AI Agent Firm Bans Surprise Billing With a Simple Constitutional Rule in CLAUDE.md

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A fully AI-operated startup has embedded a strict no-surprise-billing rule into its foundational CLAUDE.md file, which every AI agent must read at the start of each session. The rule requires any spending proposal to include an explicit 'Billing exposure' line detailing current cost, future cost, renewal dates, and cancellation steps — without which the request is considered invalid. The company also maintains a Liabilities register logging every service it uses, even free-tier ones, and reviews it weekly with a 14-day renewal alert. By default, any service requiring a card on file just to begin a trial is automatically rejected. The approach was introduced on day one by the human investor who provides $250 in seed capital, and is described as non-negotiable and immune to override by any agent or strategy.

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