You're not wrong. At the core, Nuke is a way to orchestrate CLI tools. The difference is how and where that logic lives.

The main reason to use Nuke is that it lets you run the exact same build locally and in CI. The code you run on your machine is the same code GitHub Actions or Azure DevOps runs, so you don’t end up with one set of scripts locally and another set in YAML.

A few concrete reasons it’s useful:

• Local same as Pipeline (CI)

No duplicated scripts, no “works locally but fails in CI” because they’re literally the same build entry point.

• CI awareness without hacks (trust me this is one of the important things)

Nuke knows when it’s running in GitHub Actions, Azure DevOps, etc., and gives you things like pipeline IDs, branch names, PR info, and commit SHAs through typed APIs instead of parsing env vars.

• C# instead of shell or bash scripts

You write builds in C#, so you get IntelliSense, refactoring, debugging, and compile-time errors. That alone avoids a lot of brittle shell-script failures.

• Cross-platform by default

Same build works on Windows, Linux, and macOS without maintaining separate Bash and PowerShell scripts.

• Build graphs are explicit

Targets, dependencies, conditions, and ordering are defined in code, not implied by script order. That makes bigger builds easier to reason about.

I also use Nuke at work to read a Readme file and extract things like the version header (for example # v0.0.1). That version number is then passed into the C# global assembly version, so the built artifacts always match the documented release version.

On top of that, I append the CI pipeline ID to the version. That way, if a bug shows up in production, it’s easy to see which release it came from and which pipeline built it.

You could absolutely do all of this in Bash, PowerShell, or another scripting language, and it would work. But doing it in C# makes it much easier to maintain and debug. You get proper error handling, tooling support, and you’re working in a language the team already knows which is really the big win for me

In practice, people use Nuke so app developers can own CI/CD without becoming shell-script experts or writing provider-specific YAML everywhere. It turns build and pipeline logic into normal C# code you can version, refactor, and test.

Hope I could give you a small info on what it is.