Legacy and Mainframe Code Conversion using GitHub Copilot

Capgemini’s Mainframe Code Conversion Journey enables organizations to modernize legacy mainframe applications by leveraging GitHub Copilot for:

-Extracting business rules from mainframe code ~40% faster than traditional approaches. -Generating UI (ReactJS) and API (Spring Boot) code, even for developers with no prior knowledge, reducing development effort by 70%. -Automating unit test case creation, achieving 90% automated test coverage for APIs. -Reducing SME dependency by 50%, as GenAI clarifies routine business rules with minimal manual intervention. -Enhancing DevOps automation through GitHub Copilot-generated OpenAPI specs, build scripts, and deployment pipelines.

This solution drives increased adoption of Microsoft products such as:

-Azure DevOps & GitHub – Integrated CI/CD for mainframe-to-cloud transformation. -Microsoft Excel – Exporting legacy system insights for analysis. -VS Code – Optimized GenAI-driven development with Copilot integration.

Project Deliverables:

-Automated Code Extraction from COBOL, JCL, Copybooks using GitHub Copilot. -GenAI-driven UI & API Code Generation with ReactJS (UI) and Spring Boot (API). -Automated Unit Test Case Generation (~90% test coverage). -Code Refactoring & Consolidation for efficient modernization. -DevOps Automation via OpenAPI specs, build scripts, and containerization. -Legacy System Analysis & Documentation using AI-assisted prompts.

Duration: Ongoing implementation with the ability to scale based on enterprise modernization needs.

Technologies Involved: GitHub Copilot Microsoft Azure DevOps ReactJS & Spring Boot