/**
 * Client helpers of the worktree (S2) view: the mirror of the server's
 * close-reason cap (the same discipline `brief-view.ts` applies to the
 * journal cap) and the lane-kind probe the view's actions branch on.
 * @module dsh-client-ui-mimir/client/worktree-view
 */
import type { ResearchWorktreeView } from 'dsh-mimir/types';
/** Mirror of the server's `IDEA_CLOSE_REASON_MAX_CHARS` (the documented-No cap). */
export declare const WORKTREE_REASON_MAX_CHARS = 48;
/** Draft state of one close reason (the documented-No input box). */
export type CloseReasonState = 'empty' | 'ok' | 'too-long';
/** Validate one close-reason draft client-side; the server re-validates. */
export declare function closeReasonState(reason: string): CloseReasonState;
/**
 * Whether one lane is an idea line (closeable, parent-declarable). Project
 * lanes (`project:<id>`) can carry the mainline ref but never a parent or a
 * close in v1.
 */
export declare function isIdeaLane(lineId: string): boolean;
/** One memorable beat of the trajectory (the highlight strip's row). */
export interface WorktreeHighlight {
    readonly kind: 'mainline' | 'busiest' | 'eureka' | 'adopted' | 'failed';
    /** The headline figure or name. */
    readonly value: string;
    /** The human framing around it (locale copy wraps this). */
    readonly detail: string;
}
/**
 * Distil a worktree into its memorable beats — the trajectory's highlights,
 * not its raw counters. Deliberately descriptive: "the主线 moved 3 times"
 * is a fact about attention spent, never advice about where to spend more.
 *
 * Pure and order-independent; an empty worktree yields no highlights rather
 * than invented ones.
 * @param view - the derived worktree.
 * @returns the highlights, most structurally significant first.
 */
export declare function worktreeHighlights(view: ResearchWorktreeView): readonly WorktreeHighlight[];
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