import type { LanguageModelV4GenerateResult } from "@ai-sdk/provider";
import type { HealthTransition } from "./health-store.js";
import type { ResolvedEntry } from "./stream.js";
import type { FailureClassification, OnRouterAttempt, RouterOrderingToken } from "./types.js";
/**
 * A candidate entry normalized to a single internal shape, regardless of which
 * of the three accepted `ProviderEntry` forms the user wrote.
 */
import { RouterModelState } from "./router-model-state.js";
export declare class RouterAttemptObservability extends RouterModelState {
    protected assertValidResult(result: LanguageModelV4GenerateResult): LanguageModelV4GenerateResult;
    protected emitAttempt(info: Omit<Parameters<OnRouterAttempt>[0], "entry" | "logicalId"> & {
        candidate: ResolvedEntry;
    }): void;
    protected emitSkipped(candidates: ResolvedEntry[], phase: "generate" | "stream-open", reason: "concurrency" | "cooldown" | "max-attempts"): void;
    protected markFailure(index: number, classification: FailureClassification, attemptStartedAt?: RouterOrderingToken): HealthTransition;
    protected markFailureIfEnabled(index: number, classification: FailureClassification, attemptStartedAt?: RouterOrderingToken): HealthTransition | undefined;
    protected markSuccess(index: number, attemptStartedAt?: RouterOrderingToken): HealthTransition | undefined;
    protected markSuccessIfEnabled(index: number, attemptStartedAt?: RouterOrderingToken): HealthTransition | undefined;
    protected becameUnavailable(index: number, selectedAt: RouterOrderingToken): boolean;
    protected nextOrderingToken(): RouterOrderingToken;
    protected isBudgetFailure(failure: FailureClassification): boolean;
    protected suppressesBudget(failure: FailureClassification): boolean;
    protected observeRequestFailure(eligible: boolean, suppressed: boolean): void;
}