import { type BlockContext } from "../blocks/block-context.js";
import type { FeedBlock } from "./feed-blocks.js";
/** Rows an open assistant block keeps when it does not fit (03-RENDER-MODEL §6). */
export declare const ASSISTANT_LIVE_ROWS = 12;
/** Output rows kept from an open tool body, on top of the header row. */
export declare const TOOL_LIVE_BODY_ROWS = 8;
/** Hunk rows kept from an open diff body, on top of the header row. */
export declare const DIFF_LIVE_HUNK_ROWS = 8;
export interface BoundedBlock {
    readonly lines: readonly string[];
    readonly truncated: boolean;
}
/**
 * Bound an open block to the rows the live region can give it. The bounded form
 * never reaches scrollback — the committed copy is always the complete one.
 */
export declare function boundOpenBlock(ctx: BlockContext, block: FeedBlock, budget: number): BoundedBlock;
export interface LiveTailRow {
    readonly key: string;
    readonly block: FeedBlock;
    readonly lines: readonly string[];
}
export interface LiveTailPlan {
    readonly rows: readonly LiveTailRow[];
    /** Rows the plan occupies; always `<= budget`. */
    readonly height: number;
    /** True when content above the first visible row was dropped. */
    readonly clipped: boolean;
    readonly hiddenAbove: number;
}
/**
 * Fit live blocks into exactly the rows the allocator granted, newest last.
 * Pure so `frame-height` and invariant tests can assert it without Ink.
 */
export declare function planLiveTail(ctx: BlockContext, live: readonly FeedBlock[], budget: number): LiveTailPlan;