Sustainability
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A Claude Code Skill That Builds, Researches and Stress Tests Business Models
I wrote two Claude Code skills that build, research and stress test business models, published them under an MIT licence, and pointed them at a project I ran myself. In 2021 I worked with the Government of Seychelles on ReNeT, a circular economy project for the industrial tuna fleet’s end-of-life fishing nets. The system design…
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VSME Reporting for SMEs: An AI Workflow for the Voluntary Standard
The 2026 Omnibus rollback narrowed mandatory CSRD reporting to the largest companies, those over 1,000 employees and €450 million turnover. It did not remove sustainability data from the economy. It pushed the request one step down the value chain. The large companies still in scope, and the banks that lend to everyone, still need supplier…
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Is ChatGPT Sustainable? OpenAI’s Environmental Report Card
I use ChatGPT most days, alongside Claude and the other frontier tools, and I write about using these models for sustainability research. None of that answers the question a client, a peer, or a sustainability event keeps putting to me. Is ChatGPT sustainable? Is OpenAI sustainable as a company? Can I credibly advise a client…
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Designing a Claude Workflow for CSRD Compliance
A multi-stage Claude workflow for CSRD that survives limited assurance. Architecture, failure modes, and a skill design.
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Is Claude Sustainable? What Anthropic Discloses, What It Doesn’t, and Why It Matters
Anthropic publishes no environmental report. Per-query, Claude is most efficient. The Colossus deal makes the picture worse.
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Why Sustainability Tasks Use 3-9x Less AI Than Equivalent Work
The gap widens where values and judgment matter most. Cognitive analysis of Claude usage data filtered by sustainability.