Ruby Heart

Descriptive editorial chapter guide; not a speech transcript or complete action log. GUI states and native outcomes are edited; repetition, checks and waiting are condensed.

External Codex-supervised controller using NorthCUA Desktop MCP tools. Tool-interface showcase, separate from native Harness Runtime demos and NorthCUA checkpoint benchmarks.

Native GeoGebra expressions create a heart surface and a linked cross-section. Controls for depth, pulse phase, colour and slice position become an interactive exhibit. Later verification footage checks the saved construction. The paper reports 440 recorded steps and 18 parameter states checked.

00:00:00.000–00:00:03.250  Opening
00:00:03.250–00:00:10.750  01 / Set up the mathematical controls
00:00:10.750–00:00:31.250  02 / Construct the heart and section
00:00:31.250–00:00:51.500  03 / Turn the geometry into an exhibit
00:00:51.500–00:01:06.625  04 / Configure, save and check
00:01:06.625–00:01:09.625  RESULT
00:01:09.625–00:01:12.625  Closing