/**
 * Tavily Diagnostics Capability (DESIGN.md §14, tech-plan §10, T08).
 *
 * Probes Tavily connectivity with a single, cheapest-possible request
 * — `/search` with `search_depth: "basic"` and a stub query — so the
 * doctor command can verify a credential authenticates without
 * burning plan credits.
 *
 * The probe intentionally avoids `/usage`. Tavily throttles `/usage`
 * to 10 requests per 10 minutes per key (tech-plan §10), which would
 * make a routine doctor run rate-limit itself. `/search` with basic
 * depth costs a single credit and is bounded by the search rate limit,
 * which is far more generous than the usage endpoint.
 *
 * Boundary rules (ARCHITECTURE.md §2):
 *   - May import the diagnostics capability contract, Adapter-local
 *     config, Adapter-local search transport, and normalized errors.
 *   - Must NOT import command presentation or another Provider's
 *     Adapter.
 */
import type { DiagnosticsCapability } from "../../capabilities/diagnostics.js";
import { type TavilyTransportDeps } from "./client.js";
/**
 * Options for the Tavily DiagnosticsCapability. The API key is
 * resolved from `env`; transport dependencies (`fetch`, timer) are
 * injectable for deterministic tests through the unified `transport`
 * seam.
 */
export interface TavilyDiagnosticsCapabilityOptions {
    readonly env: NodeJS.ProcessEnv;
    readonly transport?: TavilyTransportDeps;
}
/**
 * Build the Tavily DiagnosticsCapability. The probe performs ONE
 * `/search` request with `search_depth: "basic"` and a stub query so
 * it costs a single credit. Shared execution owns the retry policy;
 * this transport performs exactly one attempt per invocation.
 *
 * When `options.probe` is false, `invoke` resolves immediately without
 * touching the network — the doctor command skips probing unconfigured
 * or tools-disabled Providers before reaching this Capability.
 */
export declare function createTavilyDiagnosticsCapability(options: TavilyDiagnosticsCapabilityOptions): DiagnosticsCapability;
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