skill CX Codex

terraform-style-guide — Claude Code skill: HashiCorp Terraform

Q: How do I install terraform-style-guide in Claude Code?

Run `npx skills add hashicorp/agent-skills --skill terraform-style-guide -a claude-code`. The skill will load into `~/.claude/skills/terraform-style-guide/SKILL.md` and be available in Claude Code.

A skill that generates and validates Terraform code according to HashiCorp's official standards. Ensures consistent, secure, and readable HCL across your configurations.

Install into Claude Code · Skills CLI (Vercel) All methods and platforms ↓

npx skills add hashicorp/agent-skills --skill terraform-style-guide -a claude-code

Open on GitHub

What terraform-style-guide does

terraform-style-guide provides a complete ruleset for organizing Terraform configs: file structure, code formatting, resource and variable naming, version management, and sensitive data handling. The skill draws from HashiCorp recommendations and includes examples for common scenarios—from basic AWS resources to dynamic creation with for_each and conditional deployments using count.

It covers file organization (Terraform, providers, variables, outputs in separate files), two-space indentation, equals-sign alignment, lowercase with underscores for all names. Examples show provider versioning, multi-region setup, and validation checks. Security guidance includes what to commit (.tf files and .terraform.lock.hcl), what to ignore (tfstate, .tfvars with secrets), and how to mark sensitive values.

Code quality relies on terraform fmt and terraform validate—the skill includes these in its review checklist.

What it helps with

Align existing Terraform code with HashiCorp standards
Generate a new configuration with proper file structure and formatting
Verify resource, variable, and output naming conventions
Set up provider and Terraform version constraints following best practices
Ensure sensitive data does not leak into version control

Example prompts for the agent

Generate a Terraform config for AWS VPC with two subnets following the style guide
Help me reformat this terraform.tf to match HashiCorp standards
Review my variables and outputs in main.tf: do they meet the recommendations for types and descriptions?

How to install terraform-style-guide

1Skills CLI (Vercel)

npx skills add hashicorp/agent-skills --skill terraform-style-guide -a claude-code

2Manually: put the files in place

~/.claude/skills/terraform-style-guide/SKILL.md

Copy the whole skill folder; for one project use .claude/skills/terraform-style-guide/

1Skills CLI (Vercel)

npx skills add hashicorp/agent-skills --skill terraform-style-guide -a codex

2Manually: put the files in place

.agents/skills/terraform-style-guide/SKILL.md

For all projects use ~/.agents/skills/

1Skills CLI (Vercel)

npx skills add hashicorp/agent-skills --skill terraform-style-guide -a cursor

2Manually: put the files in place

.cursor/skills/terraform-style-guide/SKILL.md

Cursor also reads .agents/skills/ and .claude/skills/

1GitHub CLI

gh skill install hashicorp/agent-skills terraform-style-guide

2Manually: put the files in place

.github/skills/terraform-style-guide/SKILL.md

1Skills CLI (Vercel)

npx skills add hashicorp/agent-skills --skill terraform-style-guide -a gemini-cli

2Platform CLI

gemini skills install https://github.com/hashicorp/agent-skills --path plugins/terraform/skills/terraform-style-guide

Manually: put the files in place

.devin/skills/terraform-style-guide/SKILL.md

The legacy .windsurf/skills/ path still works

Skills CLI (Vercel)

npx skills add hashicorp/agent-skills --skill terraform-style-guide -a opencode

Step by step, with commands for each platform: How to install skills in Claude Code: five ways

Questions about terraform-style-guide

How do I install terraform-style-guide in Claude Code?

Run npx skills add hashicorp/agent-skills --skill terraform-style-guide -a claude-code. The skill will load into ~/.claude/skills/terraform-style-guide/SKILL.md and be available in Claude Code.

What does terraform-style-guide do?

The skill helps you write Terraform configs according to HashiCorp's official standards: proper file organization, formatting, naming conventions, provider versioning, and security best practices.

Do I need additional tools for this skill to work?

The skill itself is a code generator and reference. For quality checks, run terraform fmt -recursive and terraform validate. You can also use tflint, checkov, or tfsec for linting and security scanning.

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