import type { BuiltInParserName } from 'prettier';
/**
 * Pick a Prettier parser from the target file name.
 *
 * Returns `undefined` for formats Prettier has no parser for (`.sql`, `.py`,
 * `.txt`, …). Callers must treat that as "write this content verbatim" — it is
 * not an error. Historically every write was parsed as TypeScript, so any
 * non-TS artefact threw and was dropped by writeFileSafely's catch.
 */
export declare function parserForFile(filePath: string): BuiltInParserName | undefined;
/**
 * Format `content` with Prettier.
 *
 * `filePath` selects the parser. When it is omitted the content is parsed as
 * TypeScript, preserving the original behaviour for the core schema writers.
 * Content that Prettier cannot parse is returned unchanged rather than throwing,
 * so a formatting problem can never cost the caller its file.
 */
export declare const formatFile: (content: string, filePath?: string) => Promise<string>;