import type { Message } from "../types.js";
import type { ToolDefinition } from "../../tool/index.js";
import { type SkillToolAvailability } from "../../skill/allowed-tools.js";
import { type SkillDelegationOverrides } from "./skill-delegation-overrides.js";
export declare const LOAD_SKILL_TOOL_ID = "load_skill";
export declare const FORM_INPUT_TOOL_ID = "form_input";
export declare const INVOKE_AGENT_TOOL_ID = "invoke_agent";
export declare const SUBMITTED_FORM_INPUT_CONTEXT_KEY = "hasSubmittedFormInputResult";
export declare const INACTIVE_SKILL_TOOL_AVAILABILITY: SkillToolAvailability;
export type ActiveSkillState = {
    activeSkillId: string | undefined;
    activeSkillToolAvailability: SkillToolAvailability;
    activeSkillDelegationOverrides: SkillDelegationOverrides | undefined;
};
export declare function hydrateActiveSkillStateFromMessages(messages: readonly Message[]): ActiveSkillState;
export declare function extractSkillId(result: unknown): string | undefined;
export declare function extractSkillToolAvailability(result: unknown): SkillToolAvailability | undefined;
/** Apply only a validated body-load response; reference/error results preserve state. */
export declare function applySkillActivationResult(current: ActiveSkillState, result: unknown): ActiveSkillState;
export declare function isSubmittedFormInputResult(result: unknown): boolean;
export declare function hasSubmittedFormInputResult(messages: readonly Message[]): boolean;
export declare function filterToolsAfterSubmittedFormInput(tools: readonly ToolDefinition[], messages: readonly Message[], runtimeContext?: Record<string, unknown>, activeSkill?: {
    id?: string;
    toolAvailability?: SkillToolAvailability;
}): ToolDefinition[];
export type SkillPolicyResult = {
    allowed: true;
} | {
    allowed: false;
    error: string;
};
export type SkillPolicyOptions = {
    hasSubmittedFormInput?: boolean;
    skillToolAvailability?: SkillToolAvailability;
    activeSkillId?: string;
    toolInput?: unknown;
};
/** Identify a valid skill-body activation call without confusing reference reads for activation. */
export declare function isSkillBodyLoadRequest(toolName: string, input: unknown): boolean;
export declare function enforceSkillPolicy(toolName: string, options?: SkillPolicyOptions): SkillPolicyResult;
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