import type { CanonicalModelId } from "./canonical-model.js";
import type { RouteSkip } from "./plan.js";
import { type RoutePlanRequest, type RoutePlanResult } from "./planner.js";
import { type ProviderPolicy } from "./policy.js";
/**
 * Configuration-degradation wrapper around the harness planner.
 *
 * Policy: even when a provider has priority over the default (an explicit
 * `only` fence or an ordered policy naming it first), **missing keys or
 * configuration must never make inference unavailable** — the call degrades
 * to the default provider and the caller logs an error. This keeps
 * development environments that hold only an OpenRouter key fully working
 * while a checked-in policy prioritizes (say) Azure, and keeps production
 * serving through a provider-config regression instead of hard-failing.
 *
 * Scope: PLAN-TIME emptiness only — a stage with zero attemptable candidates
 * (transport unconfigured/invalid, no binding for the model, capability
 * mismatch). Runtime failures keep the fence semantics: a configured `only`
 * provider that errors at request time is never retried through another
 * provider; the executor's cross-provider traversal applies only
 * within the plan the policy allowed.
 */
export interface DegradedStage {
    readonly model: CanonicalModelId;
    /** The policy that produced an empty stage. */
    readonly fromPolicy: ProviderPolicy;
    /** Plan skips recorded for this model under the original policy. */
    readonly skips: readonly RouteSkip[];
}
export interface DegradedPlanResult extends RoutePlanResult {
    /** Stages rebuilt under the degraded default; empty when nothing degraded. */
    readonly degraded: readonly DegradedStage[];
}
export declare function buildRoutePlanWithConfigDegradation(request: RoutePlanRequest, degradedPolicy: ProviderPolicy): DegradedPlanResult;