Opening the document was the same as opening a promise. The first page bore a single stamp in the lower-right corner: VERIFIED. Under it, a column of small print—revision dates, a terse chain of custody, the faint signature of an engineer who had, in another life, been proud of neat handwriting. The schematic itself was a spiderweb of symbols and notes: resistors clustered like city blocks, capacitors perched like domes, and a central module labeled MV6 that hummed in the center of the diagram with confidence.