How do I install the Terraform Azurerm Set Diff Analyzer skill?

Run npx skillmds add tools-only/terraform-azurerm-set-diff-analyzer in your terminal (requires Node.js), paste this page's agent-chat prompt into Claude, Cursor, or any MCP-connected agent, or download the SKILL.md file and copy it into your agent's skills directory.

Is Terraform Azurerm Set Diff Analyzer safe to use?

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Which AI agents work with Terraform Azurerm Set Diff Analyzer?

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Is Terraform Azurerm Set Diff Analyzer free to use?

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Who published Terraform Azurerm Set Diff Analyzer?

tools-only (@tools-only) published this skill. Their other Agent Skills are listed on their SkillMD profile.

Terraform Azurerm Set Diff Analyzer by tools-only

Name: Terraform Azurerm Set Diff Analyzer
Rating: 4.666666666666667 (3 reviews)
Author: tools-only

Terraform Azurerm Set Diff Analyzer

Analyze Terraform plan JSON output for AzureRM Provider to distinguish between false-positive diffs (order-only changes in Set-type attributes) and actual resource changes. Use when reviewing terraform plan output for Azure resources like Application Gateway, Load Balancer, Firewall, Front Door, NSG, and other resources with Set-type attributes that cause spurious diffs due to internal ordering changes.

tools-only db68c92 3 files · 5.1 KB Updated Sep 8, 2026 7 repo stars

File contents

Terraform AzureRM Set Diff Analyzer

A skill to identify "false-positive diffs" in Terraform plans caused by AzureRM Provider's Set-type attributes and distinguish them from actual changes.

When to Use

terraform plan shows many changes, but you only added/removed a single element
Application Gateway, Load Balancer, NSG, etc. show "all elements changed"
You want to automatically filter false-positive diffs in CI/CD

Background

Terraform's Set type compares by position rather than by key, so when adding or removing elements, all elements appear as "changed". This is a general Terraform issue, but it's particularly noticeable with AzureRM resources that heavily use Set-type attributes like Application Gateway, Load Balancer, and NSG.

These "false-positive diffs" don't actually affect the resources, but they make reviewing terraform plan output difficult.

Prerequisites

Python 3.8+

If Python is unavailable, install via your package manager (e.g., apt install python3, brew install python3) or from python.org.

Basic Usage

# 1. Generate plan JSON output
terraform plan -out=plan.tfplan
terraform show -json plan.tfplan > plan.json

# 2. Analyze
python scripts/analyze_plan.py plan.json

Troubleshooting

python: command not found: Use python3 instead, or install Python
ModuleNotFoundError: Script uses only standard library; ensure Python 3.8+

Detailed Documentation

scripts/README.md — All options, output formats, exit codes, CI/CD examples
references/azurerm_set_attributes.md — Supported resources and attributes

---name: terraform-azurerm-set-diff-analyzerdescription: Analyze Terraform plan JSON output for AzureRM Provider to distinguish between false-positive diffs (order-only changes in Set-type attributes) and actual resource changes. Use when reviewing terraform plan output for Azure resources like Application Gateway, Load Balancer, Firewall, Front Door, NSG, and other resources with Set-type attributes that cause spurious diffs due to internal ordering changes.license: MIT---# Terraform AzureRM Set Diff AnalyzerA skill to identify "false-positive diffs" in Terraform plans caused by AzureRM Provider's Set-type attributes and distinguish them from actual changes.## When to Use- `terraform plan` shows many changes, but you only added/removed a single element- Application Gateway, Load Balancer, NSG, etc. show "all elements changed"- You want to automatically filter false-positive diffs in CI/CD## BackgroundTerraform's Set type compares by position rather than by key, so when adding or removing elements, all elements appear as "changed". This is a general Terraform issue, but it's particularly noticeable with AzureRM resources that heavily use Set-type attributes like Application Gateway, Load Balancer, and NSG.These "false-positive diffs" don't actually affect the resources, but they make reviewing terraform plan output difficult.## Prerequisites- Python 3.8+If Python is unavailable, install via your package manager (e.g., `apt install python3`, `brew install python3`) or from [python.org](https://www.python.org/downloads/).## Basic Usage```bash# 1. Generate plan JSON outputterraform plan -out=plan.tfplanterraform show -json plan.tfplan > plan.json# 2. Analyzepython scripts/analyze_plan.py plan.json```## Troubleshooting- **`python: command not found`**: Use `python3` instead, or install Python- **`ModuleNotFoundError`**: Script uses only standard library; ensure Python 3.8+## Detailed Documentation- `scripts/README.md` — All options, output formats, exit codes, CI/CD examples- `references/azurerm_set_attributes.md` — Supported resources and attributes

Frequently asked questions