Commonwealth Bank has introduced the CBA Lumos AI accelerator to transform how applications are prepared for the cloud. The system is designed to streamline migration, cut down lengthy manual processes, and enable a greater number of applications to move onto modern platforms within shorter timeframes.
With Lumos, the bank has begun using automation in assessment, code remediation, documentation, and deployment. At the same time, human oversight remains central, ensuring each step meets compliance and operational standards. This balance is seen as vital in supporting the bank’s broader digital transformation agenda.
Building an AI-First Migration Framework
The CBA Lumos AI accelerator is described as an “AI-first” multi-agent system that manages complex workflows in the migration process. Each intelligent agent performs specialised functions such as code analysis, architectural review, document preparation, and final deployment.
Instead of teams working through repetitive manual reviews, the system enables agents to generate artifacts that are validated before being progressed. The approach divides tasks into modular steps, creating a predictable structure that can be scaled across large application portfolios.
Reducing Long Assessment Timelines
Cloud readiness assessments within the bank were previously taking more than six weeks per application. Using Lumos, these assessments can now be completed in a fraction of the time through automated scanning of codebases and dependencies.
Agents not only identify issues but also draft architectural diagrams and security documents. A dedicated writing agent produces application documentation aligned with Commonwealth Bank standards. Outputs are refined iteratively by a validator agent before final submission, saving weeks of manual effort.
Automating Code Refactoring and Security Reviews
One of the core elements of AI-driven cloud migration tools, such as Lumos, is automated code transformation. Commonwealth Bank has integrated technologies such as OpenRewrite and AWS Q Developer CLI, enabling one agent to refactor code while another reviews and corrects errors.
Security also plays a role in the automated workflow. Lumos generates detailed security diagrams and compliance documentation, which are validated against regulatory requirements. These steps ensure that migration does not compromise governance or operational safety, even when processes are accelerated.
Increasing Throughput Across the Bank
Before the adoption of Lumos, Commonwealth Bank was migrating only about ten applications in a year. With the new system, throughput has increased substantially, reaching 20 to 30 applications per quarter.
The acceleration is particularly relevant as the bank has identified 370 legacy applications suitable for modernisation. By embedding automation, the bank has reduced bottlenecks and improved predictability, creating a more reliable path to scale its migration program.
Collaboration and Technical Enhancements
Development of Lumos has involved collaboration with AWS Professional Services. Together, engineers aligned the bank’s requirements with the AWS migration framework while maintaining internal compliance standards.
To further optimise orchestration, Commonwealth Bank is transitioning from Pydantic to AgentCore for more efficient management of agents. Engineers are also using a visual design interface on the bank’s DevOps Hosting Platform to allocate resources while ensuring all architectural and compliance requirements are met.
Managing Complex Legacy Applications
While the system has achieved early success, work continues to improve its handling of large and complex codebases. Teams are enhancing testing coverage, scaling orchestration layers, and refining performance so the system can manage demanding workloads across the bank’s portfolio.
By making the process modular and repeatable, Lumos is expected to play an expanding role in managing legacy modernisation, particularly as the bank continues its program of cloud adoption across critical applications.
Final Thoughts
The introduction of the CBA Lumos AI accelerator marks a major step in the Commonwealth Bank AI cloud migration strategy. Through automated assessment, remediation, documentation, and deployment, the bank has moved from a limited migration capacity to a scalable program capable of managing dozens of applications each quarter.
By combining automation with governance, Lumos is supporting Commonwealth Bank in building a more agile and cloud-ready technology environment. The system represents a shift towards structured, large-scale migration using AI-driven processes that remain under clear human supervision.
FAQs – Commonwealth Bank AI Cloud Migration with Lumos
- What is the CBA Lumos AI accelerator?
The CBA Lumos AI accelerator is an AI-driven platform developed by Commonwealth Bank to automate and streamline the migration of applications to cloud environments. It handles tasks such as code analysis, documentation, remediation, and deployment through intelligent agents. - How does Lumos improve the cloud migration process?
Lumos reduces manual effort by automating time-consuming steps like readiness assessments, documentation, security reviews, and code transformation. This allows applications to be prepared and deployed more efficiently while maintaining human oversight for quality and compliance. - How many applications can Commonwealth Bank migrate using Lumos?
Before Lumos, the bank migrated about 10 applications per year. With Lumos in place, it can now migrate between 20 and 30 applications per quarter, significantly increasing its migration capacity. - Does Lumos replace human involvement in migration?
No. Lumos uses AI agents to perform repetitive tasks, but humans remain involved in validating outputs, reviewing changes, and approving final deployments, ensuring compliance and operational standards are met. - What technologies are integrated into Lumos?
Lumos incorporates tools such as OpenRewrite and AWS Q Developer CLI to support code refactoring and remediation. It also uses multi-agent orchestration to manage workflows efficiently. - What are the future plans for Lumos?
Commonwealth Bank is enhancing Lumos to handle larger and more complex legacy applications. Efforts are ongoing to improve scalability, testing coverage, and orchestration for broader use across its application portfolio. - Who collaborated with Commonwealth Bank on Lumos?
The development of Lumos was carried out in collaboration with AWS Professional Services, adapting AWS’s migration framework to meet the bank’s internal compliance and operational needs.
