Infection PHP

@LaravelSprout @phpstan Did you check the logs? The number of E is suspucious. --log-verbosity=all --debug --logger-text=some-file

Adding @infection_php to the CI build, since @phpstan will kill a bunch of the mutants....or so I thought

Infection 0.34.0 is out! 🎉 It introduces a new feature for filtering source files to mutate and tests to run. Learn why it matters and how to use it: infection.github.io/guide/argument…

@roxblnfk See #dots-per-row" target="_blank" rel="nofollow noopener">infection.github.io/guide/command-…

Infection 0.33.0 has been released. - Testo test framework support (by @roxblnfk) - Allow using the full width of the terminal for console output Enjoy!

@localheinz yeah, this is the feedback we are looking for actually :) Makes sense. It will probably be not JSON, but anyway - another type of the output is indeed needed for AI

@infection_php How about detecting the presence of an AI agent and switching to JSON output on the console?

Do you use Infection with AI-generated code/tests? If so, what is the workflow / skills / prompts? Is there anything we need to improve here to make it more useful?

Lately I've been working on integrating #Testo #PHP with @infection_php There's still more ahead, but in the meantime you can read my fresh article about mutation testing php-testo.github.io/docs/theory/mu…

@sam_dark There is an open discussion about Psalm github.com/vimeo/psalm/di… But no work has been done yet. Psalm would be integrated a bit differently than Mago and PhpStan, thus was postponed

@infection_php Nice! How about Psalm?

Now officially: Infection supports killing mutants by Static Analysis tools: - PHPStan - Mago infection.github.io/guide/static-a… Enjoy!

@devnzian Both work as the same Static Analysis tool, so inyergangeable. What Mago brings in context of Mutatuon Testing is speed, it's very fast.

@infection_php Love this! Does Mago bring anything unique compared to PHPStan in this context, or are they mostly interchangeable for mutant killing?

@vinceAmstoutz Great to know! Thank you.

@infection_php I use it in a project and it's a killer feature! 🚀

@OskarStark 👀

Hot take: 100% code coverage is a vanity metric. 📊 I'd rather have 60% coverage of critical paths than 100% coverage of getters, setters etc. Agree or disagree? 🤔

@mattpocockuk There is a native Claude Chrome plugin now code.claude.com/docs/en/chrome

Frontend is WAY harder for AI than backend. That's because it's flying blind. It can't test the code in the environment where it's running - the browser. Here's how to hook up AI to your browser:

Infection 0.32.3 has been released with new `--max-timeouts` and `--with-timeouts` options. Read the details in this blog post to understand how it helps with speeding up Mutation Testing and why you should start using them! infection.github.io/2026/01/14/wha… Thanks @sanmai!

🎄 Xmas present Infection 0.32.0 has been released: - Format-presering pretty printing - new GitHub loggers with collapsable sections - Symfony 8 support; webmozart/assert@v2 support - and much more github.com/infection/infe…

Looks like #phpunit xml code-coverage generation could get nearly twice as fast in the future. this would for example considerably reduce overhead of the necessary "initial-test" step when running @infection_php on your project.

How to write custom mutators: infection.github.io/guide/custom-m…

.@phpstan has added @infection_php for PRs on GH Actions with a set of custom rules 🚀 github.com/phpstan/phpsta…

.@xepozz started working on Infection Plugin for @phpstorm, please share your ideas here: github.com/infection/infe… - What would you like to see? - How would you use it? - Where would you want to see Mutants diffs? Let's make it useful.