I Built an AI Agent That Can Write Its Own Tools When It Gets Stuck

Most AI agents are only as capable as the tool list they shipped with. They can browse, click, read files, maybe run some shell commands, maybe call a few prebuilt functions. But once they hit a task their built-in actions don’t cover, they usually stall out. At that point, you either have to add the missing functionality yourself, wire in some external skill system, or accept that the agent has reached the edge of its world. That always felt like a major limitation to me.