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How to stop AI changes that delete or weaken tests with No Human

Count deleted tests, new skips, and tautological assertions before any review runs.

Who it is forA maintainer who accepts AI-assisted pull requests and needs a mechanical check for tests quietly removed to make a build pass.

The problemA coding agent can go green by deleting or skipping failing tests, and a human reviewer may miss it in a large diff.

The outcomeAttempts that delete or weaken tests are stopped before review unless the change is justified against your acceptance criteria.

What you need first

  • Python 3.12+
  • uv
  • git
  • Node with npm, for the board build from source
  • An Anthropic credential: an ANTHROPIC_API_KEY or a Claude subscription OAuth token from claude setup-token
  • A git repository you want changed, and a GitHub or GitLab issue URL or a configured tracker

Steps

  1. Run uv sync in a source checkout of No Human to install the nh entry point.
  2. Run (cd web && npm install && npm run build) to build the board.
  3. Run uv run nh init to set the token, config, and first repo.
  4. Run uv run nh doctor to verify the install before relying on it.
  5. Add a task with uv run nh task add <issue-url> --repo <local-repo-path> and watch the run in the event stream. (inferred, check the README)

Prompt for your agent

Using the no_human repo at <checkout-path>, add the task <issue-url> for the repo at <local-repo-path>. Report whether the tamper guard stopped any attempt for deleted or weakened tests, and cite the event that shows the result.

Caveat. The guard counts deletions and weakened assertions mechanically, so it does not judge whether the remaining tests are correct, and a source build requires Node and npm.

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