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AI Frameworks

b4run

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Ridiculous speed. Readable code.

★ 31112 forksTypeScriptMITcacheplane

B4.run is a TypeScript meta-framework that wraps LangGraph.js with file-system routes, generated route/state/tool types, workspace sandboxing, approval gates, durable threads, and fixture-backed tests to emit runnable Node servers and Dockerfiles.

Use Cases

Build TypeScript AI agents on LangGraph.jsFile-system routed agents and workflowsGenerated route/state/tool types via typegenLocal deterministic fixture-based agent testingCode-fixer agent with isolated workspace editsResearch assistant agentChat and workspace assistantMemory-backed agent with persistenceApproval-gated tool executionDeploy agent apps to Node, Vercel, LangSmith, or Kubernetes

Built With

Language
TypeScript
Frameworks
LangGraph.js · LangChain · CopilotKit · AG-UI · Turbo · Vitest · Biome

Tags

agents · langgraph · langchain · typescript · file-system-routing · typegen · workflows · tools · durable-threads · sandbox-execution · approval-flows · dev-server · build-artifacts · nodejs