My commands vanished with exit 0. The culprit was a file named env.
`env -u VAR command` did nothing. Exit code 0, no output, no error. A different command, same thing. A different variable, same thing. Any invocation that started with `env` just quietly evaporated. What finally made the problem visible was a `git init` that reported success while creating no `.git` directory at all. That was a year ago. The case closed last month, and the culprit was not uv, not some third-party installer, not anything exotic. It was this repo’s own bootstrap script. The thing that caught it was the regression test I had written for the original incident.