/**
 * ConfigChange hook event.
 *
 * Fires when a Claude Code configuration file changes during a session
 * (user/project/local settings, policy settings, or skills). A handler
 * can return `decision: "block"` to prevent the config change from taking
 * effect — except `policy_settings` changes, which cannot be blocked.
 * Supports a matcher on `source`.
 * See https://code.claude.com/docs/en/hooks#configchange.
 *
 * @since 0.1.0
 */
import * as Effect from 'effect/Effect';
import * as Schema from 'effect/Schema';
import type { HookContext } from '../Context.js';
import type { HookDefinition } from '../Runner.js';
export declare const ConfigSource: Schema.Literals<readonly ["user_settings", "project_settings", "local_settings", "policy_settings", "skills"]>;
declare const Input_base: Schema.Class<Input, Schema.Struct<{
    readonly hook_event_name: Schema.Literal<"ConfigChange">;
    readonly source: Schema.Literals<readonly ["user_settings", "project_settings", "local_settings", "policy_settings", "skills"]>;
    readonly file_path: Schema.optional<Schema.String>;
    readonly session_id: Schema.String;
    readonly transcript_path: Schema.String;
    readonly cwd: Schema.String;
    readonly permission_mode: Schema.optionalKey<Schema.String>;
    readonly effort: Schema.optionalKey<typeof import("../Envelope.js").HookEffort>;
    readonly agent_id: Schema.optionalKey<Schema.String>;
    readonly agent_type: Schema.optionalKey<Schema.String>;
}>, {}>;
export declare class Input extends Input_base {
}
declare const Output_base: Schema.Class<Output, Schema.Struct<{
    readonly decision: Schema.optional<Schema.Literal<"block">>;
    readonly reason: Schema.optional<Schema.String>;
    readonly continue: Schema.optional<Schema.Boolean>;
    readonly stopReason: Schema.optional<Schema.String>;
    readonly suppressOutput: Schema.optional<Schema.Boolean>;
    readonly systemMessage: Schema.optional<Schema.String>;
    readonly terminalSequence: Schema.optional<Schema.String>;
}>, {}>;
export declare class Output extends Output_base {
}
export declare const allow: () => Output;
export declare const block: (reason: string) => Output;
export declare const define: (config: {
    readonly handler: (input: Input) => Effect.Effect<Output, unknown, HookContext.Service>;
}) => HookDefinition<Input, Output>;
/**
 * Build a ConfigChange hook that only handles matching `source` values.
 *
 * @category Constructors
 * @since 0.1.0
 */
export declare const onMatcher: (config: {
    readonly matcher: string | RegExp;
    readonly handler: (input: Input) => Effect.Effect<Output, unknown, HookContext.Service>;
    readonly onMismatch?: (input: Input) => Effect.Effect<Output, unknown, HookContext.Service>;
}) => HookDefinition<Input, Output>;
export {};
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