/**
 * Shared environment contract for runtime Intercom group inheritance.
 *
 * Intercom and subagents are separate built-in packages, so the host owns the
 * key and reader rather than either extension. This keeps both packages on one
 * contract while allowing subagents to run when Intercom is not installed.
 */
export declare const RUNTIME_INTERCOM_GROUP_ENV = "ATOMIC_INTERCOM_RUNTIME_GROUP";
/** Use one environment entry per session so in-process sessions cannot overwrite each other. */
export declare function runtimeIntercomGroupEnvKey(sessionId: string): string;
/** Read one session's non-empty runtime group from the inherited environment. */
export declare function readRuntimeIntercomGroup(sessionId: string | undefined): string | undefined;
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