Dagger — Programmable CI/CD Engine

Key Features

Code, Not YAML

Write pipelines in Python, TypeScript, Go, or PHP — with IDE support, type checking, and testing.

Run Anywhere

Same pipeline runs on your laptop and in CI. Debug locally, push with confidence.

Automatic Caching

Every step is content-addressed and cached. Rebuilds only what changed.

Container-Native

Every step runs in a container. No "works on my machine" — reproducible by default.

Dagger Functions

Reusable pipeline modules from the community:

dagger -m github.com/dagger/dagger/dev/go call lint --source=.
dagger -m github.com/sagikazarmark/daggerverse/golangci-lint call run --source=.

Multi-Language SDKs

Full SDKs for Python, TypeScript, Go, PHP, and Elixir. GraphQL API underneath.

FAQ

Q: What is Dagger? A: A programmable CI/CD engine. Replace YAML pipelines with real code (Python/TypeScript/Go). Run locally or in any CI. Automatic caching. 15.6K+ stars.

Q: Does Dagger replace GitHub Actions? A: Dagger runs inside GitHub Actions (or any CI). It replaces the YAML workflow definitions with code, while using the CI system for triggers and scheduling.