import type { ToolCallId } from "../../app/events/app-event.js";
import type { BoundedTextState } from "../../app/events/event-buffer.js";
import type { MarkdownStreamCache } from "../../ui-core/rendering/streaming-markdown.js";
import type { TranscriptState } from "../../ui-core/state/transcript-types.js";
import type { Glyphs } from "../render/glyphs.js";
import type { InkTheme } from "../render/ink-theme.js";
/** Read side of `OutputSpool`; keeps builders decoupled from the class. */
export interface SpoolReader {
    tail(toolCallId: ToolCallId): string;
    state(toolCallId: ToolCallId): BoundedTextState | undefined;
}
export declare const EMPTY_SPOOL: SpoolReader;
/**
 * Everything a block builder may read. Nothing here is derived from process
 * state at build time — `now` is injected so every builder stays deterministic.
 */
export interface BlockContext {
    /** Content columns available to a block: `columns - 2`. */
    readonly width: number;
    readonly ink: InkTheme;
    readonly glyphs: Glyphs;
    readonly now: number;
    readonly state: TranscriptState;
    readonly spool: SpoolReader;
    readonly markdownCache: MarkdownStreamCache | undefined;
}
/** Suffix threshold — keep timings visible; below this the label is clipped not dropped. Classic shows timings even at 40 cols. */
export declare const SUFFIX_MIN_COLUMNS = 44;
export declare function separator(ctx: BlockContext): string;
export declare function joinMeta(ctx: BlockContext, parts: readonly (string | undefined)[]): string;
export declare function clipRow(ctx: BlockContext, text: string): string;
export declare function formatElapsed(ms: number): string;
export declare function hiddenLinesTrailer(ctx: BlockContext, hidden: number, chord: string, extra?: string): string | undefined;