The only build tool that allows you to pass in a repo and build your project, while getting extensive metadata tied to your shippable product. There's no need to frantically track down build info if something goes wrong. Know who built it, in what directory, on what machine, at what time. Never not know again.
Run builder init [repo url] on a project (must be a compatible language). This creates a new project with a hidden, logs, workspace, and artifact dir.
For compiled, the artifact dir contains an executable file, both json and yaml metadata, and a zip of those contents. That zip can be sent off wherever by specifing the "--output" path flag.
You can then cd into the path of your builder.yaml and run the builder command. This will pull any changes from the repo and create a new artifact (meaning a shippable product, either zip or executable) with new metadata.