/**
 * CortexModel: branded opaque type for type-safe model passing.
 *
 * Wraps pi-ai's Model<any> with a branded type to prevent consumers
 * from accidentally passing raw pi-ai models where cortex models
 * are expected (and vice versa).
 *
 * The consumer can read provider, modelId, and contextWindow for
 * display and configuration. The underlying pi-ai Model object is
 * accessed internally by CortexAgent when constructing the
 * pi-agent-core Agent.
 *
 * Reference: provider-manager.md
 */
/**
 * Opaque model handle. The consumer receives this from ProviderManager
 * and passes it to CortexAgent. The consumer never inspects its internals
 * beyond the declared fields.
 *
 * Internally, this wraps pi-ai's Model<T> type.
 */
export interface CortexModel {
    /** @internal Brand tag for nominal type safety. */
    readonly __brand: 'CortexModel';
    /** Provider identifier (e.g., 'anthropic', 'openai', 'google'). */
    readonly provider: string;
    /** Model identifier (e.g., 'claude-sonnet-4-20250514'). */
    readonly modelId: string;
    /** Context window size in tokens. */
    readonly contextWindow: number;
}
/**
 * Wrap a pi-ai Model object into a CortexModel.
 *
 * @param model - The pi-ai Model object to wrap
 * @param provider - The provider identifier
 * @param modelId - The model identifier
 * @param contextWindow - The context window size (default: 200000)
 * @returns An opaque CortexModel handle
 */
export declare function wrapModel(model: unknown, provider: string, modelId: string, contextWindow?: number): CortexModel;
/**
 * Unwrap a CortexModel to retrieve the underlying pi-ai Model object.
 *
 * @param cortexModel - The CortexModel to unwrap
 * @returns The underlying pi-ai Model object
 * @throws Error if the object is not a valid CortexModel
 */
export declare function unwrapModel(cortexModel: CortexModel): unknown;
/**
 * Check whether a value is a valid CortexModel (has the correct brand
 * and contains a wrapped inner model).
 *
 * @param value - The value to check
 * @returns True if the value is a valid CortexModel
 */
export declare function isCortexModel(value: unknown): value is CortexModel;
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