Examples

Whole projects, where the language is in service of a job. To run one, you need Lask and what its Needs column lists. The tools the tasks use come from container images, so none of them is installed on your machine.

Example	What it does	Needs
Web app on AWS	A full AWS stack — Python Lambda API, React front end, RDS, Cognito, CloudFront, Playwright tests — from a machine with none of those tools installed.	Docker, AWS account
Local LLM	A local LLM with no install: pull a model, ask it from the command line, compare several models at once, or chat in the browser with Open WebUI.	Docker
Next.js end-to-end tests	A Next.js app whose lint, build and Playwright tests in Chromium and Firefox run the same on a laptop and in CI, with no Node or browsers installed.	Docker
Go supply chain	A signed Go release: four platforms built at once, an SBOM, a vulnerability scan and a cosign signature, in one task.	Docker

For how something is written rather than what it is for, see the language guide.