December 2026

Advent of *Terraform

24 days of infrastructure puzzles. Write OpenTofu in your browser, deploy it into a sandboxed AWS, and help Santa's platform team get through December.

1 Decdoors open

# day-01.tf
resource "aws_s3_bucket" "naughty_list" {
  bucket = "santas-naughty-list"
}

$ tofu apply
aws_s3_bucket.naughty_list: Creating...
aws_s3_bucket.naughty_list: Creation complete

Apply complete! Resources: 1 added.
* Day 1 solved

Nothing to install

An editor and a real tofu run in your browser. Every player gets their own isolated sandbox.
No AWS bill

Everything deploys into an emulated AWS, so you can break things as hard as you like.
A new door every day

Starts gentle with buckets and queues, then ramps up to the kind of thing you'd get paged for.

Nothing to install

No AWS bill

A new door every day