# Engineering guides — Kevadia Innovation Studio

> Practical, opinionated guides on the engineering decisions that compound. https://kevadia.com/guides

- [Modernizing Legacy Government Systems Without the Big-Bang Rewrite](https://kevadia.com/guides/modernizing-legacy-government-systems) — How state and local agencies can retire COBOL and VB6 systems incrementally — using the strangler pattern, parallel runs, and accessibility-first delivery — without a year-long discovery phase or a risky cutover. (markdown: https://kevadia.com/md/guide-modernizing-legacy-government-systems.md)
- [Is Your Enterprise Ready for Production AI Agents?](https://kevadia.com/guides/enterprise-ai-readiness) — A practical readiness check for enterprises: how to tell whether an AI agent will survive production, what an eval harness is, and when to build versus buy. (markdown: https://kevadia.com/md/guide-enterprise-ai-readiness.md)
- [Build vs. Buy: When a Custom Internal Tool Is Worth It](https://kevadia.com/guides/build-vs-buy-internal-tools) — A decision framework for choosing between off-the-shelf SaaS and a custom internal tool — based on workflow fit, integration cost, and how core the process is to your business. (markdown: https://kevadia.com/md/guide-build-vs-buy-internal-tools.md)