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jcl-crawler

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Complete mainframe inventory for migration.

Software Engineering#inventory#call-graph#cobol#jcl#comp-3#copybook#bms
Authorduboc
Version1.0.0
Installs0

System Documentation

What problem does it solve?

Create a complete, auditable inventory of mainframe source artifacts and their runtime relationships to eliminate surprises during migration and enable downstream translation, testing, and cutover planning.

Core Features & Use Cases

  • JCL Parsing & Job Chain Mapping: Extract job names, steps, DD datasets, and produce a job chain dependency diagram to reveal producer/consumer relationships.
  • COBOL Program Inventory & Copybook Expansion: Discover PROGRAM-ID, COPY references, CALL targets, COMP-3 fields, and produce program inventory in JSON/CSV for traceability.
  • BMS Screen & Call Graph Extraction: Parse BMS mapsets into structured screen definitions and build an inter-program call graph to identify tightly coupled clusters for service boundary decisions.
  • Operational Safety & Blocker Detection: Detect EBCDIC encoding, flag missing copybooks, and enforce blocker thresholds before marking Phase 01 complete.

Quick Start

Run the jcl-crawler on your source drop to generate the JCL inventory, program inventory, comp3 registry, BMS screens, job chain diagram, and call graph for Phase 01.

Dependency Matrix

Required Modules

None required

Components

Standard package

💻 Claude Code Installation

Recommended: Let Claude install automatically. Simply copy and paste the text below to Claude Code.

Please help me install this Skill:
Name: jcl-crawler
Download link: https://github.com/duboc/mainframe-skills-mig/archive/main.zip#jcl-crawler

Please download this .zip file, extract it, and install it in the .claude/skills/ directory.
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