import type { AgentInit, FabricRuntime, SessionStore } from './types.js';
export interface RuntimeModeResolution {
    runtime: FabricRuntime;
    warnings: string[];
    /**
     * True when the agent should not persist any session state, artifacts,
     * approvals, or events to disk / external store.
     */
    ephemeral: boolean;
}
/**
 * Resolve the effective runtime mode for an `init()` call, applying
 * production safety rules:
 *
 * - In production (`FABRIC_ENV=production` or `NODE_ENV=production`),
 *   choosing `stateless` is allowed but logged as an explicit choice.
 * - `inline` (the default) without an explicit `SessionStore` falls
 *   back to in-memory storage. In production this emits a warning unless
 *   `FABRIC_ALLOW_EPHEMERAL_STATE=1` is set or runtime is explicitly
 *   `'stateless'`.
 * - Unknown runtime values fall through to `'inline'` with a warning.
 */
export declare function resolveRuntimeMode(options: Pick<AgentInit, 'runtime' | 'store' | 'persistence'>, env?: Record<string, string | undefined>): RuntimeModeResolution;
export declare function isStatelessRuntime(runtime: FabricRuntime | undefined): boolean;
/**
 * Returns true when `store` is the in-memory default (no `appendEntry`
 * persistence beyond memory). Used by stateless mode to skip writes.
 */
export declare function isInMemoryStore(store: SessionStore | undefined): boolean;
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