export type TranscriptItemKind = "user" | "assistant-text" | "assistant-thinking" | "tool" | "read-group" | "custom";
export type TranscriptItemCapabilities = {
    copyable: boolean;
    foldable: boolean;
    rawViewable: boolean;
};
export type TranscriptSourcePayload = {
    text: string;
    metadata: Readonly<Record<string, unknown>>;
    source: unknown;
};
export type TranscriptItem = {
    id: string;
    kind: TranscriptItemKind;
    source: unknown;
    getPayload?: (source: unknown) => TranscriptSourcePayload;
    capabilities?: Partial<TranscriptItemCapabilities>;
};
export type RegisterTranscriptItem = Omit<TranscriptItem, "id"> & {
    id?: string;
};
export type StreamingItemOptions = Omit<RegisterTranscriptItem, "id" | "kind"> & {
    promptGeneration: number | string;
    messageOrdinal: number;
    kind?: "assistant-text" | "assistant-thinking";
};
/** Stable transcript identities shared by the inline and overlay projections. */
export declare const transcriptItemId: {
    entry: (entryId: string) => string;
    assistantContent: (entryId: string, contentIndex: number) => string;
    tool: (toolCallId: string) => string;
    readGroup: (groupId: string) => string;
    custom: (customId: string) => string;
    stream: (promptGeneration: number | string, messageOrdinal: number) => string;
};
/**
 * A session-local index of transcript projection items. It deliberately stores only
 * structural sources, allowing interactive mode to supply live streaming objects
 * and persisted session records without importing either implementation here.
 */
export declare class TranscriptItemRegistry {
    #private;
    get sessionId(): string | undefined;
    /** Ordered snapshot for read-only transcript projections. */
    items(): readonly TranscriptItem[];
    register(item: RegisterTranscriptItem): string;
    replace(id: string, item: Omit<TranscriptItem, "id">): boolean;
    startStream(options: StreamingItemOptions): string;
    /** Reconciles one exact live stream with its persisted canonical item. */
    endStream(streamId: string, item: RegisterTranscriptItem): string | undefined;
    retireStream(id: string): boolean;
    coalesceReadGroup(groupId: string, source: unknown, toolCallIds?: readonly string[]): string;
    rebuild(items: readonly RegisterTranscriptItem[]): void;
    evict(id: string): boolean;
    switchSession(sessionId: string): void;
    resolveSourcePayload(id: string): TranscriptSourcePayload | undefined;
    capabilities(id: string): TranscriptItemCapabilities | undefined;
    has(id: string): boolean;
    canonicalId(id: string): string | undefined;
}