import type { NewSessionSelectionHistory } from "@opengeni/sdk";
import { type ComputeTarget } from "../lib/session-create.js";
import type { SandboxBackend } from "../types.js";
type PersistedProjectProvenance = {
    selectedProjectChannelId?: string | null | undefined;
};
export type NewSessionProjectLaunchIntent = {
    generation: number;
    kind: "initial_omitted";
} | {
    generation: number;
    kind: "explicit";
    channelId: string | null;
} | {
    generation: number;
    kind: "omitted_after_explicit";
};
export declare function initialNewSessionProjectLaunchIntent(launchChannelId: string | null | undefined): NewSessionProjectLaunchIntent;
export declare function nextNewSessionProjectLaunchIntent(current: NewSessionProjectLaunchIntent, previousLaunchChannelId: string | null | undefined, launchChannelId: string | null | undefined): NewSessionProjectLaunchIntent;
export declare function nextFocusedNewSessionProjectLaunchIntent(current: NewSessionProjectLaunchIntent, channelId: string | null | undefined): NewSessionProjectLaunchIntent;
/**
 * Resolve the route's ambient project-selection effect. Undefined means the
 * effect must not mutate an authority already installed by remote hydration;
 * an explicit-to-omitted route transition is a new ordinary launch intent.
 */
export declare function resolveAmbientNewSessionProjectChannelId(input: {
    launchChannelId: string | null | undefined;
    previousLaunchChannelId: string | null | undefined;
    recentChannelId: string | null;
    remoteDraftHydrated: boolean;
}): string | null | undefined;
/** Apply a project change without leaving compute from the prior project behind. */
export declare function newSessionProjectSelection(history: NewSessionSelectionHistory, channelId: string | null, currentSelection: {
    /** Undefined means the current compute came from a draft with unknown project provenance. */
    channelId: string | null | undefined;
    compute: ComputeTarget;
}, defaultSandboxBackend?: SandboxBackend): {
    channelId: string | null;
    compute: ComputeTarget;
};
export declare function resolveHydratedNewSessionProjectSelection(input: {
    launchIntent: NewSessionProjectLaunchIntent;
    remote: PersistedProjectProvenance;
    history: NewSessionSelectionHistory;
    restoredCompute: ComputeTarget;
    defaultSandboxBackend?: SandboxBackend | undefined;
}): {
    channelId: string | null;
    compute: ComputeTarget;
};
export declare function hydratedNewSessionProjectProvenancePresent(launchIntent: NewSessionProjectLaunchIntent, remote: PersistedProjectProvenance): boolean;
export {};