upgrade is a hidden system workflow behind bunx smthrs upgrade. It checks the installed Smithers version, fetches relevant changelog
entries, computes the package-manager-specific upgrade command, and asks a
cheap agent to run it, escalating to the smart agent pool only if the cheap
attempt can’t proceed safely.
Run directly for the durable workflow form:
needsHelp reason.
Like other system workflows, it’s hidden from default listings but available
via workflow list --system or workflow run upgrade.