/**
 * Agent Instances Validator (Issue #869).
 *
 * Validates the `agentInstances` payload accepted by
 * `PATCH /api/worktrees/[id]`. Mirrors selected-agents-validator: returns a
 * structured `{ valid, value?, error? }` result instead of throwing, so the API
 * layer can map failures to 400 responses.
 *
 * Rules:
 * - 1..MAX_AGENT_INSTANCES entries (a worktree always keeps at least one).
 * - Each entry: valid instance id, valid CLI tool, alias string within length.
 * - Instance ids must be unique within the payload.
 * - When an instance id equals a CLI tool id (the primary anchor), its
 *   `cliTool` must match that id, keeping `id === cliTool` consistent.
 * - `order` is normalized to the array position so drag-and-drop reordering
 *   only needs to send the array in the desired order.
 */
import { type AgentInstance } from './cli-tools/types';
/** Minimum number of agent instances a worktree must retain (Issue #869). */
export declare const MIN_AGENT_INSTANCES = 1;
/**
 * Validate the `agentInstances` input from an API request body.
 *
 * @param input - Raw value from the request body (unknown for safety)
 * @returns Validation result with a normalized AgentInstance[] or an error
 */
export declare function validateAgentInstancesInput(input: unknown): {
    valid: boolean;
    value?: AgentInstance[];
    error?: string;
};
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