/**
 * Read historical task evidence through canonical stores and resolve file-level provenance.
 *
 * Code placed in `packages/core/` per Package-Boundary Check — verified
 * against AGENTS.md. Evidence discovery never rewrites historical verification.
 */
import type { KnowledgeCoverage, TaskKnowledgeEvidence } from '@cleocode/contracts';
/**
 * Discover explicit file evidence, verification atoms, commits, and canonical attachments.
 * @param taskId - Task whose historical evidence should be resolved.
 * @param projectRoot - Canonical project root, independent of the configured source root.
 * @param existingCoverage - Optional shared assessment to enrich with evidence limitations.
 * @param deadline - Absolute assessment deadline; defaults to two seconds from invocation.
 * @returns Deduplicated file associations, provenance, and unresolved findings.
 * @remarks File evidence never establishes that every symbol in a file changed.
 * @example
 * ```ts
 * const footprint = await getTaskKnowledgeEvidence('T448', projectRoot, undefined, Date.now() + 2000);
 * ```
 */
export declare function getTaskKnowledgeEvidence(taskId: string, projectRoot: string, existingCoverage?: KnowledgeCoverage, deadline?: number): Promise<TaskKnowledgeEvidence>;
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