import type { ValidationStatus } from "./doctor.js";
/**
 * Decide whether ANSI color should be emitted. `NO_COLOR` (any value) always
 * wins per the no-color.org convention; `FORCE_COLOR` forces the decision when
 * set to a recognized truthy/falsy value; otherwise color follows the TTY-ness
 * of the stream. Pure and env-injected so it is trivially testable.
 */
export declare function computeColorEnabled(env: Record<string, string | undefined>, isTty: boolean | undefined): boolean;
export declare function isColorEnabled(): boolean;
/** Color/weight helpers. Each is the identity function when color is disabled. */
export declare const style: {
    readonly bold: (text: string) => string;
    readonly dim: (text: string) => string;
    readonly red: (text: string) => string;
    readonly green: (text: string) => string;
    readonly yellow: (text: string) => string;
    readonly cyan: (text: string) => string;
    readonly gray: (text: string) => string;
};
/**
 * Render a status badge as a fixed-width prefix (badge + trailing space). With
 * color on it is a green/yellow/dim/red glyph; with color off it falls back to
 * an equal-width ASCII tag so columns still line up in plain output.
 */
export declare function badge(status: ValidationStatus): string;
/**
 * Render aligned `label  value` rows: labels are padded to the widest label so
 * values line up, replacing the hand-tuned `padEnd` blocks. `indent` prefixes
 * every row with that many spaces (used to nest rows under a section rule).
 * Returns one string with a trailing newline per row (empty when there are no
 * rows).
 */
export declare function keyValue(rows: ReadonlyArray<readonly [label: string, value: string]>, indent?: number): string;
/**
 * A horizontal section divider, optionally labeled — `── instance ────────`.
 * Width tracks the terminal (read at call time so resizes are honored), capped
 * for readability and falling back to a fixed width when stdout is not a TTY.
 * Rendered dim/gray (identity when color is off); the label appears verbatim so
 * it stays greppable. Always ends with a newline.
 */
export declare function rule(label?: string): string;
/** Badge for a channel status *kind* string (running/waiting…/disabled/error). */
export declare function channelBadge(kind: string): string;
/** Badge for a trace-source health word (running/stale/stopped/…). */
export declare function healthBadge(health: string): string;
/** A bold/cyan section heading with a trailing newline. */
export declare function heading(text: string): string;
/** The CLI title block: bold title plus an optional dim subtitle. */
export declare function banner(title: string, subtitle?: string): string;
/** A red error line (✗ prefix) with a trailing newline — write to stderr. */
export declare function errorLine(message: string): string;
/** A dim hint line (→ prefix) with a trailing newline. */
export declare function hint(message: string): string;
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