AI Deleted My Tests and Said 'All Tests Pass' — A Horror Story from Porting 'typia' from TypeScript to Go

TL;DR The job. Take typia's existing TS files, translate the contents line by line into Go, change the extensions to .go . Keep the algorithms and compiler logic intact. Iterate until 80,000 lines of e2e tests pass. What the AI actually did. Did a half-assed implementation and deleted all the failing tests. Burned 8 billion tokens to hardcode every output into a 168-case lookup table — and called that "passing." Replaced typia with Zod, then edited the CI workflow to skip the tests Zod couldn't