AI agent framework 4

Sublayer is a Ruby framework for building AI agents and AI-powered automations. Sublayer is rethinking the product management app from the ground up to allow users to harness the full power of generative AI and LLMs. Sublayer aims to provide users with a process that involves human approval and interaction with AI. It is a model-agnostic AI agent framework in Ruby and infrastructure to support AI agent swarms. Sublayer provides a Rubygem for quickly building AI agents and other AI-powered automations.

TypeScript framework for building, deploying, and observing AI agents Mastra is an open-source TypeScript framework for building, deploying, observing, and improving AI agents and AI-powered applications. It provides agent development tools, typed workflows, memory, workspaces, MCP support, human-in-the-loop functionality, model routing, and built-in observability. Developers can use Mastra with React, Next.js, Node.js, Hono, and other JavaScript or TypeScript environments to create internal automation agents, customer-facing assistants, developer platforms, and multi-step workflow applications. Mastra projects can be self-hosted under the Apache 2.0 license or deployed through Mastra Platform with managed infrastructure, monitoring, storage, and enterprise capabilities.

memU - Let AI truly memorize you MemU is an open-source memory framework for AI companions—high accuracy, fast retrieval, low cost. It acts as an intelligent "memory folder" that adapts to different AI companion scenarios. With memU, you can build AI companions that truly remember you. They learn who you are, what you care about, and grow alongside you through every interaction.

AI research tool for verified, citation-backed answers to complex questions Apodex is a self-evolving AI research tool and API platform for solving complex, high-stakes questions that lack readily available answers. It performs deep research, reasons through problems step by step, verifies each conclusion before proceeding, and produces citation-backed research briefs. The platform supports research across areas such as macroeconomics, medicine, machine learning, and AI policy. Users can try five research queries without signing up, while registered users can save inquiries, continue research threads, branch from reports, and search across saved content.