export declare function createObservabilityHandler(): import("h3").EventHandlerWithFetch<import("h3").EventHandlerRequest, Promise<import("./types.js").EvalResult[] | import("./types.js").ExperimentMetricResult[] | import("./types.js").FeedbackEntry[] | import("./types.js").SatisfactionScore[] | import("./types.js").TraceSummary[] | import("./types.js").Experiment | import("./actions/promote-trace-eval.js").PromoteTraceEvalResult | {
    total: number;
    thumbsUp: number;
    thumbsDown: number;
    categories: Record<string, number>;
} | {
    totalEvals: number;
    avgScore: number;
    byCriteria: Array<{
        criteria: string;
        avgScore: number;
        count: number;
    }>;
} | {
    items: import("./types.js").Experiment[];
    nextCursor: {
        createdAt: number;
        id: string;
    } | null;
    hasMore: boolean;
} | {
    totalRuns: number;
    totalCostCents: number;
    avgDurationMs: number;
    toolSuccessRate: number;
    avgFrustrationScore: number;
    thumbsUpRate: number;
    avgEvalScore: number;
} | {
    ok?: undefined;
    error: string;
    message: string;
    summary?: undefined;
    spans?: undefined;
} | {
    error?: undefined;
    ok?: undefined;
    message?: undefined;
    summary: import("./types.js").TraceSummary;
    spans: import("./types.js").TraceSpan[];
} | {
    error?: undefined;
    ok?: undefined;
    message?: undefined;
    summary?: undefined;
    spans?: undefined;
    traceMissing: true;
    id: string;
} | {
    error?: undefined;
    ok?: undefined;
    message?: undefined;
    summary?: undefined;
    spans?: undefined;
    traceMissing?: undefined;
    id: string;
} | {
    ok?: undefined;
    message?: undefined;
    summary?: undefined;
    spans?: undefined;
    error: any;
} | {
    error?: undefined;
    message?: undefined;
    summary?: undefined;
    spans?: undefined;
    ok: boolean;
}>>;