📄 中文摘要
Meta AI 的用户已超过十亿，作为一款免费的人工智能工具，嵌入在 Instagram、WhatsApp、Facebook 和 Messenger 中，并通过 Imagine 生成图像。然而，对于开发者和构建者而言，其结构性限制显而易见：缺乏持久记忆，无法在会话之间保持上下文；无法进行文档分析，无法处理 PDF、电子表格或代码文件；缺乏外部集成，无法与 Meta 生态系统外的任何内容互动；没有助手 API，尽管 Llama 模型可供自托管，但 Meta AI 助手本身没有 API 供工作流集成使用。这些限制使得 Meta AI 在开发者的技术栈中难以发挥更大的作用。
📄 English Summary
Meta AI Won't Fix Your Stack — A First-Principles Review
Meta AI has surpassed one billion monthly users, functioning as a free tool embedded in Instagram, WhatsApp, Facebook, and Messenger, and generating images through Imagine. However, its structural limitations are significant for developers and builders: it lacks persistent memory, meaning context does not carry over between sessions; it cannot perform document analysis, failing to process PDFs, spreadsheets, or code files; it has no external integrations, operating as a walled garden that cannot interact with anything outside Meta's ecosystem; and it lacks an assistant API, as the Llama models are available for self-hosting, but the Meta AI assistant itself does not provide an API for workflow integration. These limitations hinder Meta AI's potential utility in developers' tech stacks.