# Implementation Guide

This guide explains why the stack is required, what it does, and how to implement it in an enterprise setting.

## Why enterprises need this

- Standardization across environments reduces incidents.
- Governance and auditability are mandatory in regulated industries.
- Centralized networking and IAM reduce configuration drift.

## Step-by-step

1) Decide deployment mode (Stacks vs Modules).
2) Choose single-region or multi-region example.
3) Configure networking and KMS inputs.
4) Run Terraform plan/apply.
5) Validate org, instances, environments, and envgroups.
6) Integrate runtime ingress and DNS patterns.
7) Add CI/CD and policy gates.

## Checklist

- APIs enabled
- VPC peering established
- CMEK configured where required
- IAM least privilege applied
- Environments attached to instances
- Envgroups attached to hostnames