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Subagent

Terra

Designs Terraform module structures, state management strategies, drift detection workflows, and IaC best practices. Use when you need Terraform modules, workspace strategy, or a drift remediation plan. Trigger with \"design my Terraform module\", \"audit my Terraform code\".

Type
Subagent
GitHub stars
2.8k
License
MIT
Repo last updated
Sep 27, 2026
Model
sonnet
Version
1.0.0
Author
Jeremy Longshore <[email protected]>

What Terra is

Terra is a subagent published in the jeremylongshore/tons-of-skills-marketplace repository on GitHub, which has about 2.8k stars. The repository describes itself as: “Model-agnostic agent-skills platform with a harness-free canonical layer, verified adapters, and the ccpi package manager. Explore at tonsofskills.com.”

A subagent is a specialist assistant that Claude can hand part of a task to. It is a markdown file whose frontmatter sets a name, a description that tells Claude when to delegate, and optionally the tools and model it may use; the body becomes the subagent's own system prompt.

Because a subagent works in its own context, it keeps the main conversation focused: Claude can send a narrow job, such as a review or a specialised analysis, to Terra and get back a compact result.

How to install Terra

Claude Code

  1. Download terra.md from the repository.
  2. Save it to ~/.claude/agents/ to use it in every project, or to .claude/agents/ inside one project to share it through version control.
  3. Claude Code watches these folders, so the subagent is usually available right away. Ask Claude to use it by name, or @-mention it to make sure it runs.

Claude Cowork

  1. Cowork loads subagents through plugins. If the repository is packaged as a plugin marketplace, add it under Customize → Plugins → Add marketplace and install the plugin that contains this subagent.
  2. Otherwise, bundle the file into your own plugin's agents/ folder and upload it from Customize → Plugins.

New to extending Cowork? Our plugins guide and Customize guide explain how skills, plugins, and connectors fit together.

Inside the source file

An excerpt from plugins/ai-agency/tonone/agents/terra.md, shared under the repository's MIT license. Read the full file on GitHub.

You are Terra — Terraform & IaC Specialist on the Infrastructure Specialist Team. Designs Terraform module structures, state management strategies, and IaC best practices.

Think in operational risk, failure modes, and cost tradeoffs. Every infrastructure decision is a bet on reliability, performance, and cost — make the tradeoffs explicit.

Communication

Respond terse. All technical substance stays — only filler dies. Follow output-kit protocol: compressed prose, no filler, fragments OK. Documents: normal prose. See docs/output-kit.md for CLI skeleton, severity indicators, 40-line rule.

Operating Principle

Infrastructure as code is code — it needs the same discipline: version control, code review, testing, and modularity. Terraform state is the source of truth for your infrastructure; protect it like production data (remote state, state locking, encryption). Modules should be opinionated enough to enforce standards but flexible enough to cover common variations. Drift between code and reality is a security and reliability risk.

What you skip: Cloud-specific resource design — that's Forge/Multi. Terra focuses on the IaC layer, not the architecture.

What you never skip: Never store Terraform state locally in a team environment. Never commit secrets to Terraform code — use data sources or Vault. Never apply Terraform changes without a plan review.

Scope

Owns: Terraform module design, state management, workspace strategy, drift detection, IaC testing

Skills

  • Terra Module: Design a Terraform module structure — inputs, outputs, resource organization, and versioning.
  • Terra Drift: Design a Terraform drift detection and remediation workflow.
  • Terra Recon: Audit existing Terraform code — find state issues, security gaps, and module quality problems.

Key Rules

  • Remote state: S3+DynamoDB (AWS), GCS (GCP), or Terraform Cloud — always encrypted + locked
  • Module structure: one module per logical resource group; avoid mega-modules
  • Workspaces vs directories: workspaces for env parity; directories for structural differences
  • Testing: Terratest for integration tests, tflint for linting, checkov for security scanning
  • Drift detection: terraform plan in CI on schedule; alert on any diff vs expected

Process Disciplines

When performing Terra work, follow these superpowers process skills:

Iron rule: No completion claims without fresh verification.

Before you install

  • Read the whole file first. Skills, commands, and subagents are instructions Claude will follow, so make sure they match what you want.
  • Check which tools, scripts, or MCP servers it uses. Local servers and scripts run with your permissions.
  • Try it in a test project or a copy of your files before pointing it at real work.
  • Pin the version you tested, and review changes before updating.
  • Watch for instructions that fetch web content or run shell commands; those are where prompt injection risks start. See our prompt injection guide.

FAQ

What is Terra?

Terra is a subagent for Claude Code and Claude Cowork from the jeremylongshore/tons-of-skills-marketplace repository on GitHub. Designs Terraform module structures, state management strategies, drift detection workflows, and IaC best practices. Use when you need Terraform modules, workspace strategy, or a drift remediation plan. Trigger with \"design my Terraform module\", \"audit my Terraform code\".

How do I install Terra in Claude Code?

Download terra.md from the repository. Save it to ~/.claude/agents/ to use it in every project, or to .claude/agents/ inside one project to share it through version control. Claude Code watches these folders, so the subagent is usually available right away. Ask Claude to use it by name, or @-mention it to make sure it runs.

Can I use Terra in Claude Cowork?

Cowork loads subagents through plugins. If the repository is packaged as a plugin marketplace, add it under Customize → Plugins → Add marketplace and install the plugin that contains this subagent. Otherwise, bundle the file into your own plugin's agents/ folder and upload it from Customize → Plugins.

Is Terra safe to install?

It is a third-party community resource, not reviewed by Anthropic or this site. Read the source file first, check which tools and connectors it uses, and install only from sources you trust.

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Listing data comes from the public GitHub repository and was last checked in September 2026. Excerpts are © their authors and shared under MIT. This directory is independent and not affiliated with Anthropic or the resource's authors.