Is LoopCraft free to use?

Yes. LoopCraft offers a free tier for designing and exporting AI agent loop patterns. A Pro plan is available for advanced features.

What is Loop Engineering?

Loop Engineering is designing the control flow for AI agents: how they plan actions, observe results, and iterate. LoopCraft includes 11 pre-built patterns based on research from Anthropic, OpenAI, and others — including ReAct, Plan-Execute, Evaluator-Optimizer, Multi-Agent, and more. Design loops visually and export to LangGraph, OpenAI Agents SDK, AutoGen, or CrewAI.

Which frameworks can I export to?

LoopCraft exports to LangGraph (Python), OpenAI Agents SDK (TypeScript), AutoGen (Python), and CrewAI (Python). Each export produces working code you can run directly in your project.

Do I need to write code?

No. LoopCraft is a visual builder — you design loop patterns with a drag-and-drop interface and configure nodes without writing code. Code export to LangGraph, OpenAI SDK, AutoGen, and CrewAI is generated automatically and is optional.

What loop patterns are supported?

LoopCraft supports 11 agent loop patterns: ReAct (think-act-observe cycle), Prompt Chaining (sequential steps with quality gates), Routing (classify and direct inputs), Parallel Sectioning (independent subtasks in parallel), Parallel Voting (multiple runs for confidence), Orchestrator-Workers (dynamic task decomposition), Evaluator-Optimizer (generate-evaluate loop), Plan-and-Execute (plan then execute with replanning), ReWOO (variable passing between tasks), LLM Compiler (DAG-based parallel execution, 3.6x speedup), and Multi-Agent (collaborative agents with roles).

Design Failure Paths on the Canvas Before You Export the Loop

Most agent loop outages are not model mysteries; they are missing failure edges. Before you export from LoopCraft to LangGraph, AutoGen, CrewAI, or the OpenAI Agents SDK, draw what happens when a tool times out, returns an invalid schema, or should be skipped. Mark optional nodes, attach fallback branches, and set retry budgets you can explain to on-call in one sentence. Change one variable per test run. If every node is critical and every failure restarts the whole graph, you do not have a resilient loop—you have a brittle demo. Keep the canvas and the export in sync so the diagram you reviewed is the graph you ship. English, Chinese, and Japanese UI copy should describe the same failure vocabulary so multilingual teams mark the same boxes. LoopCraft: https://getloopcraft.com — sapsap@qq.com.