/**
 * TOON — Token-Optimized Object Notation.
 *
 * A compact, deterministic, line-oriented text format for Reticle snapshots and query results.
 * This is a ONE-WAY, encode-only projection of the internal JSON representation (there is no decoder
 * back to JSON — the agent reads TOON, it is never parsed back). Not a binary format — Claude must be
 * able to generate and read it reliably from its training data alone.
 *
 * Grammar (one element per line):
 * type ref "name" [states] key=value...
 *
 * Element types (abbreviated roles):
 * btn button inp textbox/input sel combobox/listbox chk checkbox
 * rad radio lnk link img img dlg dialog/alertdialog
 * nav navigation lst list/listbox tab tab/tabpanel hdr heading
 * frm form mn menu/menubar fld group/fieldset el (any other role)
 *
 * State flags (inside []):
 * vis visible hid hidden en enabled dis disabled
 * chk checked exp expanded focus focused
 * (`present` is on every element, so it is never encoded — see STATE_FLAG.)
 *
 * Attributes (key=value, space-separated):
 * val="..." current value of the element
 * count=N child count (for containers, replaces expanding children)
 * ph="..." placeholder text
 */
/** Encode an ElementDescriptor to a TOON line. */
export interface ToonElement {
    ref: string;
    role: string;
    name: string;
    value?: string;
    states?: string[];
    visible?: boolean;
    text?: string;
    children?: ToonElement[];
    childCount?: number;
}
/** Encode an array of ElementDescriptor-shaped objects to TOON text. */
export declare function toToon(elements: ToonElement[]): string;
/** Encode a single reticle_snapshot or reticle_query result object to TOON. */
export declare function resultToToon(result: Record<string, unknown>): string;
/** Whether a tool result object should be encoded as TOON (has an elements array). */
export declare function isToonable(result: unknown): boolean;