Terraform Plan as a Pull Request Comment in GitHub Actions

This article provides a step-by-step guide on automating Terraform plan execution within GitHub Actions and posting the output as a comment on pull requests. It emphasizes the importance of reviewing infrastructure changes before merging, explains how to set up OIDC-based authentication between GitHub and Azure without long-lived secrets, and covers the necessary prerequisites like Azure subscription, storage account, and federated credentials. The guide aims to improve code review processes for infrastructure by ensuring reviewers see exactly what will change, reducing the risk of accidental destruction.