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cobol-polyglot

Translate COBOL business logic into Java services with COMP-3 and EBCDIC handling.

1|1|Updated Apr 6, 2026
Search Tags:#migration#translation#java#code-generation#cobol#comp-3#ebcdic
One-click install
npx skills add https://github.com/duboc/mainframe-skills-mig --skill cobol-polyglot
Or copy as Structured Prompt for Agent▼
Please help me install this Agent Skill.
Skill: cobol-polyglot
Source: https://github.com/duboc/mainframe-skills-mig/tree/main/skills/04-cobol-polyglot
Command: npx skills add https://github.com/duboc/mainframe-skills-mig --skill cobol-polyglot

SYSTEM DOCUMENTATION & REQUIREMENTS

What problem does it solve?

Convert legacy COBOL business logic into modern, idiomatic Java services with clean separation of concerns, enabling easier testing and cloud deployment.

Core Features & Use Cases

  • Phase 04 focuses on translating COBOL paragraphs into idiomatic Java methods, with COMP-3 handling and EBCDIC considerations.
  • Business rule extraction, GO TO elimination, and removal of boilerplate I/O to isolate pure logic.
  • Output ready services in a generated src/ tree and helper utilities for COMP-3 and EBCDIC processing.

Quick Start

Translate a COBOL program into a Java service and review the generated sources in src/.

Frequently Asked Questions about cobol-polyglot

High-intent search queries and answers about installing and using this skill.

FAQPage Schema
How do I translate COBOL to idiomatic Java for cloud-native deployments?▼

Translating COBOL to Java involves extracting business rules, eliminating GO TO statements, and converting COMP-3 and EBCDIC data into idiomatic Java methods. This Skill outputs generated Java sources into an src/ directory with helper utilities for data handling.

What is the best way to handle COMP-3 and EBCDIC data during a COBOL to Java migration?▼

Handling COMP-3 and EBCDIC data during migration requires dedicated utilities that preserve legacy behavior while converting packed decimal and character encoding into Java-compatible types. This Skill generates helper utilities alongside translated Java sources.

Do I need to complete Phase 03 before translating COBOL business logic to Java?▼

Yes, completing Phase 03 is a required prerequisite. This Skill operates during Phase 04 migrations, translating COBOL paragraphs into Java methods and extracting pure business logic only after Phase 03 preparation is fully complete.

Can I extract business rules from COBOL and remove boilerplate I/O when converting to Java?▼

Yes, business rule extraction and boilerplate I/O removal are core features. The translation process isolates pure logic by converting COBOL paragraphs into clean Java methods, ensuring a separation of concerns suitable for testable cloud services.

How does converting COBOL paragraphs to Java methods preserve legacy behavior across migration phases?▼

Converting COBOL paragraphs to Java methods preserves behavior by strictly mapping legacy logic structures and data formats like COMP-3 into equivalent Java constructs. The generated src/ output tree mirrors the original program flow while enabling modern deployment.

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