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# Introduction
If you want to learn agent engineering by doing instead of just reading about it, the best way is still to fork real repos, run them locally, and change them for your own use. This is where the real learning happens. I’ve hand-picked the best 10 ones, the projects that are both useful and widely recognized, so you can see how agent apps are being built today. So, let’s get started.
# 1. OpenClaw
OpenClaw (~343k ⭐) is the one I would point to first if you want to see what the next wave of personal AI assistants might look like. It is built as a personal assistant that runs on your own devices and connects to the tools people already use, like WhatsApp, Telegram, Slack, Discord, Signal, and iMessage. What makes it interesting is that it is not just a simple chat demo. It feels like a real assistant product, with multi-channel support, voice features, and a broader ecosystem around skills and control. If you want a repo that feels close to a real agent system, this is a strong place to start.
# 2. OpenHands
OpenHands (~70k ⭐) is a great repo to fork if your main interest is coding agents. It is built around AI-driven development and now has a wider ecosystem around it, including cloud, docs, CLI, SDK, benchmarking, and integrations. That matters because you are not just looking at one demo. You can study the core agent, check the interface, and also see how the team thinks about evaluation and deployment. If you want to build or customize a coding assistant, this is one of the most practical repos to learn from.
# 3. browser-use
browser-use (~85k ⭐) is one of the most useful projects if you want agents that can actually do things on the web. The idea is simple: it makes websites easier for AI agents to use, so they can handle browser-based tasks with less friction. That makes it easy to experiment with, since a lot of real agent work ends up in the browser anyway — form filling, research, navigation, and repetitive online tasks. It also has supporting repos and examples, which makes it easier to go from curiosity to something you can test in a real workflow.
# 4. DeerFlow
DeerFlow (~55k ⭐) is one of the more interesting projects if you want to understand long-horizon agent systems. It is an open-source super-agent harness that brings together sub-agents, memory, sandboxes, skills, and tools to research, code, and create across longer tasks. So, it is not just wrapping tool calls. It is trying to manage the full structure around more complex agent behavior. If you want to see how modern agent systems are being built around memory, coordination, and extensibility, this is a very useful repo to fork.
# 5. CrewAI
CrewAI (~48k ⭐) is still one of the easiest repos to understand if you want multi-agent orchestration without too much complexity. It is a fast, flexible framework for multi-agent automation, and it is built independently rather than on top of LangChain. The mental model is simple, the setup is approachable, and the docs and examples are friendly enough for beginners. If you want a Python-first repo that you can fork and turn into something useful, CrewAI still deserves a spot near the top.
# 6. LangGraph
LangGraph (~28k ⭐) is the repo to study when you want to understand the engineering side of agents, not just the flashy demo side. LangChain describes it as a low-level orchestration framework for long-running, stateful, controllable agents. It pushes you to think in terms of graphs, state, control flow, and resilience. It is especially useful if you want to move beyond simple prompt-plus-tool-call systems and understand how more serious agent runtimes are put together. It may not feel as quick to pick up as some other repos, but it teaches a lot.
# 7. OpenAI Agents SDK
The OpenAI Agents SDK (~20k ⭐) is a good option if you want something lightweight but still modern. It is built as a compact framework for multi-agent workflows, and the docs present it as a production-ready path with a small set of useful building blocks. You get tools, handoffs, sessions, tracing, and realtime patterns without having to wade through a huge framework. If you like simple surfaces and direct control, this is one of the better starter repos to explore.
# 8. AutoGen
AutoGen (~56k ⭐) is still one of the most important repos in the multi-agent space. Microsoft frames it as a programming framework for agentic AI, and the docs go further into business workflows, research collaboration, and distributed multi-agent applications. It belongs in this kind of list because there is a lot to learn from it. The orchestration ideas, agent conversation patterns, and framework design are all worth studying. It may not be the simplest starting point for everyone, but it is still one of the most influential projects in the category.
# 9. GPT Researcher (~26k ⭐)
GPT Researcher is a great choice if you want to study a deep-research agent instead of a general framework. It is an autonomous agent for deep research using any large language model (LLM) provider, and its surrounding material shows how it handles multi-agent research and report generation. This gives you one clear workflow to study from start to finish. You can see planning, browsing, source gathering, synthesis, and reporting all in one place. If you want something concrete rather than abstract, this is one of the most forkable repos on the list.
# 10. Letta
Letta (~22k ⭐) stands out because it puts memory and state at the center of the agent design. The repo describes it as a platform for building stateful agents with advanced memory that can learn and improve over time. This is an important angle because a lot of agent repos focus mostly on orchestration. Letta widens the picture. It is a good repo to explore if you want agents that persist, remember, and evolve instead of starting fresh every time. For memory-focused agent work, it is one of the more interesting projects to fork today.
# Wrapping Up
All ten are worth cloning, but they teach different things once you actually run them and start changing the code. That is where the real learning begins.
Kanwal Mehreen is a machine learning engineer and a technical writer with a profound passion for data science and the intersection of AI with medicine. She co-authored the ebook “Maximizing Productivity with ChatGPT”. As a Google Generation Scholar 2022 for APAC, she champions diversity and academic excellence. She’s also recognized as a Teradata Diversity in Tech Scholar, Mitacs Globalink Research Scholar, and Harvard WeCode Scholar. Kanwal is an ardent advocate for change, having founded FEMCodes to empower women in STEM fields.
