/**
 * Extract the first JSON object from arbitrary LLM output.
 *
 * Even with a strict "reply with JSON only" prompt, models occasionally wrap
 * the payload in ```json fences, prepend "Here you go:", or leak trailing
 * prose. This helper isolates the first balanced `{...}` block and parses it,
 * stripping optional ```json / ``` fences first.
 *
 * Throws if no valid object is present. Consumers that want a soft failure
 * should wrap it in try/catch — that's usually the right shape when using
 * this from inside an `AgentTool.execute` (return the parse error as the
 * tool-result string so the model re-asks the user).
 */
export declare function extractFirstJsonObject<T = unknown>(raw: string | null | undefined): T;
/** Same as `extractFirstJsonObject`, but returns `null` on any parse failure. */
export declare function tryExtractFirstJsonObject<T = unknown>(raw: string | null | undefined): T | null;
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