On the bundled main.tf: 9 findings (1 error, 4 warnings, 4 info) from 13 rules, led by a required_version pin that excludes OpenTofu 1.11.14.

Who it’s for
Platform and DevOps engineers moving Terraform repos and CI pipelines from HCP Terraform to OpenTofu.

What breaks, and when
OpenTofu 1.11 and earlier check required_version against the OpenTofu version, so tofu init stops on a Terraform pin; the HCP Terraform Free plan stops at 500 managed resources.

What you get
• SKILL.md, an offline Node scanner and the 13-rule table
• file:line, severity and the OpenTofu fix per finding

See it first
The real output of the bundled example is on getreadystack.com/skills/opentofu-migration-check/ — free, no sign-up, so you see what it finds before you pay.

Install in 30 seconds
Unzip into ~/.claude/skills/, then ask Claude Code: “We’re moving this repo from Terraform to OpenTofu. What will break or stay tied to HCP Terraform? Don’t edit anything yet.”. Needs Node 16+.

What it does not do
It does not run terraform or tofu, read state or move it; no network calls, no edits without your OK.

FAQ
Q: How is this different from asking Claude without the skill?
A: The skill carries a dated rule table and a scanner that reads every file, so Claude quotes the exact date and line instead of guessing from memory.
Q: How do I get the files?
A: In your Whop library after paying: the lesson “opentofu-migration-check.zip”.