The Agent Skills Directory

[EXTERNAL_DOWNLOADS]: The skill recommends installing @stryker-mutator/core and various test runner plugins (e.g., @stryker-mutator/jest-runner) via NPM. These are the official, well-known packages for the Stryker mutation testing framework.
[COMMAND_EXECUTION]: The skill uses standard development commands such as npm install, npx stryker init, and npx stryker run. These are intended for configuring and running the mutation testing tool within a developer environment.
[SAFE]: The external reference https://stryker-mutator.io is the official website for the Stryker project. All configuration examples and file paths (e.g., stryker.conf.json, .stryker-tmp/) are standard for this tool's operation.

stryker-mutation