/**
 * @license
 * Copyright 2026 Steven Roussey <sroussey@gmail.com>
 * SPDX-License-Identifier: Apache-2.0
 */
import type { IA2AAgentDescriptor } from "@workglow/a2a/util";
import type { TaskGraphJson } from "@workglow/task-graph";
import type { Command } from "commander";
/** Nothing standard sits here, and it is one along from the MCP server. */
export declare const DEFAULT_A2A_PORT = 8789;
/**
 * Loopback by default, and deliberately not a wildcard by accident.
 *
 * Every message this server accepts runs an agent that can spend model quota
 * and call whatever tools its saved graph holds, so binding it where the
 * network can reach it must be something an operator says out loud.
 */
export declare const DEFAULT_A2A_HOST = "127.0.0.1";
/**
 * The environment variable a pinned token can arrive in.
 *
 * Preferred over `--token`: a peer's config has to hold the same token across
 * restarts, and an argument that never changes is one every other process on
 * the machine can read out of `ps`.
 */
export declare const A2A_TOKEN_ENV = "WORKGLOW_A2A_TOKEN";
/**
 * A saved graph, as one servable agent — or the reason it is not one.
 *
 * Only a single `AgentTask` maps: A2A publishes one agent per card, and an
 * agent is a conversation a peer continues. A larger graph has no single
 * conversation, and the rest of the agents folder holds graphs that cannot
 * answer a message at all. A node saved without a model is refused here too,
 * at startup, rather than discovered by the first peer to write.
 */
export declare function descriptorFromGraph(id: string, graph: TaskGraphJson): IA2AAgentDescriptor;
/** Adds `serve` to the `a2a` group: one saved agent, published to A2A peers. */
export declare function registerA2AServeCommand(a2a: Command): void;