import type { MarkdownStreamCache } from "../../ui-core/rendering/streaming-markdown.js";
import type { TranscriptItem, TranscriptState } from "../../ui-core/state/transcript-types.js";
import type { InkTheme } from "../render/ink-theme.js";
import { type BlockContext, type SpoolReader } from "../blocks/block-context.js";
import { type IntroBlockInput } from "../blocks/intro-lines.js";
export type BlockKind = "intro" | "user" | "assistant" | "thinking" | "tool" | "batch" | "diff" | "compacted" | "notice" | "turn-summary";
export interface FeedBlock {
    readonly key: string;
    readonly itemId: string;
    readonly kind: BlockKind;
    readonly open: boolean;
    readonly lines: readonly string[];
    readonly turnId: string | undefined;
    readonly sequence: number;
}
/** Hard ceiling on a single block; beyond it the pager owns the content. */
export declare const MAX_BLOCK_ROWS = 400;
export declare const INTRO_ITEM_ID = "intro";
export interface FeedViewInput {
    readonly columns: number;
    readonly ink: InkTheme;
    /** Injected so every builder stays deterministic under test. */
    readonly now: number;
    readonly spool?: SpoolReader | undefined;
    /** Bumped by `/clear`, `/new`, `/clean` so `<Static>` keys never collide. */
    readonly generation: number;
    readonly intro?: IntroBlockInput | undefined;
    readonly markdownCaches?: ReadonlyMap<string, MarkdownStreamCache> | undefined;
}
export declare function blockContextFor(state: TranscriptState, view: FeedViewInput): BlockContext;
export declare function toolBlockKind(item: Extract<TranscriptItem, {
    kind: "tool";
}>): BlockKind;
/**
 * Pure projection of transcript state onto exact-height renderable blocks.
 * Same inputs always yield identical output — no clock, no randomness, no
 * process reads.
 */
export declare function buildFeedBlocks(state: TranscriptState, view: FeedViewInput): readonly FeedBlock[];