Modules

Official modules give a workspace useful work to do: test code, run a test runner, lint and format source, or validate Helm charts.

Install a module when you want a real tool that runs the same way locally, in CI, and in Dagger Cloud. Most modules expose checks, generators, or repair workflows, so the work stays consistent everywhere it runs.

Install any module with dagger mod install:

dagger mod install github.com/dagger/go

Each module page explains what the module is for, which checks or generators to reach for first, the settings that tune it, and how it fits into a workspace.

Module	Purpose
Go	Test, lint, and run generators across every Go module in a workspace.
Pytest	Run Python tests with Pytest.
Jest	Run Jest tests for JavaScript and TypeScript.
Vitest	Run Vitest tests for JavaScript and TypeScript.
ESLint	Lint JavaScript and TypeScript source.
Prettier	Check and rewrite source formatting.
Biome	Lint and format JavaScript and TypeScript with one tool.
ShellCheck	Check shell scripts.
PSScriptAnalyzer	Check PowerShell scripts.
Helm	Lint Helm charts and check rendered templates.