/**
 * @fileoverview Health snapshot utility to surface observability/runtime readiness.
 * This avoids heavy checks and focuses on quick signals for status endpoints or logs.
 * @module src/utils/internal/health
 */
/**
 * A point-in-time snapshot of server health signals.
 * Intentionally lightweight — all fields are derived from already-initialized
 * singletons and involve no I/O, so this is safe to call at any time.
 */
export interface HealthSnapshot {
    /** Core application identity pulled from the active config. */
    app: {
        /** Server name (from `MCP_SERVER_NAME` or `package.json`). */
        name: string;
        /** Server version string (from `MCP_SERVER_VERSION` or `package.json`). */
        version: string;
        /** Deployment environment (e.g. `'development'`, `'production'`). */
        environment: string;
    };
    /** Logger initialization state. */
    logging: {
        /** True when the logger has been fully initialized and is ready to emit records. */
        initialized: boolean;
    };
    /** Runtime environment classification from {@link runtimeCaps}. */
    runtime: {
        /** True when running under Node.js or Bun. */
        isNode: boolean;
        /** True when running inside a Web Worker or Cloudflare Worker. */
        isWorkerLike: boolean;
        /** True when running in a browser main thread. */
        isBrowserLike: boolean;
    };
    /** OpenTelemetry configuration state. */
    telemetry: {
        /** True when OpenTelemetry export is enabled (`OTEL_ENABLED=true`). */
        enabled: boolean;
        /** The OTel diagnostic log level, or `undefined` if not configured. */
        diagLevel: string | undefined;
    };
}
/**
 * Returns a lightweight, synchronous health snapshot of the running server.
 *
 * Aggregates app identity, runtime environment flags, logger state, and
 * OpenTelemetry configuration into a single object. Suitable for `/healthz`
 * endpoints, startup log lines, or diagnostic tooling.
 *
 * No I/O is performed — all data comes from already-initialized module singletons.
 *
 * @returns A {@link HealthSnapshot} reflecting current server state.
 * @example
 * ```typescript
 * const health = getHealthSnapshot();
 * logger.info('Server health', health);
 * ```
 */
export declare function getHealthSnapshot(): HealthSnapshot;
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