Add COBOL codebase analysis documentation for modernization planning - #209
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…ap, hotspot report Static analysis of the entire CardDemo COBOL mainframe codebase producing four comprehensive documentation artifacts for modernization planning: - APPLICATION_INVENTORY.md: Catalogs all 44 programs, 41 copybooks, 42 JCL jobs, 21 BMS maps, and assembler modules with classifications - DATA_DICTIONARY.md: Extracts 16 business entities from copybook PIC clauses with data types, lengths, and PII/PCI sensitivity annotations - DEPENDENCY_MAP.md: Call graph (XCTL/CALL), file access matrix, JCL job sequencing, and batch data flow diagrams - HOTSPOT_REPORT.md: Top 10 modules ranked by complexity, risk, and business impact with migration sequencing recommendations
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- COBOL Programs (Core): 30 → 31 (17 online + 14 batch) - Copybooks (Optional): 13 → 11 (9 Auth/IMS/MQ + 2 DB2) - BMS Copybooks: 19 → 21 (17 core + 4 optional) - JCL Jobs (Core): 34 → 38 (17 data mgmt + 13 batch + 8 utility) - Total: 174 → 179
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Summary
Adds four comprehensive markdown documents under
docs/from static analysis of the entire CardDemo COBOL codebase — intended to orient modernization planning before any code migration begins.What was analyzed: 44 COBOL programs (25 online CICS + 19 batch), 41 copybooks, 42 JCL jobs, 21 BMS maps, 2 assembler modules, across core + 3 optional modules (Auth/IMS/MQ, Tran Type/DB2, VSAM-MQ).
Documents produced:
APPLICATION_INVENTORY.md— Complete catalog of every artifact with classifications by processing mode (online/batch), business domain, technology stack (VSAM/DB2/IMS/MQ), and optional module membership.DATA_DICTIONARY.md— All 16 business entities extracted from copybook PIC clauses: Customer, Account, Card, Transaction, etc. Each field includes COBOL PIC clause, Java-equivalent type, byte length, and business description. Includes PII/PCI sensitivity annotations (SSN, card numbers, plaintext passwords) and an entity relationship diagram.DEPENDENCY_MAP.md— Three views of program dependencies:HOTSPOT_REPORT.md— Top 10 modules ranked by composite score (complexity 40%, risk 35%, business impact 25%). Key findings:COACTUPC(feat: Modernize COBOL CBACT01C batch program to Java 17+ #1, 4,236 LOC, 51 GO TOs, 58 copybook includes) is the dominant hotspotCOPAUA0C(feat: Modernize CBACT01C COBOL batch program to Java 17+ #6) has the highest technology diversity (CICS + IMS + MQ simultaneously)CBSTM03A(feat: Phase 0 + Phase 1 Java 17 migration of COBOL CardDemo batch programs #9) uses obsoleteALTER ... PROCEED TOdynamic GO TONo source code was modified."
Link to Devin session: https://partner-workshops.devinenterprise.com/sessions/f2ec55ddb4014b7295f02562fccbad5c
Requested by: @DhrovS