/**
 * Local Observability Configuration
 *
 * Provides a single toggle (SUPERBLOCKS_LOCAL_OBS=true) that auto-configures
 * all environment variables needed for local observability testing with the
 * LGTM stack (Loki, Grafana, Tempo, Mimir).
 *
 * This eliminates the need to manually set 8+ environment variables:
 * - SUPERBLOCKS_DEPLOYMENT_TYPE
 * - SUPERBLOCKS_LLMOBS_ENABLED
 * - OTEL_EXPORTER_OTLP_ENDPOINT
 * - DD_LLMOBS_ENABLED
 * - DD_LLMOBS_ML_APP
 * - DD_LLMOBS_AGENTLESS_ENABLED
 * - DD_SITE
 * - DD_API_KEY
 *
 * Usage:
 *   SUPERBLOCKS_LOCAL_OBS=true pnpm start:all
 *
 * Or with custom OTEL endpoint:
 *   SUPERBLOCKS_LOCAL_OBS=true OTEL_EXPORTER_OTLP_ENDPOINT=http://localhost:4318 pnpm start:all
 *
 * Note: this mode changes export POLICY (sampling, log levels, LLMObs), not the
 * dev-server's OTLP endpoint. The dev-server always exports through the
 * Superblocks server proxy at <SUPERBLOCKS_BASE_URL>/api, so with an auth file
 * pointing at a remote instance, a standalone `SUPERBLOCKS_LOCAL_OBS=true
 * superblocks dev` sends its telemetry to that instance, not to the local
 * collector. Run against a local stack to keep telemetry local.
 */
/**
 * Checks if local observability mode is enabled.
 *
 * Returns true if:
 * - SUPERBLOCKS_LOCAL_OBS=true (primary toggle)
 * - OR all required env vars are manually configured (legacy mode)
 */
export declare function isLocalObsEnabled(): boolean;
/**
 * Applies local observability configuration to process.env.
 *
 * This ensures that all downstream code that reads env vars directly
 * (like dd-trace auto-initialization) gets the correct values.
 *
 * Should be called early in the application lifecycle, before any
 * telemetry initialization occurs.
 */
export declare function applyLocalObsEnvVars(): void;
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