import type { ImageContent, TextContent } from "@earendil-works/pi-ai";
interface V3EntryBase {
    id: string;
    parentId: string | null;
    timestamp: string;
}
export type V3Entry = V3EntryBase & ({
    type: "message";
    message: {
        role: unknown;
    };
} | {
    type: "thinking_level_change";
    thinkingLevel: string;
} | {
    type: "model_change";
    provider: string;
    modelId: string;
} | {
    type: "compaction";
    summary: string;
    firstKeptEntryId?: string;
    tokensBefore: number;
} | {
    type: "branch_summary";
    fromId: string;
    summary: string;
} | {
    type: "custom";
    customType: string;
    data?: unknown;
} | {
    type: "custom_message";
    customType: string;
    content: string | (TextContent | ImageContent)[];
    display: boolean;
} | {
    type: "label";
    targetId: string;
    label: string | undefined;
} | {
    type: "session_info";
    name?: string;
});
export interface V3Session {
    id: string;
    createdAt: number;
    name: string | undefined;
    entriesById: ReadonlyMap<string, V3Entry>;
    branch: V3Entry[];
}
export declare function isV3SessionFile(path: string): boolean;
export declare function pathTo(entriesById: ReadonlyMap<string, V3Entry>, id: string | null): V3Entry[];
export declare function epochMillis(timestamp: string): number;
export declare function readV3Session(path: string): V3Session;
export {};
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