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Simon Willison Published a Standalone Reference Site for ChatGPT Work's Tool and Skill Surface
Alongside the analysis post, Willison put the extracted ChatGPT Work tool and skill definitions up as a browsable static site at codex-tool-reference.simonw.chatgpt.site, which drew 226 points and 55 comments on its own HN submission. It is the artifact rather than the argument: the actual specifications for the 223 tools and 44 skills, covering document creation, PDF handling, spreadsheet manipulation and dashboard building, in a form you can grep. His stated position is that vendors should publish system prompts and tool specs themselves rather than leaving users to reconstruct them.
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