/** Rows written 2026-09-25 onward by captureToolResults-on apps. Read as "full". */
export declare const TOOL_ERROR_CAPTURE_METADATA_KEY = "__tool_error_capture_version";
/**
 * Stamped on every failed tool span: what `error_message` holds. `signature` is
 * a deliberate withholding (captureToolResults is off), never the same as a row
 * with no text.
 */
export declare const TOOL_ERROR_DETAIL_METADATA_KEY = "__tool_error_detail";
export declare function redactToolErrorMessage(value: string, options?: {
    truncated?: boolean;
}): string;
export declare function sanitizeToolErrorMessage(value: string): string;
/**
 * The part of a tool failure that is always recorded, even with
 * captureToolResults off: the first non-blank line, bounded. It is stored
 * without the owner opting in, so beyond credentials (a quoted secret can span
 * lines, so redact the whole text first) it also drops the emails and opaque
 * ids a failing tool echoes back. The `Error running <tool>: ` prefix is
 * dropped so signatures group by cause, and a JSON `{ error, message }` result
 * is summarized as `error: message` rather than its opening brace. Never
 * empty — an empty `error_message` reads as "no reason was captured", which is
 * a different fact from "the tool gave no text".
 */
export declare function toolErrorSignature(value: unknown): string;