AI Coding Agent Memory & Semantic Change Control

The CICS bucket, measured.

Three CICS transaction programs — COSGN00C, COUSR01C, COACTVWC — ported, independently recompiled, retested, and source-verified this session. This replaces the earlier extrapolation for CICS-online work with real token, time, and defect data.

• 1,500 COBOL lines ported for 646,900 subagent tokens and $4.53-$7.12 total LLM cost.
• 21-33x cheaper per line than Blu Age's stated rate, holding steady with the earlier non-CICS batch.
• A real GnuCOBOL+CICS differential-verification oracle now exists for all 3 programs: 119 of 119 assertions match.
• Independent verification caught a real, shippable defect in effectively every program, including inside the verification tooling itself.