Turning it off

mesthiri uninstall owner/repo --operator "Your Name <you@example.org>"

Opens a pull request removing the shim workflow and .mesthiri/. Merging it stops everything. Labels mesthiri applied stay where they are, because they are your repository's data, not mesthiri's; delete them if you want them gone.

To stop it right now without waiting for a review, disable the workflow in the Actions tab, or revoke the Apps' installation. Nothing keeps running somewhere else, because there is no somewhere else.