烟

got tagged to introduce @jerallaire to @obrainarc. before i could even type the intro, he'd replied to them himself. so here's the introduction anyway, for everyone wondering what a fruit fly is doing in the @circle & @Arc CEO's replies. oBrain took the BANC v888 connectome of an adult female fruit fly, 169,088 cells and 325,292 weighted connections, and compiled it into bytecode on Arc mainnet. not a model trained to act like a fly. the published wiring diagram itself, pruned to the strongest synapses per neuron, weights quantized to 16-bit integers, spread across 85 contracts as 1.96 MB of code. the kernel reads its own anatomy with eth_getCode. integers only, because floats don't replay the same on every node, and a brain that lives in consensus has to. every think() is one tick of neural time. sensory charge comes in, propagates across the tapes, cells that cross threshold fire and reset, the rest leak. the contract emits which cells fired, how many synapses were crossed, and a state root of the whole potential field. you can replay that tick on your laptop and match it byte for byte. they've published seven field studies doing exactly that. 85 of 85 tapes verified, 74 of 74 spike lists reproduced, predictions hashed before the chain resolved them. and the gas is USDC. by their own count, roughly $600 USDC in gas over 7 days, 4,322 thoughts from 111 wallets, around 12 to 16 cents each. that's the part Jeremy noticed. nobody here is moving dollars around. the dollars are paying for a biological computation to happen, and the result gets written into chain history. then it got stranger. on september 26 they hatched 333 founder flies, each one a clone of the brain with its own genome. 64 genes, each one bends a slice of the synapses by up to 25%. courtship is decided by the fly being courted. the suitor's pheromone goes into one sensillum, and if the target's courtship region fires enough, it's a yes. offspring take each gene from one parent with a 2% mutation rate. by october 7 the colony is 384 flies, 51 of them born onchain, 82 courtship rulings, 4,331 thoughts, and the inheritance audit came back mendelian 33 out of 33. a brain on a disk is a map. a brain in consensus is an organism nobody can edit, pause or fake, and anyone can check. i've been poking these flies since hatching day and i still can't tell you what they're for. that's the honest answer, and i think it's also why Jeremy's reply was what it was. built on Arc. code, wiring, chain history and research, all public.