export declare function normalizeAgentEngineStatusModel(entry: {
    name: string;
    defaultModel: string;
    supportedModels: readonly string[];
} | undefined, model: string | null | undefined): string;
type AgentEngineStatusEntry = {
    name: string;
    defaultModel: string;
    supportedModels: readonly string[];
    requiredEnvVars: readonly string[];
};
export interface AgentEngineStatusResult {
    configured: boolean;
    engine?: string;
    model?: string;
    source?: "settings" | "env" | "app_secrets" | "app-default";
    selectionSource?: "configuration" | "app-default" | "shared-default" | "app_secrets" | "env";
    envVar?: string;
    openAiBaseUrlConfigured?: boolean;
}
export interface AgentEngineStatusResponse extends AgentEngineStatusResult {
    /** Fast chat setup snapshot; dispatch rechecks credentials before model use. */
    chatEligible: boolean;
    /** The deploy's Builder.io credits pair is set but this runtime refuses it. */
    builderCreditsRefused?: true;
}
export interface AgentEngineStatusDeps<E extends AgentEngineStatusEntry = AgentEngineStatusEntry> {
    readStoredEngine: () => Promise<{
        engine?: string;
        model?: string;
    } | null>;
    readAppDefault?: () => Promise<{
        engine: string;
        model: string;
    } | null>;
    readOpenAiBaseUrlConfigured: () => boolean | Promise<boolean>;
    isStoredEngineUsable: (stored: unknown, entry: E) => boolean | Promise<boolean>;
    detectFromUserSecrets: () => Promise<E | null>;
    detectFromEnv: () => E | null | Promise<E | null>;
    lookupEntry?: (engine: string) => E | undefined;
}
/**
 * Resolve "does this request have a usable AI provider" for one identity.
 *
 * Every call site pays for these lookups on a user-visible path (the agent
 * composer blocks on the status probe), so the two identity-independent reads
 * start together and the expensive `app_secrets` sweep only runs when the
 * cheaper sources have not already answered.
 */
export declare function resolveAgentEngineStatus<E extends AgentEngineStatusEntry>(deps: AgentEngineStatusDeps<E>): Promise<AgentEngineStatusResult>;
export {};