import { type StreamStyles } from '@williamthorsen/nmr-core';
/**
 * Resolves the style of the running process's own output streams, and rejects a variable naming no style.
 *
 * What a standalone bin calls. A bin carries no `--output-style` of its own: the flag is `nmr`'s, and what
 * reaches a bin is the variable that `nmr <command>` exports to it, so a bin run through nmr renders as nmr
 * does and one run on its own detects its streams.
 *
 * Throws rather than exiting, so the bin's own boundary reports the message and sets the exit code, as it does
 * for every other failure in what the caller declared.
 */
export declare function resolveBinStyles(): StreamStyles;