Modernizing COBOL Without the Cloud: How Gemma 4 Tackles Legacy Mainframe Code Offline

Enterprise compliance restrictions make cloud-based code analysis a non-starter for sensitive COBOL systems, but running Gemma 4 locally through Unsloth optimization proves that offline AI agents can effectively modernize legacy mainframes without sacrificing security or breaking budgets. This approach demonstrates that combining open-source models with custom parsing logic creates a viable alternative to expensive enterprise transformation tools. For teams managing aging financial and healthcare systems, this opens a path to modernization that passes regulatory scrutiny while keeping data completely on-premises.