Vitest 4 V8 AST Coverage Remapping Shifts Branch Coverage Below Threshold

Domain: testing · Evidence E0 — Contributor self-reported
vitestcoveragev8astbranch-coveragetesting

Summary

Upgrading `vitest` and `@vitest/coverage-v8` from 3.x to 4.x dropped branch coverage from 81.30% to 74.96%, causing the `npm run test:coverage` gate to fail at …

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