Sarah Poole, ex-lawyer and tech founder, in a navy-blue pantsuit and neat blonde hair, has just spent her morning with the artificial intelligence law plugin that triggered a global share market sell-off this week.

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She’s run a batch of tests on the new tool, which was launched by AI giant Anthropic last Friday and has inflicted special terror on legaltech, the companies that made it big with niche platforms for tech-optimised lawyering.