Inherit cell type when creating new cells with Shift+Enter

[SamarJyoti496]

📝 Summary

When pressing Shift+Enter on a SQL cell, the new cell now inherits the SQL type instead of defaulting to Python. This maintains workflow momentum when chaining SQL queries.

Fixes #6790

🔍 Description of Changes

Problem: Shift+Enter on SQL cells created Python cells, breaking the flow.

Solution: Modified moveToNextCell in cells.ts to detect SQL cells and create new SQL cells with default boilerplate.

Changes:

• Added getNewCellCode() helper that checks cell type using LanguageAdapters.sql.isSupported()
• SQL cells create SQL cells; Python cells remain empty (unchanged behavior)
• Added two tests for SQL and Python cell behavior
• Before: SQL cell → Shift+Enter → Empty Python cell ❌
• After: SQL cell → Shift+Enter → SQL cell with mo.sql() ✅

📋 Checklist

• I have read the contributor guidelines.
• I have added tests for the changes made.
• I have run the code and verified that it works as expected.

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Project	Deployment	Preview	Comments	Updated (UTC)
marimo-docs	Ready	Preview	Comment	Oct 16, 2025 10:53pm

[github-actions]

All contributors have signed the CLA ✍️ ✅
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[SamarJyoti496]

I have read the CLA Document and I hereby sign the CLA

[Light2Dark]

hey @SamarJyoti496 , thanks for the contribution. We are internally discussing how to design this since it changes the default behaviour. Will come back to this in abit.

[SamarJyoti496]

hey @SamarJyoti496 , thanks for the contribution. We are internally discussing how to design this since it changes the default behaviour. Will come back to this in abit.

Thanks for the update! Sounds good, happy to wait for your feedback.