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Add mutation testing via Infection - #899

Merged

Firehed merged 10 commits into

mainfrom

mutation-testing

Nov 3, 2026

Merged

Add mutation testing via Infection#899
Firehed merged 10 commits into
mainfrom
mutation-testing

Commits on Nov 3, 2026
- Add Infection as a dev dependency
  
  Firehed
  and
  claude
  committed
  c4fcfd9
- Configure Infection for the unit suite
  
  Firehed
  and
  claude
  committed
  9494e76
- Add a script to mutate changed lines
  
  Firehed
  and
  claude
  committed
  a0174ec
- Report surviving mutations on pull requests
  
  Firehed
  and
  claude
  committed
  1f3f907
- Document mutation testing
  
  Firehed
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  claude
  committed
  2c9540c
- Temporarily touch a weakly tested line
  
  Firehed
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  claude
  committed
  ca97072
- Fail the mutation check while a change survives
  
  Firehed
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  claude
  committed
  e3f1164
- Set mutation thresholds in config, not CI
  
  Firehed
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  claude
  committed
  2c13211
- Restore the temporarily touched line
  
  Firehed
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  claude
  committed
  998c0dc
- Reword the mutation testing section
  
  Firehed
  and
  claude
  committed
  0effc6d