v0.42.73.1

Removes the PR gate that v0.42.73.0 added, and reverts the v0.42.72.1 contribution-policy change it enforced. The gate cannot function on this repository, and it caused a real incident before that was understood.

The gate needed two things this repository does not grant it: an ANTHROPIC_API_KEY Actions secret for its verdict, and read-write workflow permissions to post a comment or set a label. Without them it can only skip. Worse, on its first live runs a read-only token turned every API call into a 403, the code treated that as a crash, and the check went red on an outside contributor's pull request four times with no comment explaining why. That was fixed in v0.42.73.0, but a check that runs on every pull request and can never reach a verdict does not earn its place in the repository.

The v0.42.72.1 contribution policy is also withdrawn: the human-written intent paragraph and gbrain-in-use screenshot are no longer required on issues and pull requests. CONTRIBUTING.md, both issue templates, and the pull-request template return to their pre-2026-08-02 state, and issues and PRs are reviewed on their content by maintainers, as before.

The code is preserved in git history at v0.42.73.0 and can be restored if the repository ever grants those permissions. If it is restored, the mechanical half — the intent and screenshot check, the version-first title rule, the red flags — should render to the Actions job summary instead of a comment, because that needs no token permission and no API key.

To take advantage of v0.42.73.1

gbrain upgrade

Nothing to change. Everything else v0.42.73.0 shipped — the five contributed correctness fixes, slug_filter, and the four dependency pins that cleared six CVEs — is unaffected and stays.