/**
 * [WHO]: Provides formatTaskState(), formatSnapshot(), describeDecision(), describeTerminalSnapshot(), describeTaskState(), buildCompletionReport()
 * [FROM]: Depends on ./grub-feature-list, ./grub-i18n, ./grub-types for human-readable /grub TUI copy
 * [TO]: Consumed by ./index.ts and tests for status/result rendering
 * [HERE]: extensions/builtin/grub/grub-format.ts - user-facing formatting boundary for Grub status messages
 */
import { type GrubLocale } from "./grub-i18n.js";
import type { GrubDecision, GrubTaskSnapshot, GrubTaskState } from "./grub-types.js";
export declare function formatTaskState(task: GrubTaskState): string;
export declare function formatSnapshot(snapshot: GrubTaskSnapshot): string;
export declare function describeDecision(decision: GrubDecision, locale: GrubLocale): string;
/**
 * One-line completion report for the chat stream: runtime, turns, tool calls,
 * and token totals. Returns undefined when the task did not complete or no
 * run metrics were accumulated (e.g. metric folding was skipped).
 */
export declare function buildCompletionReport(snapshot: GrubTaskSnapshot): string | undefined;
export declare function describeTerminalSnapshot(snapshot: GrubTaskSnapshot | undefined, locale: GrubLocale): string;
export declare function describeTaskState(status: GrubTaskState["status"], phase: GrubTaskState["phase"], awaitingTurn: boolean, locale: GrubLocale): string;