Was curious what Dagger does and this is what the homepage says
> The cross-platform composition engine
> Build powerful software environments from modular components and simple functions. Perfect for complex builds and AI workflows.
This is generic to point of being useless.
Everything is a composition engine. Javascript is a composition engine. macOs is a composition engine.
I would lump dagger in with JS (programming language, ecosystem, runtime) and MacOS (operating system) before comparing it to any single tool.
Answering "what does dagger do" can be tough, because there are very broad applications.
Its always hard to describe general purpose platforms like these. Dagger is an open platform for building composable software. It has SDKs, sandboxed execution environment, observability, and now this shell interface.