/**
 * Parse a JSONC string (JSON + comments + trailing commas) into a value.
 *
 * On success returns the parsed value. On a structural error (anything `JSON.parse`
 * would also reject, e.g. a missing brace or a dangling property) it throws a `SyntaxError`
 * whose message names the first problem and its 0-based character offset, so the loader's
 * existing "Failed to read config …" diagnostics stay actionable.
 *
 * @param text The file contents.
 * @param sourceLabel Optional human-readable source name, included in the error message.
 */
export declare function parseJsonc(text: string, sourceLabel?: string): unknown;