import type { ActivityCallOptions, WorkflowSessionState, WorkflowSessionStateOptions } from '../types.ts';
import type { Context } from './index.ts';
import type { ContextInternals } from './internals.ts';
/** Detect whether a value is an {@link ActivityCallOptions} object. */
export declare function isActivityCallOptions(value: unknown): value is ActivityCallOptions;
export declare function createCheckpointLocals(stateSessionStore: Record<string, unknown> | undefined, existingLocals: Record<string, unknown> | undefined): Record<string, unknown>;
export declare function commitSessionStateStore(internals: ContextInternals, stateSessionStore: Record<string, unknown> | undefined): void;
export declare function getSessionStateValue<T>(internals: ContextInternals, key: string, initialValue?: T): T | undefined;
export declare function setSessionStateValue<T>(internals: ContextInternals, key: string, value: T): T;
export declare function updateSessionStateValue<T>(internals: ContextInternals, key: string, initialValue: T | undefined, updater: (current: T | undefined) => T): T;
export declare function clearSessionStateValue(internals: ContextInternals, key: string): void;
export type SessionStateRunArguments = {
    readonly hasInput: false;
    readonly options: ActivityCallOptions;
} | {
    readonly hasInput: true;
    readonly input: unknown;
    readonly options: ActivityCallOptions;
};
export declare function mergeSessionStateRunOptions(rest: readonly unknown[]): SessionStateRunArguments;
export declare function executeSessionStateOperation<TResult>(internals: ContextInternals, apply: () => TResult): TResult;
export declare function stateSession<T>(context: Context, internals: ContextInternals, key: string, options?: WorkflowSessionStateOptions<T>): WorkflowSessionState<T>;