/**
 * Pure helpers for project tasks — normalization, serialization, patch application.
 * Keeps CodeIndexDB and MCP handlers thin (Single Responsibility).
 */
import type { ProjectTask, ProjectTaskDocument, ProjectTaskPriority, ProjectTaskSource, ProjectTaskStatus, UpdateProjectTaskPatch } from '../types/projectTask.js';
export declare const PROJECT_TASK_STATUSES: readonly ProjectTaskStatus[];
export declare const PROJECT_TASK_SOURCES: readonly ProjectTaskSource[];
export declare function normalizeTaskStatus(value: unknown, fallback: ProjectTaskStatus): ProjectTaskStatus;
export declare function normalizeTaskSource(value: unknown, fallback: ProjectTaskSource): ProjectTaskSource;
export declare function normalizeTaskPriority(value: unknown): ProjectTaskPriority | undefined;
export declare function normalizeStringList(value: unknown): string[];
export declare function coerceSortOrder(value: unknown): number;
export declare function storedSortOrder(doc: ProjectTaskDocument): number;
/**
 * API shape for stored rows (legacy docs may omit structured fields).
 */
export declare function serializeProjectTask(doc: ProjectTaskDocument): ProjectTask;
/**
 * Builds a typed patch from MCP/JSON input — ignores unknown keys (no arbitrary spread onto DB).
 */
export declare function sanitizeUpdatePatch(raw: unknown): UpdateProjectTaskPatch;
export declare function applyProjectTaskPatch(doc: ProjectTaskDocument, patch: UpdateProjectTaskPatch, nowIso: string): void;
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