/**
 * Tool registry — in-memory list of registered Tool implementations.
 *
 * The CLI populates the registry at startup (first-party tools as
 * direct imports, third-party tools via tool-package-discovery), then
 * iterates `list()` to build its command tree.
 *
 * **Duplicate-id policy: first writer wins.** Re-registering the same
 * id keeps the existing entry and emits a structured warning. This
 * matches `LanguageRegistry`'s policy and prevents third-party plugins
 * from accidentally clobbering first-party registrations.
 *
 * Implemented on top of the kernel's `Registry<T>` base. Tools don't
 * naturally satisfy `Registerable` (no `name` field on metadata), so
 * the registry wraps each Tool in a `{ id, name: id, tool }` envelope
 * before storing it. `list()` / `get()` unwrap.
 */
import type { Tool } from './types.js';
/** Per-run registry of {@link Tool} plugins, indexed by id. */
export declare class ToolRegistry {
    private readonly inner;
    /**
     * Register a tool. **First writer wins** — re-registering the same
     * id is a no-op and emits a `tool.registry.duplicate` warning.
     */
    register(tool: Tool, opts?: {
        sourcePackage?: string;
    }): void;
    list(): readonly Tool[];
    get(id: string): Tool | undefined;
    clear(): void;
}
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