import type { SandboxProvider } from "./manager.js";
/**
 * The provider named by the environment: SUBSTRATE_PROVIDER "fly" or "docker"
 * (default). SUBSTRATE_IMAGE names the guest image; SUBSTRATE_REPO binds a
 * repository checkout in and runs the agent from its built package.
 */
export declare function providerFromEnvironment(env?: NodeJS.ProcessEnv): SandboxProvider;
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