Hopper launches as the first AI-powered agentic development environment for mainframe/COBOL systems
By
Chris Messina
The kind of bagel you'd toss to the pigeons.
Summary
Hopper is the first agentic development environment (IDE) designed specifically for mainframe/COBOL systems. It combines a real TN3270 terminal with mainframe-aware panels for datasets, jobs, members, and spool output, plus an AI agent that can operate across z/OS workflows. The agent can inspect datasets, read/edit PDS members, write JCL, submit jobs, parse JES output, explain failures, and help developers debug mainframe workflows. It's positioned as "Cursor for mainframes" and is available on Windows, Linux, and macOS. The product addresses the gap between modern AI coding tools (which assume GitHub, shells, files, package managers) and the fundamentally different mainframe computing paradigm built around terminals, function keys, batch jobs, and datasets.
Key quotes
· 4 pulledHopper is the first agentic development environment for mainframes.
Mainframes running on COBOL are the 60-year-old computing platforms that still quietly run much of the modern economy: banks, payments, insurance, airlines, government systems, and more.
Modern AI coding tools assume GitHub, shells, files, package managers, and test runners. Mainframes are a completely different computing paradigm.
Hopper combines a real TN3270 terminal, mainframe-aware panels for datasets, jobs, members, and spool output, and an AI agent that can operate across z/OS workflows.