import type { Theme } from '@earendil-works/pi-coding-agent';
/** Strip ANSI escapes so we can inspect a rendered line's visible characters. */
export declare function plainText(line: string): string;
/** Split a `{name}` format template into its literal pre/post parts. Assumes
 * the template contains `{name}` (config validation enforces this); a
 * template without it degrades to rendering the bare name. */
export declare function splitFormat(format: string): [string, string];
/** Parse a `composer:set-label` bus payload: a non-empty string `text` sets
 * the label; anything else (absent, empty, wrong type) clears the override. */
export declare function parseLabelData(data: unknown): string | undefined;
/** Whether this tmux pane is selected by a focused client. */
export declare function paneHasFocusedClient(paneId: string | undefined, clients: string): boolean;
/** Read terminal focus events from raw stdin, preserving a split CSI prefix. */
export declare function parseFocusInput(carry: string, chunk: string): {
    focused: boolean | undefined;
    carry: string;
};
/** Truncate to `max` visible cells, appending an ellipsis when truncated. */
export declare function truncateCells(s: string, max: number): string;
export type Rgb = [number, number, number];
/** Resolve a theme token or hex colour to RGB. Returns null when the theme
 * doesn't emit a truecolor sequence for the token (e.g. 256-colour themes). */
export declare function resolveRgb(theme: Theme, color: string): Rgb | null;
/** Linear mix of two RGB colours; t=0 gives `a`, t=1 gives `b`. */
export declare function mixRgb(a: Rgb, b: Rgb, t: number): Rgb;
/** Fully saturated rainbow colour, hue-rotating once per `periodMs`. */
export declare function rainbowRgb(periodMs: number): Rgb;
/** Paint text with a truecolor foreground. */
export declare function rgbColor(rgb: Rgb, text: string): string;
/** Apply a colour by theme token or hex value. Hex takes precedence. */
export declare function applyColor(theme: Theme, color: string, text: string): string;