Show HN: Agentic Interface for Mainframes and COBOL

Show HN: Agentic interface for mainframes and COBOL

Hypercubic launched Hopper, an agentic development environment that combines a real TN3270 terminal, z/OS-aware panels for datasets, jobs, and spool output, and an AI agent; sensitive operations require approval, and the terminal remains visible during agent actions.

Why it matters: HKR-H/K/R all pass: the mainframe-agent angle is novel, with concrete TN3270, z/OS, and approval mechanics. Small-vendor Show HN status and missing customer/pricing/results data keep it at the featured floor.