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JavaScript Execution Context in AI Apps: How LangChain JS and Cloudflare Workers Keep State Straight

Last Updated: September 3rd, 2026

When you build an AI application with LangChain JS on Cloudflare Workers, every chain invocation creates its own execution context in JavaScript—a fresh scope for variables, callbacks, and intermediate results. LangChain's state-management model layers on top of that runtime context, using Chain…