UniversalMigrator

Product Introduction

1. Definition: UniversalMigrator is a legacy code migration triage and analysis tool (GUI & CLI) powered by the Anthropic Claude API. It operates as a pre-migration diagnostic and conversion draft generator, not a complete, production-ready transpiler.
2. Core Value Proposition: It exists to drastically reduce the risk, uncertainty, and upfront cost of legacy codebase migration projects. By automating initial analysis across 113 programming languages (plus custom languages), it scores migration difficulty, identifies risky code constructs, and generates target-language conversion drafts, providing a critical "migration feasibility report" before committing to a full rewrite.

Main Features

1. 113-Language & Custom Language Support: The tool's core engine analyzes and drafts conversions for an extensive list of languages, from modern stacks (Python, Go, Rust) to mainframe and legacy systems (COBOL, PL/I, RPG, VBA, ABAP). How it works: Users specify source and target languages via -s and -t flags (e.g., -s COBOL -t Java). For unlisted languages, the --ext flag allows custom file extension mapping, leveraging the Claude AI's linguistic flexibility to attempt conversion on virtually any text-based language pair.
2. Intelligent Conversion Engine with Claude API: Powered by Claude, the engine goes beyond simple syntax translation. How it works: It injects context (like constants and configuration files converted first) to improve accuracy for subsequent files. It includes an exponential backoff retry mechanism for API errors (429, Timeout, 529), with a resume feature using SHA-256 hashes to manage state, allowing large batch jobs to be restarted from the last checkpoint.
3. Output Sanitization and Ecosystem Conversion: The tool automatically cleans AI-generated outputs, removing Markdown fences and natural language explanations to produce cleaner code files. Furthermore, it performs ecosystem conversion, translating project configuration files like requirements.txt to package.json or other equivalent formats, maintaining project structure integrity.
4. Dual-Mode Interface (GUI & CLI): Offers an 8-language internationalized GUI (Japanese, English, Chinese, etc.) for interactive use, complete with API key input and folder selection. It also provides a full-featured CLI for automation, integration into CI/CD pipelines, and headless batch processing, making it versatile for both one-off assessments and automated workflows.

Problems Solved

1. Pain Point: The initial assessment phase of legacy code migration projects is notoriously expensive, slow, and error-prone. Identifying the true difficulty, risky constructs, and realistic conversion rates for languages like VB6 to Python or SAS to R often requires extensive manual code review.
2. Target Audience: IT Managers and Solution Architects planning multi-language legacy portfolio modernization. SI Vendors and Development Leads needing to create accurate project estimates and PoCs. Developers tasked with migrating niche language combinations not supported by commercial, language-locked tools.
3. Use Cases: Performing a migration PoC for a COBOL or VBA codebase to gauge feasibility and effort. Generating an initial difficulty score and conversion draft for a project bid or RFP. Integrating into a CI/CD pipeline to continuously validate migration steps for a large codebase. Exploring language transition options for technical debt reduction in heterogeneous environments.

Unique Advantages

1. Differentiation: Unlike commercial converters locked to specific pairs (e.g., Oracle-to-PostgreSQL), UniversalMigrator is a language-agnostic triage tool. It does not promise a production-ready transpiled output but instead focuses on delivering actionable intelligence—the "migratability score," risk flags, and a convertible draft—much earlier and more cost-effectively.
2. Key Innovation: The key innovation is the use of a general-purpose Large Language Model (Claude API) as the analysis and conversion engine. This provides unparalleled flexibility to handle the 113+ supported languages and custom combinations, moving beyond the brittle, rule-based systems of traditional migrators. The built-in state management (resume) and output sanitization make it a production-aware tool for handling large-scale codebases.

Frequently Asked Questions (FAQ)

1. What is the difference between UniversalMigrator and a traditional code converter? UniversalMigrator is a migration triage and analysis tool, not a complete, production-ready compiler. Its purpose is to generate an early difficulty score, identify risks, and produce a conversion draft to inform project planning and estimates. Traditional converters aim for a final, compilable output and are typically limited to specific language pairs.

2. How does the "Custom Language" feature work? Can it really convert any language? The tool leverages the Claude AI's inherent understanding of programming syntax. Using the --ext flag (e.g., --ext .cbl,.cob), you can map any file extension to a named source language for the engine. The AI will then attempt to parse and convert it to your chosen target language. This enables support for truly niche or proprietary languages, though conversion success depends on the AI's familiarity with that language's syntax.

3. Do I need an Anthropic API key to use UniversalMigrator? Yes, for its core functionality. The Claude API key is required for the AI-powered analysis and conversion. However, the tool includes a --demo mode that runs a local, offline demonstration using bundled samples to showcase its UI and output features without an API key.

4. What programming languages does UniversalMigrator support? It natively supports 113 programming languages, including major ones like Python, Java, C++, Go, and Rust, plus legacy and mainframe languages like COBOL, PL/I, RPG, VBA, Fortran, and ABAP. The list can be viewed with python main.py --list-languages. Furthermore, it supports any unlisted language via the custom language feature.

5. How is pricing structured for UniversalMigrator? The tool itself is open-source under the MIT License and can be used freely for personal and internal PoC purposes. Costs apply for the Anthropic API usage based on their pricing model. For commercial services like enterprise support, custom prompt engineering, or migration assessment consulting, contact the developer at [email protected].