# PR#106: The Codex Gate Holds a Severe Defect

> **WARNING:** This document describes only the change applied in this PR.
> It may already be outdated once the next PR is merged.
> Historic PR documentation is not maintained along with new PRs; treat it as a snapshot.

## Related Links

- [PR#105](2026-10-14-PR#105-codex-gate-test.md): the first PR through the gate, with a defect of low severity.

## Problem

PR#105 showed that an open Codex finding holds the merge, but its defect was of low severity.
It is not known whether Codex finds a defect that weakens the gate,
and whether a critical PR then waits for the human.

## Non-Goals

- No change of the runner in the squash merge.

## Solution

The PR tests the gate in two steps:

1. One commit adds a severe defect on purpose.
   Codex must report it, and `ai-review/codex` must stay `pending`.
2. The next commit removes the defect, and the threads get resolved.
   If Codex rates the PR as critical, `ai-review/codex` must wait for an approval of the human after the Codex comment.

The squash merge contains neither the defect nor its removal.

The defect let the approval of the bot `ai-reviewer` count as a human approval in `run_pr`,
so a critical PR could pass the Codex gate without the human; the tests stayed green.
Result of step 1: Codex rated the PR critical and reported the defect as high; `ai-review/codex` was `pending`.
werkrevisor saw the change in the approval path of the gate, but not its effect:
its only finding was that the PR document did not explain it, and Jev rated no changed file as weakening the checks.

- Werkbaum: a node for this test below `#model.codex.gated`.
- Version 0.41.5.

## Open Questions

None.

## Additional Changes

- A test checks that the approval of werkrevisor is no human approval for the Codex gate;
  it fails with the defect and passes without it.