import { type VerifyPolicy } from "../work-items/verify-policy.js";
/**
 * Argument validation for the Todo tools: the shape checks every handler runs
 * before it touches the gateway.
 *
 * Each one fails with a message that names the field and says what would be
 * accepted, because the caller is a model reading the error and retrying — a
 * bare "invalid input" costs a whole round trip to learn nothing.
 */
export declare const FILTER_CHAR_CAP = 256;
export declare const WORK_ITEM_LABELS_MAX = 100;
export declare const RELATION_KINDS: readonly ["blocks", "relates", "duplicates"];
export declare function assertLength(name: string, value: string, max: number): void;
export declare function requireString(args: Record<string, unknown>, name: string, max?: number): string;
export declare function requireTodoId(args: Record<string, unknown>): string;
export declare function requireTodoIdField(args: Record<string, unknown>, name: string): string;
export declare function optionalTodoIdField(args: Record<string, unknown>, name: string): string | undefined;
export declare function requireRelationKind(args: Record<string, unknown>): (typeof RELATION_KINDS)[number];
export declare function requireLabelRefs(args: Record<string, unknown>): string[];
/** Which label operation this call is, as the route's own body: `mode` names what
 *  to do with `labels`, and its absence is what replacing the whole set looks like. */
export declare function requireLabelChange(args: Record<string, unknown>): Record<string, string[]>;
export declare function optionalString(args: Record<string, unknown>, name: string, max?: number): string | undefined;
export declare function optionalEnum<T extends readonly string[]>(args: Record<string, unknown>, name: string, values: T): T[number] | undefined;
export declare function clampInt(value: unknown, fallback: number, min: number, max: number): number;
/** Shape only — whether the names exist is decided against the live skills
 *  directory server-side, which is the only place that can know. */
export declare function requireSkillNames(args: Record<string, unknown>): string[];
/** The declared verify policy, refused with the same named error the gateway
 *  route would give it, or undefined when the caller declared none. */
export declare function validatedVerifyPolicy(args: Record<string, unknown>): VerifyPolicy | null | undefined;
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