Coze Loop

Coze Loop is a platform-level solution for developing and operating AI agents, offering lifecycle management from development and debugging through evaluation to monitoring. Its open-source edition shares core technology modules from a commercial version so developers can customize and extend them.

A prompt-development module gives end-to-end support for writing, debugging, optimizing and versioning prompts through a visual Playground that compares output across different LLMs in real time. An evaluation module runs automated multi-dimensional tests of prompt and agent output, such as accuracy, conciseness and compliance, while an observability module records every stage from user input to AI output, including prompt parsing, model invocation and tool execution, and captures intermediate results and exceptions automatically.

It is written in Go and licensed under Apache-2.0.