Vercel Open-Sources durable-harness for Crash-Proof Coding Agents

Vercel has open-sourced durable-harness, a framework designed to make coding agents resilient to crashes, interruptions, and process failures during long-running agentic tasks. The core problem it solves is that coding agents executing multi-step workflows—editing files, running tests, calling tools—are highly vulnerable to state loss if the underlying process crashes partway through. durable-harness provides checkpointing and resumption primitives so an agent can recover from failure without restarting its entire task from scratch. For developers building or operating coding agents in production, this is a practical reliability primitive that addresses a well-known pain point not covered by most agent frameworks. The open-source release means teams can audit, extend, and self-host the harness within their own infrastructure.