cloudflare-workers durable-objects llm-streaming agent-patterns infrastructure

Durable Objects stay alive during outbound connections

Durable Objects now remain alive for the duration of active outbound connections instead of being evicted after 70-140 seconds of inactivity, with a 15-minute per-connection ceiling.

July 1, 2026

Summary

LLM token streaming and long-running agent tasks no longer get cut off mid-stream when using outbound WebSocket or TCP connections. This eliminates a critical failure mode for AI agents that depend on sustained external connections.

Why it matters

Implementation verdict

Replaces workarounds that forced periodic pings or connection resets to prevent eviction. Requires no code changes for existing patterns—the behavior is automatic. Ready now; this is a deployed change as of June 19, 2026.

Sources

1.Durable Object would be evicted after 70-140 seconds of no incoming traffic, even if the object had an open outbound connection
2.each active outbound connection prevents eviction
3.Each outbound connection keeps the Durable Object alive for a maximum of 15 minutes

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