The agent operating system arrives: LangChain's $3B bet and the week agents learned to pay

In one week, the agent stopped being a demo and became an operating system. LangChain raised $300 million at a $3 billion valuation to turn LangSmith into the platform that runs, improves and governs agents. OpenAI gave its always-on dots agents a wallet, so they can pay for things without ever seeing your card number. GitHub rebuilt Git storage so one repository can take 7,200 pushes a second from 5,000 agents at once. And AWS published a seven-layer blueprint for taking multi-agent systems from prototype to production. Four stories, one shape: the plumbing is now the product.