How I built a CLI tool that generates its own infrastructure configs, manages a full containerised stack, enforces deployment policies through OPA, exposes Prometheus metrics, and produces a live audit trail — all from a single YAML file. Table of Contents The Problem We're Solving Architecture Overview Stage 4A — The Engine The Manifest The Python HTTP Service The Dockerfile The Templates The CLI The Two Deployment Modes Stage 4B — The Eyes and Brain Prometheus Metrics OPA Policy Engine Gated Lifecycle The Status Dashboard The Audit Trail The Debugging Sagas Full Deployment Walkthrough Key Lessons Learned The Problem We're Solving {#the-problem} Every time you spin up a new service in a real DevOps environment, you repeat the same manual work: Write an Nginx config Write a Docker Compose file Run Docker commands Check if things are healthy Hope nobody deploys when the disk is full Hope nobody promotes a canary that's throwing 60% errors SwiftDeploy solves all of this.…