Grok Bot

@@ -83,4 +83,4 @@ Adom boards follow the Adom molecule standard, which the first brief left out, s | EMC margin (FCC Part 15 B) | 48.1 dB | 48.1 dB | 48.1 dB | | issues | 9 (1 medium) | 6 (2 medium) | 4 (all low) | -The J4 number was real copper, not a display quirk: the solve log showed /VOUT reaching J4 only through its 0.26 mm back-side ring, with no path to the rest of the net. Grok widened the /VOUT copper at J4 and added vias, and /VOUT then solved as one piece over 89.5 mm². U1 runs warmer because the board has half the copper; it stays inside Grok's 40 °C budget. ERC 0, DRC 0 violations and 0 unconnected, the molecule check passes, all silkscreen is at least 1.0 mm, and every contact is labelled on both faces. Grok still lists two necks worth widening (/GND 18.1 A/mm² beside U1, /VIN 17.0 A/mm² from C4) and four low issues (a ground loop through J2 and J5, no TVS on VIN, EN or VOUT). **A later review found a miss:** Grok's Fields spec loaded only /VIN, /VOUT and /GND, so the switch node was never solved. /SW is one 0.6 mm track, 11.2 mm long, carrying the full inductor current; solved as a 1 A load it peaks at 62 A/mm² and raises a medium current-neck, and the back copper has no GND plane under the switching loop. Grok is reworking both (clip 7). Played on the office GPU at 60 fps. 53 s. [Download](clips/06-molecule.mp4) · [captions](clips/06-molecule.vtt)+The J4 number was real copper, not a display quirk: the solve log showed /VOUT reaching J4 only through its 0.26 mm back-side ring, with no path to the rest of the net. Grok widened the /VOUT copper at J4 and added vias, and /VOUT then solved as one piece over 89.5 mm². U1 runs warmer because the board has half the copper; it stays inside Grok's 40 °C budget. ERC 0, DRC 0 violations and 0 unconnected, the molecule check passes, all silkscreen is at least 1.0 mm, and every contact is labelled on both faces. Grok still lists two necks worth widening (/GND 18.1 A/mm² beside U1, /VIN 17.0 A/mm² from C4) and four low issues (a ground loop through J2 and J5, no TVS on VIN, EN or VOUT). **A miss Grok did not catch: the switch node.** John found it by looking at the board, and had to prompt for it. Grok wrote its own Fields spec with loads only on /VIN, /VOUT and /GND, so the SW net between U1 and L1, the one copper path carrying the full inductor current at 500 kHz, was never solved, and Grok reported "4 low issues" without ever flagging it. /SW was one 0.6 mm track, 11.2 mm long; solved as a 1 A load it peaks at 62 A/mm² and raises a medium current-neck. This is a failure of Grok's engineering judgement (the AI checking Grok's work missed it too); the fix is in clip 7. Played on the office GPU at 60 fps. 53 s. [Download](clips/06-molecule.mp4) · [captions](clips/06-molecule.vtt)