# Npx passproof install: agent can't say tests passed unless the runner printed

> Source: <https://github.com/AziizBg/passproof>
> Published: 2026-08-18 20:51:14+00:00

**If it says the tests passed, the runner output has to be in the same turn.**

Does not run your tests. Blocks the claim.

```
agent:  All tests passed.
passproof:  blocked. no runner output in this turn.

$ pytest -q
3 passed in 0.12s
agent:  All tests passed.
passproof:  ok.
npx passproof install
```

That copies one file into the repo and wires **Cursor** (`stop`

+ `afterShellExecution`

) and **Claude Code** (`Stop`

+ `PostToolUse`

on Bash). Chat is free. “Done” is free. “All tests passed” without pytest/jest/vitest/cargo/go output in that turn is not.

```
npx passproof install --global
npx passproof uninstall
```

- Not
[donegate](https://github.com/intrepideai/donegate). It does not re-run your suite when the agent stops. - Not
[no-vibes](https://github.com/waitdeadai/no-vibes). It does not police the word “done”. - Not a prompt. CLAUDE.md will not save you. This is a hook.

```
npx passproof demo
node --test
```

MIT