/**
 * Pure utility functions for tool delegation.
 *
 * Extracted from tool-delegation.ts to satisfy the ≤500 LOC gate (GA-4).
 * These are stateless pure functions with no class dependencies.
 *
 * @module session-tracker/tool-delegation-utils
 */
/**
 * Returns safe, pruned tool input metadata for child-session JSON journeys.
 *
 * @param tool - Tool name.
 * @param args - Raw tool args.
 * @returns Pruned metadata matching the main-session markdown capture policy.
 */
export declare function pruneToolInput(tool: string, args: unknown): Record<string, unknown>;
/**
 * Returns safe, pruned output metadata for child-session JSON journeys.
 *
 * @param tool - Tool name.
 * @param output - Raw tool output.
 * @param metadata - Raw tool metadata.
 * @returns Pruned output metadata.
 */
export declare function pruneToolOutput(tool: string, output: unknown, metadata: unknown): Record<string, unknown>;
/**
 * Extracts a task session ID from task tool output or direct values.
 *
 * @param value - Raw output or task ID value.
 * @returns Extracted session ID, or undefined.
 */
export declare function extractTaskID(value: unknown): string | undefined;
/**
 * Extracts completed child-session content from a task tool result.
 *
 * @param value - Raw task tool output.
 * @param taskID - Child task/session identifier to remove from the payload.
 * @returns Result content, or undefined for dispatch-only output.
 */
export declare function extractTaskResult(value: unknown, taskID: string): string | undefined;
/**
 * Derives a subagent type string from session metadata with fallback chain.
 *
 * Priority:
 * 1. Parse from session title via naming service (most authoritative)
 * 2. Explicit subagentType param (if not "unknown")
 * 3. Agent name (if not "unknown")
 * 4. "unknown" (last resort)
 *
 * @param sessionTitle - Optional session title to parse.
 * @param explicitSubagentType - Optional explicit subagent type.
 * @param agent - Optional agent name.
 * @returns Derived subagent type string.
 */
export declare function deriveSubagentType(sessionTitle?: string, explicitSubagentType?: string, agent?: string): string;
/**
 * Derives an agent name from session metadata by parsing the session title.
 *
 * @param input - Record containing title or sessionTitle.
 * @returns Parsed agent name, or undefined if not parseable.
 */
export declare function deriveAgentNameFromSession(input: Record<string, unknown>): string | undefined;
/**
 * Safely narrows an unknown value to a record.
 *
 * @param value - Unknown value to inspect.
 * @returns The value as a record, or an empty object.
 */
export declare function asRecord(value: unknown): Record<string, unknown>;
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