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Vitest
Experience: Since October 2025
Overview
The test runner in every TypeScript project I start. It reuses the app's own build config, so tests run against the same module resolution as production rather than a parallel universe of mocks.
Related Skills
Projects
Kuri.gg
The money, leveling and games packages, where a rounding bug is a real economy bug.
bookprice.net
Price normalisation and vendor parsing, with coverage reported in CI.