René's URL Explorer Experiment

{"@context":"https://schema.org","@type":"DiscussionForumPosting","headline":"Explain the `assert_never` pattern better in agent skills","articleBody":"\u003e Please restore the old pattern\n\u003e \n\u003e ```\n\u003e  if default:\n\u003e     # Register the group - don't do this before adding the deps in case that step fails.\n\u003e     if backend is BackendEnum.uv:\n\u003e         register_default_group(group)\n\u003e     elif backend is BackendEnum.none:\n\u003e         # This is not really a meaningful concept without a package manager\n\u003e         pass\n\u003e     else:\n\u003e         assert_never(backend)\n\u003e ```\n\u003e \n\u003e The rationale being that this makes it safer in case we add a new backend, that we don't silently fail to add support for it here. \n\n _Originally posted by @nathanjmcdougall in [#1589](https://github.com/usethis-python/usethis-python/pull/1589/changes#r3000160894)_\n\nWe should explain not to remove this pattern when it is encountered, give examples of good and bad; and explain why it's positively helpful for enums in general.","author":{"url":"https://github.com/nathanjmcdougall","@type":"Person","name":"nathanjmcdougall"},"datePublished":"2026-03-27T10:22:36.000Z","interactionStatistic":{"@type":"InteractionCounter","interactionType":"https://schema.org/CommentAction","userInteractionCount":0},"url":"https://github.com/1598/usethis-python/issues/1598"}