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docs(convert): note how __main__ guards are rewritten #10286

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docs(convert): note how __main__ guards are rewritten #10286

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9 changes: 9 additions & 0 deletions docs/guides/coming_from/jupyter.md
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Expand Up @@ -161,6 +161,15 @@ This supports:
- **py:percent format**: If your script uses `# %%` cell markers, marimo will convert it to a multi-cell notebook (requires jupytext)
- **Regular Python scripts**: Scripts without cell markers are converted to a single-cell notebook

!!! note "`if __name__ == \"__main__\":` guards"

For plain (non-percent) scripts, marimo rewrites a **top-level**
`if __name__ == "__main__":` block into a `_main_()` helper so the entry
point still runs under marimo's execution model. The conversion only
rewrites a real statement-level guard — mentions of that text inside
string literals or comments are left alone. Guards with an `else:` branch
are not rewritten.

For py:percent conversion with uv:

```bash
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