/**
 * PostHog configuration.
 *
 * Environment variables (read at runtime):
 *   AGENT_RELAY_POSTHOG_KEY - PostHog write key. Set by published-artifact
 *                              builds via GitHub Actions secret. When unset,
 *                              telemetry runs as a no-op so forks, local dev,
 *                              and CI test runs don't pollute the production
 *                              project.
 *   POSTHOG_API_KEY         - Per-process override (mainly for local
 *                              debugging or staging). Wins over
 *                              `AGENT_RELAY_POSTHOG_KEY` when set.
 *   POSTHOG_HOST            - Override host URL. Defaults to the hosted
 *                              Agent Relay ingestion proxy.
 *
 * Key selection order:
 *   1. POSTHOG_API_KEY (process override, any environment)
 *   2. AGENT_RELAY_POSTHOG_KEY (release-time injection)
 *   3. None → returns `null` and `initTelemetry()` becomes a no-op.
 */
export declare function getPostHogConfig(): {
    apiKey: string;
    host: string;
} | null;
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