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ku5icku5ic/claude-kit/skills/opentofu-patterns/SKILL.md

opentofu-patterns

Skill2 starsChanged 8 days agoMITView on GitHub

OpenTofu and Terraform patterns for config-driven refactoring (moved, import, removed), for_each vs count, variables and secrets in state, version pinning and the lock file, fmt/validate in CI, and review-time anti-patterns. Use whenever the project contains `.tf`/`.tfvars` files or a `.terraform.lock.hcl`, OR the user asks about OpenTofu, Terraform, HCL, state, providers, or modules, even if neither tool is mentioned by name.

The file

We split this skill into the rules it gives an agent

1 rule. About 0 are common, 1 is distinctive, and 0 are very specific to this project.

  • ≈0

    Common · estimate

    Many files like this have a rule of this kind.

  • ≈1

    Distinctive · estimate

    This author's own choices. Worth a look.

  • 0

    Very specific

    Tied to their project's names, files or tools. Probably skip.

  • Common
  • Distinctive
  • Very specific
  1. Distinctive:

    Default assumption: OpenTofu 1.12.

    line 8

≈ “Common” is an estimate: at least 1 in 5 of the 350,495 skill files we read have a rule of the same kind, not the same words. “Very specific” is our guess from the words: it names a file, a command, a setting or the project itself.

Keep what fits and drop the rest. Your version, ready for your agents.
Files
SKILL.md

OpenTofu patterns

Default assumption: OpenTofu 1.12. Most rules hold for Terraform too, since the language is shared.

  • Features marked "OpenTofu 1.11+" or "1.12+" are OpenTofu releases; check Terraform's own docs before using one in a Terraform project.
  • Adapt advice to required_version in the project's versions.tf (or wherever the terraform {} block lives) and to which CLI the project runs (tofu or terraform).

Reference files

FileCovers
reference/refactoring-and-state.mdmoved, import, removed blocks, lifecycle, what state holds
reference/configuration.mdfor_each vs count, enabled, variables, pinning and the lock file, provisioners
reference/workflow.mdfmt and validate in checks, and what the kit's guard blocks
reference/anti-patterns.mdSeven review-time anti-patterns with severity calls

References

Version notes

Checked: 2026-09-26 against https://opentofu.org/docs and the GitHub releases of opentofu/opentofu and hashicorp/terraform

  • OpenTofu 1.12.6 (2026-08-19); 1.12: lifecycle { destroy = false }, and prevent_destroy may refer to variables. 1.13.0-rc1 (2026-09-17) is a release candidate, not covered.
  • OpenTofu 1.11: the enabled meta-argument, ephemeral resources, variables and outputs, and write-only attributes.
  • Terraform 1.16.4 (2026-09-23), for reference only.

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