/**
 * Extra actionable detail for an API error, appended after the flat message.
 *
 * A `rules_blocked` 422 carries the specific rule violations and whether
 * `force: true` would clear the refusal — the flat message alone omits both,
 * which leaves an agent blind-retrying `force` in a loop (error-severity never
 * clears with force; warnings do). Surfacing the payload here lets the agent
 * decide: fix the content, or force past warnings. Returns "" for any error
 * without a refusal payload, so it is safe to append to every catch.
 */
export declare function formatApiErrorDetail(error: unknown): string;
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