Many people want to create their own AI agents or coding agents, hoping to build an all-powerful programming robot. I've repeatedly stated that from the initial SWE Agent, to the sophisticated context management of the cursor era, to the early Claude Code, to various fancy memory mechanisms, to plan mode, and then to a main agent controlling several sub-agents and backend tasks, the technology of the agent itself has undergone three or four industrial revolutions in just two or three years. You can understand that the design of a coding agent tool alone has gone through several iterations on par with horse-drawn carriages, trains, cars, airplanes, and rockets. Today, I must tell everyone that creating an initial SWE Agent is necessary because it has educational value, just like anyone could create an operating system or compiler 10 years ago—it's part of a hands-on lesson. However, if you want to catch up with tools like CodeX, Gemini CLI, or Claude Code, you need to step into the code of these projects and see how complex their designs are. Even back in the days of Rookie Coder, Cline, and Aider, products that were top-tier open-source stars in Silicon Valley a year ago are now generations behind Codex and Claude Code, completely outdated. Not to mention the few large domestic companies with their three haphazardly designed coding agents, which are completely different from Claude Code and Codex – they're products of a completely different era. Even a half-generation gap is like a steam train versus a rocket, and the gap is visibly widening in the short term. I must warn you, Claude Code and Codex could very well become the next Chrome garbage. While garbage, they will objectively become the industry's de facto standard. The end result will be that all coding agents on the market will be three or four generations behind Claude Code, making them all shrink back to selling cheap APIs and manually configuring APIs within Claude Code. Claude Code will become the king of closed-source, and Codex the king of open-source, with the two sharing the market. Others can no longer understand all the engineering details of Codex and Claude Code, just like how you wouldn't understand all of Chromium's open-source code. I just want to tell you that after three years of iteration, the complexity of coding agents is now vastly different. Even companies of Alibaba's, ByteDance's, and the LLM Six Little Tigers' caliber are likely to be left far behind by their Silicon Valley counterparts—a gap they simply cannot bridge.