Musk on the stand. LeCun staking a billion. And every adviser, founder and junior in Britain learning what happens when they hand theirs to a machine.

This week's issue opens in a federal courthouse in Oakland, where Elon Musk has spent seven hours under oath arguing that the men he funded broke a charitable trust to build the most valuable AI lab on earth. The most damaging evidence is not from Sam Altman. It is a notebook page from Greg Brockman that calls the nonprofit pledge a lie in plain English, written months after he had assured Musk it would hold. We walk through the Larry Page kitchen conversation that started OpenAI, the three-phase narrative that may sink Musk's own statute-of-limitations argument, and the moment William Savitt got Musk to admit, on the stand, that he had once told Tesla analysts he was building an enormous AI-enabled robot army.

We then turn to a Yorkshire negotiation last month, in which a senior professional handed an advisory board offer to a chatbot, asked for guidance, and lost the role inside twenty-four hours. The lesson, expanded from this week's Yorkshire Post column, is that AI is a multiplier. It amplifies expertise where there is a floor underneath. It exposes confusion where there is not. We offer five practical rules for using AI without becoming the person being quietly marked down.

We close with Yann LeCun and AMI Labs, the billion-dollar seed round built on the bet that the entire industry's foundational judgment has been wrong for five years. Plus the Week 19 layoff tracker, where Microsoft's first such programme in fifty-one years and Meta's eight thousand cuts pushed the year-to-date total past two hundred and seventy thousand.

Read the full issue, with charts and source notes, at thesundaysignal.ai.