A best-practices skill for Terraform and OpenTofu, for AI coding agents (Claude Code, Cursor, Copilot, Gemini CLI, OpenCode, Codex, and more). It helps the agent test code, structure modules, set up CI/CD, and write production infrastructure code.

Testing frameworks

• Decision matrix for native tests vs Terratest
• Testing workflows (static, integration, E2E)
• Examples and patterns

Module development

• Structure and naming conventions
• Versioning strategies
• Public vs private module patterns

State management

• Remote backends (S3, Azure, GCS, Terraform Cloud)
• Locking and security
• Multi-team state isolation
• Migration and recovery procedures

CI/CD integration

• GitHub Actions workflows
• GitLab CI examples
• Cost optimization
• Compliance automation

Security and compliance

• Trivy and Checkov integration
• Policy-as-code patterns
• Compliance scanning workflows

Quick reference

• Decision flowcharts
• Common patterns (DO vs DON'T)
• Cheat sheets

Installed through one Claude Code marketplace, antonbabenko/agent-plugins (terraform-skill is listed there as an external plugin). Do not also add antonbabenko/terraform-skill as a marketplace - both use the same marketplace name and will clash.

Works with any Agent Skills-compatible tool, via skills.sh:

npx skills add https://github.com/antonbabenko/terraform-skill

/plugin marketplace add antonbabenko/agent-plugins
/plugin install terraform-skill@antonbabenko

gemini extensions install https://github.com/antonbabenko/terraform-skill

git clone https://github.com/antonbabenko/terraform-skill.git ~/.cursor/skills/terraform-skill

/plugin install https://github.com/antonbabenko/terraform-skill
# or
git clone https://github.com/antonbabenko/terraform-skill.git ~/.copilot/skills/terraform-skill

git clone https://github.com/antonbabenko/terraform-skill.git ~/.agents/skills/terraform-skill

git clone https://github.com/antonbabenko/terraform-skill.git ~/.agents/skills/terraform-skill

git clone https://github.com/antonbabenko/terraform-skill.git ~/.antigravity/skills/terraform-skill

git clone https://github.com/antonbabenko/terraform-skill
mkdir -p ~/.claude/plugins
ln -s "$(pwd)/terraform-skill" ~/.claude/plugins/terraform-skill

After installation, try:

"Create a Terraform module with testing for an S3 bucket"

Claude picks up the skill automatically when working with Terraform or OpenTofu code.

Install the code-intelligence plugin alongside this one:

/plugin marketplace add antonbabenko/agent-plugins
/plugin install code-intelligence@antonbabenko

It holds the general, any-language rules for navigating code (when to use a language server, plain text search, or fuzzy search; how to anchor a lookup to a position; what to do when a tool fails; saying so when one tool is swapped for another). terraform-skill is the Terraform-specific version of those rules. Why install it:

• Fewer tokens - the rules live in one place. The agent loads them when needed instead of repeating them in every language skill.
• More accurate - it finds definitions and references by meaning, not by plain text matching, so renames and refactors do not miss spots or change the wrong ones.
• Faster - it picks the right tool the first time instead of retrying, and says up front when it had to use a different one.

terraform-skill works on its own without it. The name code-intelligence is not unique; if a code-intelligence skill is active, check it is the one from antonbabenko/agent-plugins.

Create a module with tests:

"Create a Terraform module for AWS VPC with native tests"

Set up remote state:

"Configure S3 backend with DynamoDB locking for Terraform state"

Review existing code:

"Review this Terraform configuration following best practices"

Generate CI/CD workflow:

"Create a GitHub Actions workflow for Terraform with cost estimation"

Testing strategy:

"Help me choose between native tests and Terratest for my modules"

State management:

"How should I organize state files for a multi-team environment?"

Decision matrices for native tests (Terraform 1.6+) vs Terratest (Go-based), plus multi-environment testing patterns.

Naming conventions (terraform-<PROVIDER>-<NAME>), directory structure, input/output design, version constraints, and documentation standards.

GitHub Actions, GitLab CI, Atlantis, Infracost cost estimation, Trivy/Checkov scanning, and compliance checks.

Static analysis, policy-as-code, secrets management, state file security, backend encryption, and compliance scanning workflows.

Side-by-side DO vs DON'T examples for variable naming, resource naming, module composition, state management, and provider configuration.

Sources:

• Patterns from terraform-best-practices.com
• Approaches used across the terraform-aws-modules collection
• AWS Hero experience with enterprise IaC

Version-specific guidance:

• Terraform 1.0+ features
• OpenTofu 1.6+ compatibility
• Native test framework (1.6+)
• Current tooling ecosystem (2024-2026)

Decision frameworks: not just "what to do" but "when and why".

• An AI agent with skill support: Claude Code, Cursor, Copilot, Gemini CLI, OpenCode, Codex, or any Agent Skills-compatible host
• Terraform 1.0+ or OpenTofu 1.6+
• Optional: Terraform MCP server for registry integration

The skill works without a language server. To jump to a definition, find references, outline a file, or show hover docs, it can also use terraform-ls, HashiCorp's official Terraform language server.

• Optional. Without terraform-ls the skill falls back to text search (rg) plus reading files. Nothing breaks; you get text matches instead of matches by meaning.
• Needs. A local terraform (or tofu) binary on PATH, and terraform init run in the workspace, before it can resolve names across modules and providers.
• Install. Get it from the terraform-ls releases page, or turn it on through your editor or agent host. Use whatever version your host supports.

How the skill uses it:

• Use the language server to follow a name to where it is defined or used; use rg plus reading files for exact text, known names, .tfvars, comments, and non-HCL files.
• Point the language server at a spot in the file first (find an occurrence, then ask about that position).
• terraform-ls cannot rename for you. To rename a variable, local, or output: find every reference, then edit each by hand. To rename a resource or module address: use a moved block, not a text replace.

See CLAUDE.md for skill development guidelines, content structure, how to propose improvements, and the validation approach.

Report bugs or request features via GitHub Issues.

• Terraform Language
• Terraform Testing - native test framework
• OpenTofu Documentation
• HashiCorp Recommended Practices

• Terraform compliance-as-code docs - Compliance frameworks, controls, implementation guides, remediations, etc
• Awesome Terraform
• Awesome Terraform Compliance
• Terraform Best Practices - the guide this skill is based on
• terraform-aws-modules - AWS modules collection
• Terratest - Go testing framework for Terraform
• Google Cloud Best Practices
• AWS Terraform Best Practices

• pre-commit-terraform - pre-commit hooks for Terraform
• terraform-docs - generate documentation from modules
• terraform-switcher - Terraform version manager
• TFLint - Terraform linter
• Trivy - IaC security scanner

Apache 2.0