import type { KeyId } from "../../config/keybindings";
import type { SessionMessageEntry } from "../../session/session-manager";
import type { SessionObserverRegistry } from "../session-observer-registry";
import { type TranscriptViewerEntry, TranscriptViewerOverlay } from "./transcript-viewer-overlay";
export declare const __sessionObserverProjectionCounters: {
    enabled: boolean;
    projectionFullRuns: number;
    projectionIncrementalRuns: number;
    sourceMessagesProjected: number;
    projectedEntriesAppended: number;
    resultPatchCount: number;
    snapshot(): {
        projectionFullRuns: number;
        projectionIncrementalRuns: number;
        sourceMessagesProjected: number;
        projectedEntriesAppended: number;
        resultPatchCount: number;
    };
    enable(): void;
    disable(): void;
    reset(): void;
};
/** Session-observer adapter. The shared viewer owns navigation and fold state. */
export declare class SessionObserverOverlayComponent extends TranscriptViewerOverlay {
    #private;
    constructor(registry: SessionObserverRegistry, onDone: () => void, observeKeys: KeyId[]);
    refreshFromRegistry(): void;
    handleInput(keyData: string): void;
}
/**
 * This deliberately remains the eager full-history projection. PR2 owns projection
 * virtualization/incrementalization; source acquisition above only controls snapshot safety.
 */
export declare function entriesFromMessages(entries: readonly SessionMessageEntry[]): TranscriptViewerEntry[];