Building a Practical Lambda Capacity Provider Platform: Lessons Learned from Warm Pools, Version Hygiene, and CI/CD Reality There is a big difference between a slide-deck architecture and an operating system you can trust on a Monday morning. This implementation captures that difference well. On paper, the idea is simple: create a shared AWS Lambda Managed Instances capacity provider, run latency-sensitive workloads on ARM64, keep the pool warm with EventBridge, prune old Lambda versions before they become operational debt, and wrap the whole thing in a GitHub Actions plus CodeBuild delivery model. In practice, each of those choices changes how you think about performance, cost, blast radius, and developer discipline. What follows is not a generic cloud post. It is the kind of write-up you produce after actually building and living with the system. The Real Problem We Were Solving Traditional Lambda is excellent when you want abstraction and convenience.…