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chore(epub-codec): raise the mutation break threshold to 100 #1278

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Merged
Mearman merged 1 commit into from
Sep 15, 2026
Merged

chore(epub-codec): raise the mutation break threshold to 100 #1278

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4 changes: 2 additions & 2 deletions packages/epub-codec/stryker.config.ts
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Original file line number Diff line number Diff line change
Expand Up @@ -2,6 +2,6 @@ import { packageStrykerConfig } from "../../stryker.shared.ts";

export default packageStrykerConfig({
vitestConfigFile: "vitest.mutation.config.ts",
// First CI-measured baseline: 66.23% of 2150 valid mutants, timeout share 1.3% -- break = floor(score) minus the timeout share rounded up to whole points (minimum one), per the derivation rule on PackageStrykerOptions.breakThreshold.
breakThreshold: 64,
// Every mutant is genuinely killed by a real test, or the code it would have mutated has been restructured so the mutation opportunity no longer exists as an AST node -- no per-mutant ignore comments anywhere in this package. So the gate is the literal maximum rather than a derived-with-slack figure.
breakThreshold: 100,
});