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Copilot AI commented Jan 15, 2026

Created Product Requirements Document for migrating AS/400 COBOL inventory management system to Java 18, following the structure defined in program-prd.prompt.md.

Scope

Analyzed 8 COBOL programs in AS400/QCBLLESRC:

  • STAOBR family (STAOBR, STAOBR2, STAOBR_2) - Material inventory updates with sequential/indexed file processing
  • STAPOR - Ordering logic
  • TABULKY1/2 - Array/table operations
  • COND1 - Conditional logic patterns
  • DUMP_FULL - Debug utilities

PRD Structure (AS400/QCBLLESRC/prd_spec.md)

  • Problem Statement: Legacy platform dependencies, limited integration, scalability constraints
  • Requirements: 6 functional categories (FR1-FR6), 7 non-functional (NFR1-NFR7) covering JPA migration, REST APIs, cloud deployment
  • User Stories: 6 personas from batch operators to integration developers
  • Timeline: 24-week phased approach across architecture, migration, testing, deployment
  • Risks: 8 identified with mitigation strategies (performance, data integrity, knowledge transfer)

Key Technical Translations

  • File-based storage (STAVY, OBRATY) → JPA/Hibernate with relational DB
  • Sequential/indexed access patterns → Repository pattern with batch optimization
  • MOVE CORRESPONDING → Java object mapping frameworks
  • 88-level conditions → Enum-based validation

Document provides foundation for functional equivalence while enabling cloud-native deployment and modern integrations.

Original prompt

implement this.

[Chronological Review: The conversation began with the user requesting to follow instructions in a specific prompt file. The user then asked to proceed with the task, followed by a request to rewrite the Product Requirements Document (PRD) for a migration from COBOL to Java 18. Finally, the user requested implementation of this rewrite.]

[Intent Mapping:

  1. "Follow instructions in [program-prd.prompt.md]": The user wanted to initiate a task based on the contents of the specified prompt file.
  2. "please proceed": The user was indicating readiness to move forward with the task.
  3. "please rewrite the PRD for a rewrite to Java 18": The user requested a specific rewrite of the PRD to facilitate migration from COBOL to Java 18.
  4. "implement this": The user asked for the implementation of the rewritten PRD.]

[Technical Inventory:

  • Repository: Cobol-Demo
  • Current Branch: master
  • Default Branch: master
  • Technologies: COBOL, Java 18
  • Purpose: Migration of an application from COBOL to Java 18 based on analysis and reports.]

[Code Archaeology: No specific code files or functions were discussed in detail, but the focus was on the PRD document related to the migration process.]

[Progress Assessment:

  • Completed Tasks: User has provided context and specific requests for the PRD rewrite.
  • Partially Complete Work: The actual rewriting and implementation of the PRD for Java 18 migration is pending.]

[Context Validation: All necessary context for continuing the work on the PRD rewrite and migration to Java 18 is captured.]

[Recent Commands Analysis:

  • Last Agent Commands: The user requested to rewrite the PRD and implement it.
  • Tool Results Summary: No specific tool results were generated as the conversation focused on user requests rather than tool executions.
  • Pre-Summary State: The agent was actively working on the user's request to rewrite the PRD for migration to Java 18 when the token budget was exceeded.
  • Operation Context: The commands were executed to align with the user's goal of migrating the application from COBOL to Java 18, utilizing the analysis and reports collected.]
1. Conversation Overview: - Primary Objectives: - "Follow instructions in [program-prd.prompt.md]" - "please rewrite the PRD for a rewrite to Java 18." - "implement this." - Session Context: The conversation involved the user directing the agent to follow a prompt, then requesting a rewrite of the PRD to facilitate migration from COBOL to Java 18, culminating in a request for implementation. - User Intent Evolution: The user moved from initiating a task based on a prompt to specifying the need for a PRD rewrite and implementation for a migration project.
  1. Technical Foundation:
  • Repository: Cobol-Demo
  • Current Branch: master
  • Default Branch: master
  • Technologies: COBOL, Java 18
  1. Codebase Status:
  • File Name: program-prd.prompt.md
  • Purpose: To provide instructions for the PRD rewrite.
  • Current State: User has requested to follow the instructions within this file.
  • Key Code Segments: Not applicable as no specific code segments were discussed.
  • Dependencies: The PRD rewrite is dependent on the analysis and reports collected for the migration.
  1. Problem Resolution:
  • Issues Encountered: None explicitly mentioned.
  • Solutions Implemented: User's requests for rewriting and implementing the PRD.
  • Debugging Context: No ongoing troubleshooting efforts were noted.
  • Lessons Learned: The importance of clear directives for project migration.
  1. Progress Tracking:
  • Completed Tasks: User has articulated the need for a PRD rewrite.
  • Partially Complete Work: The actual rewriting and implementation of the PRD is pending.
  • Validated Outcomes: No features or code have been confirmed working as the focus was on documentation.
  1. Active Work State:
  • Current Focus: Rewriting the PRD for migration to Java 18.
  • Recent Context: User has been providing directives for the PRD rewrite and implementation.
  • Working Code: Not applicable as the focus is on documentation.
  • Immediate Context: The user was addressing the need for a PRD rewrite for Java 18 migration.
  1. Recent Operations:
  • Last Agent Commands: User requested to rewrite the PRD and implement it.
  • Tool Results Summary: No specific tool results were generated.
  • Pre-Summary State: The agent was actively working on the PRD rewrite when the token budget was exceeded.
  • Operation Context: The commands were executed to align with the user's goal of migrating the application from COBOL to Java 18.
  1. Continuation Plan:
  • Pending Task 1: Rewrite the PRD for migration to Java 18 based on collected analysis.
  • Pending Task 2: Implement the rewritten PRD.
  • Priority Information: The PRD rewrite is the most urgent task.
  • Next Action: Immediate next step is to begin the PRD rewrite as per user instructions.

Created from VS Code.


💡 You can make Copilot smarter by setting up custom instructions, customizing its development environment and configuring Model Context Protocol (MCP) servers. Learn more Copilot coding agent tips in the docs.

Co-authored-by: raykao <860691+raykao@users.noreply.github.com>
Copilot AI changed the title [WIP] Rewrite PRD for migration from COBOL to Java 18 Add PRD for COBOL to Java 18 migration Jan 15, 2026
Copilot AI requested a review from raykao January 15, 2026 05:40
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2 participants