Broadcasting LLM token streams through Laravel Echo feels elegant right up until the moment it silently dies halfway through a response. No error. No terminal event. Just a client sitting there, waiting for tokens that will never arrive. We hit this in production during a multi-user document generation feature. The Pusher connection degraded during a particularly long Anthropic response. The queue job had no idea the client had disconnected, and the user stared at a spinner for three minutes before refreshing. The partial response was gone. No retry surface. No recovery path. The incident report had three action items and none of them were obvious beforehand. That experience shaped the * Laravel LLM streaming fail-safe * architecture this article covers. Every pattern below is oriented toward the specific failure modes that broadcasting-based LLM streams introduce, and in several cases those failure modes are different from what you encounter with SSE. One framing note before we start.…