Explore the curriculum

Live in a real shell: navigate the filesystem, compose pipelines, search a codebase, and manage permissions — by running real commands in a safe sandbox.

Automate the boring parts: variables, conditionals, loops, and functions — write real scripts and run them in the browser.

Version-control your work like every engineering team does: commit, branch, merge, resolve conflicts, and push to a remote — running real git in a safe sandbox.

The glue language of infrastructure work: write real Python — variables, data, functions, JSON, CLIs, error handling — graded by tests, the way teams actually work.

Learn the cloud by driving it: make real AWS API calls with the CLI — storage, identity, and more — against a safe mock AWS, no bill.

Build the mental model, write your first resource, and truly understand state — all in the browser, no cloud account and (for lesson 1) no login required.

Write real Terraform in the browser and watch init / validate / plan run against a safe sandbox. AWS-based, no cloud account required.

Run real Terraform against a sandboxed AWS: apply real resources, then the production toolkit — remote state & locking, modules, import, and multi-environment workflows — with every step checked.

Describe a machine's desired state and converge to it — playbooks, idempotency, variables, templates, handlers, and roles. The declarative sibling of Terraform.