import type { Message } from "@earendil-works/pi-ai";
import type { TraceStructuredOutput } from "../types/output.js";
/**
 * Strip markdown code block fences from the start/end of a string when the
 * ENTIRE string is wrapped in a fence. Returns the original string if no
 * complete fence is found.
 *
 * Matches:
 *   ^\s*```(?:\w+)?\s*\n  ...  \n\s*```\s*$
 *
 * Uses a greedy inner capture so nested fences are preserved.
 */
export declare function unwrapMarkdownCodeBlock(text: string): string;
/**
 * Extract a structured JSON output block from the end of an assistant's text for trace flow.
 *
 * Looks for a final ```json ... ``` code block, parses it, and validates
 * against the TraceStructuredOutput schema. Returns undefined when the block
 * is missing, malformed, or fails validation.
 */
export declare function extractTraceStructuredOutput(text: string): TraceStructuredOutput | undefined;
/**
 * Automatically resolve tool_ids to verbatim args + output
 */
export declare function resolveToolEvidence(toolIds: string[], messages: Message[], parentBranch: unknown[]): string;
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