/**
 * Registry of Vercel AI SDK providers. Each entry maps a vendor slug to the
 * dynamic import spec, factory function, default model, and env var name.
 *
 * VercelAgentRunner uses this to resolve and construct the right provider
 * instance at runtime. All packages are optionalDependencies — missing
 * packages produce a clear actionable error instead of a crash.
 */
export interface VercelProviderDef {
    vendor: string;
    /** npm import specifier for dynamic import(). */
    package: string;
    /** Factory function exported by the package (e.g. createOpenAI). */
    factory: string;
    /** Sane default model when role doesn't pin one. */
    defaultModel: string;
    /** Default API key env var name. */
    envVar: string;
    /** Override base URL (e.g. GLM's z.ai endpoint). */
    defaultBaseUrl?: string;
    /** If true, use @ai-sdk/openai with custom baseURL (Chat Completions API). */
    isOpenAiCompatible?: boolean;
}
export declare const VERCEL_PROVIDERS: Record<string, VercelProviderDef>;
/** Resolve a provider instance via dynamic import. Throws clear error if
 *  the package is missing (optionalDependencies pattern — mirrors how
 *  opencode-runner and kimicode-runner handle missing SDK packages). */
export declare function loadVercelProvider(def: VercelProviderDef, apiKey?: string, baseUrl?: string): Promise<(modelId: string) => any>;
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