import type { SubagentChildPolicy } from "./extensions/types.ts";
export declare function createToolNameMatcher(entries: Iterable<string>): (name: string) => boolean;
export declare function isMcpToolName(name: string): boolean;
interface ToolSelection {
    _allowedToolNames?: Set<string>;
    _allowedTools?: (name: string) => boolean;
    _excludedTools?: (name: string) => boolean;
    _subagentPolicy?: SubagentChildPolicy;
}
export declare function isRegisteredToolAllowed(selection: ToolSelection, name: string): boolean;
export declare function isToolActivatable(selection: ToolSelection, name: string, exposure: string, hasToolSearch: boolean): boolean;
interface SelectedTools {
    _usesDefaultTools: boolean;
    _appliedDefaultTools: ReadonlySet<string>;
    _allowedToolNames?: ReadonlySet<string>;
    _initialActiveToolNames?: readonly string[];
}
/** Tool names the session's selection asked for, whether or not a tool with each name has registered yet. */
export declare function selectedToolNames(selection: SelectedTools): ReadonlySet<string>;
/**
 * Default-active tools activate whenever they register. An opt-in tool (`defaultActive: false`)
 * activates only on its first registration, and only when the selection names it, such as
 * `defaultTools: ["+codemode"]` whose extension loads after the session starts. A reload keeps
 * whatever activation the session has given an already registered opt-in tool since.
 */
export declare function activatesOnRegistration(selection: SelectedTools, name: string, definition: {
    exposure?: string;
    defaultActive?: boolean;
} | undefined, alreadyRegistered: boolean): boolean;
export {};
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