npm / @stryker-mutator/core
@stryker-mutator/core
What changed in @stryker-mutator/core 9 to 10, from its official release notes, upgrade guides and advisories. Sources checked 2026-10-19.
1 breaking4 new APIs and options1 behavior and defaults2 tooling2 fixes and other
See which of these apply to your code, ranked, in your agent:
npx @unstale/cli init@stryker-mutator/core 104 changes
Breaking changes 1
Node.js 20 is no longer supported; Node.js 22 or higher is required.
New APIs and options 1
Adds the empty-expression mutator.
Behavior and default changes 1
A partial incremental report is saved when the process exits unexpectedly.
Tooling 1
Babel was updated to major version 8, which may affect projects using the Babel integration.
@stryker-mutator/core 96 changes
New APIs and options 3
Concurrency configuration can now use percentages, such as "50%".
Limits which tests are executing.
The server supports a stdio transport channel.
Tooling 1
The init command ensures that @stryker-mutator/core is installed.
Fixes and other changes 2
The stryker init process should complete.
During discovery, the server passes the config file path to prepareExecutor.