './discovery.js';
/** Adapt legacy ValidatedContribution (plugin format) to transport-neutral
 *  CommandContribution. Returns a snapshot conforming to the unified registry
 *  contract, with an adaptLeaf callback that wraps executeExternalLeaf. */
export declare function adaptPluginContributions(contributions: ValidatedContribution[]): CommandRegistrySnapshot;
/** Map an accepted registry snapshot to real top-level BranchDefs, ready to
 *  concatenate beside core subtrees in `buildRoot()`. Consumes transport-neutral
 *  CommandContribution entries from a unified registry snapshot. */
export declare function composeExternalSubtrees(snapshot: CommandRegistrySnapshot): BranchDef[];