infra-core is a production-grade AWS infrastructure platform built with Terraform 1.7, Ansible, and GitHub Actions. It provisions a complete multi-environment AWS stack — 2-tier VPC, EC2 Auto Scaling Group, RDS PostgreSQL, ALB, SSM-based secrets, CloudWatch observability, and a fully automated CI/CD pipeline using OIDC federation. This article documents the system as built: architecture, module design, security decisions, configuration management, and the cost model that makes it viable for ...