Sun* Launches "Regen*," a Modernization Solution Utilizing Its Proprietary AI Agent Engine

Sun Asterisk Inc. (Headquarters: Chiyoda-ku, Tokyo; Representative Director: Taihei Kobayashi; hereinafter "Sun*") has launched "Regen*" (pronounced "Regen"), a modernization solution that supports the safe and reliable renewal of legacy systems by leveraging its proprietary AI agent framework, "Sun* Takumi."

This solution is an AI-driven renewal process that accurately executes "specification restoration," "code translation," and "parity testing to compare the equivalence of new and old systems," which have traditionally been difficult to automate. By implementing the strict engineering discipline that Sun* excels at, it strongly supports companies' digital transformation and sustainable business growth without losing any of the unique specifications or rules of currently operating systems.

Through "Regen*," Sun* aims to contribute to companies' sustainable growth and business updates by supporting the visualization of black-boxed system assets and phased modernization, thereby inheriting them to the next generation while maintaining business value.

Background of Development

Legacy systems, which many companies currently face, generate enormous costs simply for maintenance due to increasing security risks, difficulty in securing rare talent familiar with old technologies, and declining development speed.

However, "big bang" type renewals that attempt to overhaul systems all at once carry a high risk of failure, and many projects have stalled in reality.

The biggest cause of system renewal failures is the oversight of complex business rules and unique specifications that have become black boxes through years of operation, leading to an inability to correctly migrate the meaning and value of existing systems. Furthermore, code conversion using a single generative AI tool, which has been a recent trend, has been insufficient to maintain the context of the entire system and has made it difficult to uphold the strict discipline required for enterprise quality.

To solve these challenges, Sun* has developed "Regen*," a predictable and risk-minimizing modernization solution that fuses the overwhelming "speed" of AI with the "discipline" of strict engineering.

Three Core Values Provided by "Regen*"

"Regen*" is an AI-driven modernization process that connects current operating systems to the next generation without losing any of their value. By fully utilizing Sun*'s proprietary AI agent framework, "Sun* Takumi," it achieves safe and cost-effective system renewal through the following three approaches:

Automatic Document Restoration and Fundamental Prevention of "Re-Legacification"

Before rewriting code, documents are extracted with high accuracy from existing sources and visualized in Markdown format. A development process is established where these documents are continuously updated with AI assistance, and the AI automatically generates source code and test cases from these specifications. By keeping the documents as the Single Source of Truth and up-to-date, the re-black-boxing of systems is fundamentally prevented.

Strict Parity Testing and Proactive Trouble Avoidance

Test cases are automatically generated based on the restored specifications to confirm that the behavior of the new and old systems completely matches. By applying strict acceptance gates based on measurement rather than human assumption, and Sun*'s proven "Migration Playbook," troubles such as performance degradation are avoided.

3-Phase Reversible Process and Compound Acceleration

The migration process is divided into three phases: "Assessment," "Pilot," and "Rolling Renewal." Each step has clear review gates, ensuring a safe design where the project can be rolled back at any time. Furthermore, as project-specific knowledge is accumulated by the AI, the module migration speed in the latter half compounds and accelerates to approximately three times the initial speed.

About the AI Agent Engine "Sun* Takumi"

This is a proprietary AI engine that fundamentally supports the "Regen*" process. Unlike simple code replacement tools, it functions as a platform for automating and reproducing engineering discipline, possessing the following three unique know-hows and strengths:

Autonomous Cooperative Operation by 15 Specialized Agents, Including Security-Focused Ones

A system is built where 15 specialized sub-agents, such as security and testers, cooperate autonomously. Possessing over 55 advanced skills in total, they perform real-time code reviews, vulnerability analysis, unit testing, and code refactoring on generated code, continuously ensuring the quality, reliability, and safety required for enterprise development.

Construction of a "Knowledge Graph" that Preserves Semantic Connections

Instead of simple text search, a "Knowledge Graph" is internally constructed that preserves the structure of source code and business rules as semantic connections. This enables accurate specification restoration and code generation that does not break the context of the entire system, even for incomplete documents or black-boxed areas.

Equipped with a "Memory Layer" that Retains Decision-Making History

It is equipped with a dedicated "Memory Layer" that retains the history and background of past design and development decisions. This completely prevents the loss of context and runaway behavior in long-term projects, which is a weakness of AI, and maintains high consistency by eliminating the risk of critical rework that often occurs in linear development.

Inquiries regarding this service https://sun-asterisk.com/service/development/regen/

About Sun*

Company Name: Sun Asterisk Inc.

Location: Otemachi Building B1F, 1-6-1 Otemachi, Chiyoda-ku, Tokyo

Representative: Taihei Kobayashi, Representative Director

Year Founded: 2013

Business Activities: Digital Creative Studio Business

URL: https://sun-asterisk.com/