fix: map mace imports to mace-torch

[alchem0x2A]

📝 Summary

Closes #10585

marimo currently infers the missing mace import as the unrelated PyPI package mace. The mace namespace used by mace.calculators is provided by mace-torch.

This PR adds the mace → mace-torch package mapping and tests both the forward and reverse mappings.

📋 Pre-Review Checklist

• For large changes, or changes that affect the public API: this change was discussed or approved through issue Question for maintaining the module_name_to_pypi_name.py #10585.
• Any AI generated code has been reviewed line-by-line by the human PR author, who stands by it.
• Video or media evidence is provided for any visual changes (not applicable; no visual changes).

✅ Merge Checklist

• I have read the contributor guidelines.
• Documentation has been updated where applicable, including docstrings for API changes (not applicable; no API or documentation changes).
• Tests have been added for the changes made.

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Project	Deployment	Actions	Updated (UTC)
marimo-docs	Ready	Preview	Aug 20, 2026 12:06am

[github-actions]

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[Copilot]

Pull request overview

This PR fixes dependency inference for the mace import namespace by mapping it to the correct PyPI distribution (mace-torch) instead of the unrelated mace package. This improves the accuracy of marimo’s “missing import → installable package” resolution, including when writing PEP 723 script metadata.

Changes:

• Add "mace": "mace-torch" to the module→PyPI package mapping registry.
• Add unit tests covering both module→package and package→module resolution for the new mapping.

Reviewed changes

Copilot reviewed 2 out of 2 changed files in this pull request and generated no comments.

File	Description
marimo/_runtime/packages/module_name_to_pypi_name.py	Adds the mace → mace-torch mapping entry used by canonicalization logic.
tests/_runtime/packages/test_pypi_package_manager.py	Extends existing mapping tests to validate forward and reverse resolution for mace-torch.

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[akshayka]

Thanks @alchem0x2A. Can you add a comment with

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

to sign the CLA?

[alchem0x2A]

thx @akshayka I have read the CLA. cheers

[dmadisetti]

I don't think we need the test- but thank you!

[alchem0x2A]

Thx! Was just testing the CI. Indeed can revert to the minimal tests marimo currently has

[alchem0x2A]

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