import { Tool } from '../tool.js';
import { ExecutionContext } from '../types.js';
export type NextToolHandler = (name: string, context?: ExecutionContext) => Promise<Tool | undefined>;
/**
 * The slice of NitroStackServer a transform is allowed to reach back into.
 * `resolveTool` walks the full transform chain, so transforms that dispatch
 * tools themselves (e.g. Code Mode) route through it rather than holding a
 * private catalog, which would bypass downstream authorization transforms.
 */
export interface TransformRegistry {
    resolveTool(name: string, context?: ExecutionContext): Promise<Tool | undefined>;
    getTools(): Map<string, Tool>;
}
export interface McpTransform {
    readonly name: string;
    /**
     * Called once when the transform is attached to a server.
     */
    onRegister?(registry: TransformRegistry): void;
    /**
     * Releases resources held by the transform (worker threads, timers).
     * Invoked by NitroStackServer.stop().
     */
    dispose?(): Promise<void> | void;
    /**
     * Reshapes, filters, or augments the catalog during tools/list.
     */
    transformTools?(tools: Tool[], context?: ExecutionContext): Promise<Tool[]> | Tool[];
    /**
     * Resolves synthetic or re-routed tools during tools/call.
     */
    resolveTool?(name: string, next: NextToolHandler, context?: ExecutionContext): Promise<Tool | undefined>;
}
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