Cosmic Ray

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library 8.4.6 ·python
verified Apr 27, 2026

Cosmic Ray is a mutation testing tool for Python. It runs tests against mutated versions of your code to assess test suite quality. Current version 8.4.6. Release cadence is irregular with several minor releases per year.

total hits 28
actors 9 distinct systems
last hit 2d ago Amazonbot
ByteDance
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Amazonbot
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MetaBot
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GPTBot
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Script
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Search engines
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Humans
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