Sweeps across about 1800 repositories: which default branches are red, which runners stopped, which modules are ahead of their tag, which foreign judges the CI never installs, and which tests exist without ever running. One command per sweep, under cmd/.
The go-* landings’ shared design as a Hugo module, and the command that derives a brand from a logo, checks a landing against the reference (text and pixels) and checks every link of the built site. This very landing uses it.
Proves that a test can fail: applies one exact source mutation, runs the suite, restores whatever happens, and exits 0 only when the suite went red. mutsweep asks the same of every refusal in a package.
Waits until a pull request’s checks are finished, and refuses to call an empty check list a pass. Also waits for a branch or a workflow run.
Which installed Go tools were built with an older toolchain, and of those which actually parse Go source, because only for those is staleness a wrong answer. Also finds duplicates and older releases of themselves.
The Go toolchain floor a module declares, against the floor a fix requires: reads the published go.mod, where a consumer reads it, and says which modules are below. modfloor pseudo fails when a fleet module is required at a pseudo-version.
Which repositories read a ZIP entry or decode an image without a ceiling: the sweep that follows a fix across its siblings. Every hit is a lead, not a verdict.
Which repository already does this? A live, dated inventory of every organisation, because a hand-kept capability map drifts.
Which of a set of landing pages is the odd one out, by counting what each page puts in the shared design system.
Runs every Go fuzz target of a module, in parallel within a load budget, and reports crashers with the corpus file that reproduces them.
Shared community health files, Renovate runner and preset for the organisation. It has no release: it is configuration.
The documentation (Hugo + Hextra): one page per repository, from each repository’s README at its latest tag.