
Can AI Understand a Codebase With 15 Years of History?
Millions of lines, hundreds of tables, dozens of integrations: what AI grasps in hours, where it fails, how teams deploy RAG and repo indexing, and why expert + model beats either alone.

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Millions of lines, hundreds of tables, dozens of integrations: what AI grasps in hours, where it fails, how teams deploy RAG and repo indexing, and why expert + model beats either alone.

Why systems die from early architectural decisions, not outdated tech — and how to design for change, not features: module boundaries, domain modeling, data, ADRs, and a decade-long checklist.