/**
 * Provider/model-family-aware context-window fallback.
 *
 * Used only when neither the live catalog (models.dev) nor the provider API
 * reports a context window for a model, e.g. a model newer than the models.dev
 * snapshot (the "brand-new gpt-5.5" case). A single flat default badly mis-sizes
 * the window and drives auto-compaction to fire far too early (small default) or
 * too late (large default, risking a provider "context length exceeded" error).
 * Infer a sane family default from the provider and model id instead.
 *
 * The real window always wins whenever the catalog / OpenRouter / provider_api
 * supplies one; this is the last line of defense, not a primary source.
 */
/** Last-resort default when neither provider nor model id is recognised. */
export declare const FALLBACK_CONTEXT_WINDOW = 128000;
/**
 * Best-effort context window (in tokens) inferred from provider + model id.
 *
 * Over-estimating is the dangerous direction (it risks context-overflow errors),
 * so only known-large families get a large window; older/unknown families stay at
 * the conservative {@link FALLBACK_CONTEXT_WINDOW}.
 */
export declare function inferFallbackContextWindow(provider: string, modelId?: string): number;
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