Developer releases lightweight AI agent library with pause, resume, and human approval

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A developer has published yieldagent, an open-source JavaScript library for building AI agents in roughly 200 lines of code with no external dependencies. The library implements a standard agent loop — sending messages to a model, executing tool calls, and repeating until a final answer is returned. A key feature is human-in-the-loop support, allowing specific tool calls to be paused for approval before execution, with resumable state that can be serialized and stored. The library is provider-agnostic, supporting any OpenAI-compatible API including Ollama, and offers optional Zod-based tool validation and streaming support. The project is available on npm and GitHub, with a browser-based demo that requires no API key.

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