Functionary provides a declarative way to register custom tools — JavaScript functions encapsulating API calls, database queries, or business logic. It wraps an LLM interaction to analyze user prompts, determine which tools to execute, and parse the tool outputs back into conversational responses. The framework supports memory, error handling, and chaining of actions, offering hooks for pre- and post-processing. Developers can quickly spin up agents capable of dynamic function orchestration without boilerplate, enhancing control over AI-driven workflows.

LLM Functions提供一個簡單的框架，將大語言模型的回應與實際的程式執行連接。用戶通過JSON schema定義函數，將其註冊到庫中，並在合適時由LLM返回結構化的函數調用。庫會解析這些回應，驗證參數，並調用正確的處理程序。支持同步和異步回調、自定義錯誤處理及插件擴展，非常適合需要動態數據查詢、外部API調用或在AI驅動的對話中執行複雜商務邏輯的應用。