Fruitless

A real leaky integrate-and-fire simulation over the 166,606-neuron MaleCNS graph: membrane voltage v relaxes to -52 mV with a 20 ms membrane time constant, synaptic conductance g decays with a 5 ms constant, spikes fire at -45 mV and trigger a reset plus a 2.2 ms refractory period with a 1.8 ms axonal delay. That earns L1. Not L2: no synapse is ever written. The connectome weight array is read-only inside the integrator (`weights[e]` is only ever read to add to a pending current), and the single intervention in the study is a boolean `blocked` mask that suppresses mAL output for the comparison condition - an optogenetic-style silencing manipulation, not a plasticity rule. There is no learning rule, no dopamine term, and no trained readout anywhere in the repository; the README is explicit that the fly's movement in the visualization is 'illustrative choreography' rather than a model output.