/**
 * Work Item creation — validation and field mapping.
 *
 * Pure functions used by AdoClient.createWorkItem and by tool handlers
 * to validate creation requests against project configuration rules
 * and map input fields to ADO JSON Patch operations.
 */
/**
 * Build JSON Patch operations from input fields to ADO API field paths.
 *
 * Only known fields are mapped; unknown keys are silently ignored.
 * All operations use "add" semantics.
 *
 * @param fields - Standard fields mapped via FIELD_MAP (title, description, etc.)
 * @param customFields - Arbitrary ADO fields where keys are full ADO paths
 *   (e.g. "/fields/Custom.Sponsors") and values are the field values.
 *   These are appended as direct "add" patch operations.
 */
export declare function buildFieldPatchOps(fields: Record<string, unknown>, customFields?: Record<string, string>): Array<{
    op: string;
    path: string;
    value: unknown;
}>;
/**
 * Validate work item creation against project config rules.
 *
 * Returns `null` if valid, or an error string describing the first
 * validation failure encountered.
 */
export declare function validateWorkItemCreation(config: {
    work_item: {
        create: {
            enabled: boolean;
            allowed_types: string[];
            required_fields: string[];
            default_state: string;
            auto_assign: boolean;
            require_parent: boolean;
            default_type: string;
        };
    };
}, args: {
    type: string;
    fields: Record<string, unknown>;
    parentId?: number;
}): string | null;
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