Silicon Atlas 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. Synthetic chip-test records are classified in Calc, then used in five native LabPlot plots. Failed and unknown groups remain visible. The exported operating table contains 573 PASS, 489 FAIL and 9 UNKNOWN groups. The final workbook, plots and exports retain the calculations and units. 00:00:00.000–00:00:03.250 Opening 00:00:03.250–00:00:33.750 01 / Build native formulas 00:00:33.750–00:01:07.375 02 / Construct the first Shmoo 00:01:07.375–00:01:19.625 03 / Duplicate and rebind the hot map 00:01:19.625–00:01:49.625 04 / Build quantitative panels 00:01:49.625–00:02:01.250 05 / Add claim limits and export 00:02:01.250–00:02:06.250 RESULT / ORIGINAL OUTPUT 00:02:06.250–00:02:09.250 Closing