Provides comprehensive IBM Mainframe administration, development, and modernization guidance including z/OS operations, JCL scripting, COBOL/PL/I programming, CICS/IMS configuration, DB2 administration, TSO/ISPF usage, system programming, batch processing, and mainframe-to-cloud migration strategies. Covers mainframe security (RACF, ACF2), performance tuning, capacity planning, disaster recovery, and DevOps integration. Use when working with mainframe systems, z/OS, JES2/JES3, VTAM, USS, or when users mention "mainframe", "z/OS", "MVS", "TSO", "ISPF", "JCL", "CICS", "IMS", "DB2 mainframe", "VSAM", "RACF", "mainframe modernization", "legacy mainframe", or "IBM z Systems".
Comprehensive guidance for IBM Mainframe (z/OS) administration, development, operations, and modernization. Covers system programming, application development, middleware configuration, database management, and migration strategies for mainframe environments.
Choose your task and load the appropriate reference:
For detailed syntax, examples, and procedures, load the appropriate reference file:
For complete development procedures, compile JCL, version control integration, and testing strategies, load cobol-programming.md.
Typical development cycle:
Modern development approaches:
For comprehensive migration guidance, assessment procedures, and specific migration patterns, load mainframe-modernization.md.
Key approaches:
Integration options:
For detailed procedures, load the appropriate reference file.
For detailed tool usage, configuration, and examples, load the appropriate reference file.
For detailed troubleshooting procedures, load the appropriate reference file.
When analyzing or documenting mainframe systems, provide:
For specific output formats and templates, load the appropriate reference file.
For specific tasks, load the relevant reference file from the Quick Start Guide above. Each reference provides detailed procedures, commands, examples, and troubleshooting guidance for that specific area of mainframe operations.