v9.6.1

9.6.1 (2026-04-10)

Bug Fixes

• deps: update dependency typed-rest-client to ~2.3.0 (#5933) (5a24298)
• deps: update mutation-testing-elements monorepo to v3.7.3 (#5912) (1f68437)
• vitest-runner: fix vitest runner mutant hitcount and coverage for v4.1 (#5928) (56c1ae2)

v9.6.0

9.6.0 (2026-02-27)

Bug Fixes

• deps: update babel monorepo (#5781) (22d71cf)
• deps: update dependency ajv to v8.18.0 [security] (#5830) (a06e99b)
• deps: update dependency minimatch to v10.2.3 [security] (#5836) (6398fda)
• deps: update mutation-testing-elements monorepo to v3.7.2 (#5826) (d471647)
• string-literal-mutator: exclude dynamic import call expressions from mutation (#5819) (06758ba)

Features

• cli: allow percentage-based concurrency configuration (e.g., "50%") (#5818) (6e5e76f)

v9.5.1

9.5.1 (2026-02-02)

Bug Fixes

• deps: update dependency angular-html-parser to ~10.3.0 (#5723) (4d33b96)
• deps: update dependency angular-html-parser to ~10.4.0 (#5738) (3e49329)
• deps: update dependency typed-rest-client to ~2.2.0 (#5720) (33a0eb0)
• deps: update mutation-testing-elements monorepo to v3.7.1 (#5631) (07a1171)
• vitest-runner: fix ebusy warning on windows when concurrency >=2 (#5671) (25a6d48), closes #5670
• vitest-runner: support Vitest fixtures (test.extend) (#5721) (d8ac0e9), closes #5459
• vitest: resolve dual instance problem with Vitest plugins (#5745) (c0169e8)

Features

• add --testFiles option to limit which tests are executing (#5713) (6a96659)
• instrumenter: ignore mutations of the signal query options object (#5767) (32b9e81), closes #5729

v9.4.0

9.4.0 (2025-11-23)

Bug Fixes

• deps: update dependency @inquirer/prompts to v8 (#5609) (c706aed)
• deps: update dependency angular-html-parser to ~10.1.0 (#5630) (2233f00)
• deps: update dependency glob to v10.5.0 [security] (#5613) (d59cbd5)
• deps: update dependency glob to v13 (#5633) (fe2f1b1)
• deps: update dependency mutation-server-protocol to ~0.4.0 (#5587) (f1650b3)
• vitest-runner: detect suite-level failures when test is skipped (#5588) (2b7e98d)

Features

• vitest: support vitest v4 (#5360) (3ba417d)

v9.3.0

9.3.0 (2025-10-28)

Bug Fixes

• deps: update babel monorepo to v7.28.5 (#5493) (e66a4f3)
• init: stryker init process should complete (#5510) (b4974e6)
• server: pass config file path to prepareExecutor during discovery (#5513) (6b77a5c)

Features

• init: ensure @stryker-mutator/core is installed by npm init stryker (37ed82c), closes #5505
• server: support stdio transport channel (#5520) (43a4123)

v9.2.0

9.2.0 (2025-10-04)

Features

• server: do not overwrite mutate config with params (#5498) (a1519a6)

v9.1.1

9.1.1 (2025-08-30)

Bug Fixes

• server: pass options to server (#5482) (cfbc11f), closes #5481

v9.1.0

9.1.0 (2025-08-30)

Bug Fixes

• child-process: fix OOM detection on apple silicon (#5463) (d872096)
• deps: update babel monorepo (#5415) (34cff8e)
• deps: update dependency angular-html-parser to ~9.2.0 (#5346) (ff6897f)
• deps: update dependency commander to v14 (#5318) (c5ed07b)
• deps: update dependency execa to v9.6.0 (#5337) (dac62e6)
• deps: update dependency minimatch to v10.0.3 (#5399) (2c85ca6)
• deps: update dependency mutation-testing-elements to v3.5.3 (#5343) (4fc697f)
• project-reader: fix issue where a file isn't set to be mutated (#5377) (c556b68)
• vitest: race condition in init (#5380) (949a93f)

Features

• core: implement the mutation server protocol (MSP) (#5086) (6ab231d)
• vitest: support vitest related (#5466) (42767af)

v9.0.1

9.0.1 (2025-05-14)

Bug Fixes

• vitest: copy stryker setup locally to support browser mode (#5306) (309eb5b)

v9.0.0

9.0.0 (2025-05-13)

Bug Fixes

• deps: update babel monorepo (#5053) (64b348e)
• deps: update dependency @cucumber/messages to v27 (#5212) (69a9b55)
• deps: update dependency @inquirer/prompts to v7 (#5059) (0d23fd1)
• deps: update dependency angular-html-parser to v8 (#5214) (68e6fc4)
• deps: update dependency angular-html-parser to v9 (#5254) (a163d00)
• deps: update dependency chalk to ~5.4.0 (#5183) (c1f9286)
• deps: update dependency commander to v13 (#5228) (3604746)
• deps: update dependency execa to v9.5.2 (#5137) (2ef28b8)
• deps: update dependency mutation-testing-elements to v3.5.2 (#5285) (5a878d7)
• deps: update dependency semver to ~7.7.0 (#5184) (5c78a65)
• deps: update dependency tslib to v2.8.1 (#5075) (f069348)
• deps: update dependency typed-inject to v5 (#5239) (42eb160)
• deps: update mutation-testing-elements monorepo to v3.5.1 (#5198) (dca35d4)
• instrumenter: Allow script tags with type "module" to be mutated (#5230) (c301e27)
• vitest-runner: Ensure no test failure screenshots from Vitest (#5243) (20f8d1b)

Features

• node: drop support for node 18 (#5290) (307ef79)
• svelte: support svelte to v5 (#5089) (fc8ddf3)
• tap: provide --test-reporter=tap as default nodeArg (#5302) (228fb81)
• vitest-runner: support vitest 3 browser mode (6f4c1f0)

BREAKING CHANGES

• node: Node 18 is no longer supported, please use Node 20 or higher
• vitest-runner: vitest runner now supports vitest v2 or higher