import type { AppServices } from "../../ui-core/bootstrap/composition-root.js";
import type { TranscriptState } from "../../ui-core/state/transcript-types.js";
import type { IntroBlockInput } from "../blocks/intro-lines.js";
import type { BlockContext } from "../blocks/block-context.js";
import { type FeedBlock } from "../feed/feed-blocks.js";
import { type TranscriptWindow } from "../feed/transcript-window.js";
import { type InkTheme } from "../render/ink-theme.js";
export interface FeedSnapshot {
    readonly ink: InkTheme;
    readonly context: BlockContext;
    readonly blocks: readonly FeedBlock[];
    readonly window: TranscriptWindow;
    /** Shell width + generation the window geometry was computed for. */
    readonly columns: number;
    readonly generation: number;
}
export declare function introInputFor(services: AppServices): IntroBlockInput;
export declare function useInkTheme(services: AppServices): InkTheme;
export interface FeedLedgerState {
    generation: number;
    committedCount: number;
    consumedBoundaryToken: number;
}
export interface UseFeedInput {
    readonly services: AppServices;
    readonly state: TranscriptState;
    readonly columns: number;
    readonly liveBudgetRows: number;
    readonly now: number;
    readonly generation: number;
    /** Rows hidden below the viewport; `0` pins the window to the newest row. */
    readonly liveOffset: number;
    readonly intro: IntroBlockInput | undefined;
}
/**
 * Projects transcript state onto one virtualized scroll page: the intro card
 * is the first block and the whole page renders through a line-exact window
 * anchored `liveOffset` rows above the bottom — the OpenTUI scrollbox model.
 */
export declare function useFeed(input: UseFeedInput): FeedSnapshot;