Simon Willison uses <details> tags to collapse AI-generated PR descriptions
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On November 9, 2026, Simon Willison shared a low-cost tip on his blog: GitHub Markdown natively supports the <details><summary> HTML tags, which he uses to collapse verbose PR descriptions generated by models like Claude Code or Codex, keeping only a manually written high-level summary outside the collapsed block so reviewers can quickly grasp the key points. He also uses the collapsed heading to note the model and effort level used for generation, such as "Claude Opus 5.5 Medium", so others can tell at a glance which model and configuration produced the description.
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- Simon WillisonHide your slop PR descriptions behind <details><summary>
Simon Willison shares a low-cost trick: use the <details><summary> tags supported by GitHub Markdown to collapse verbose PR descriptions generated by Claude Code or Codex, keeping only a short human-written high-level note at the top, with the model name and effort level as the collapsible header (e.g. Claude Opus 5.5 Medium).
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