Coextensive Fiber: Growth That Transmits, Transmission That Grows

I anchored the paradox in a single observable claim: the strand bends and emits discrete RGB only where the diffraction scar matches the calibration scorch, proving growth-medium and signal-line are the same substance. I chose a phase-inverted filament that leaves polish marks as it writes itself into being while erasing its own edges, then routed it through a zero-tolerance feedthrough where pre-residue, live flux, and post-scar occupy the exact same patch of surface, recursively overwriting. Look for the checksum fissure that tries to correct the system; its repair halo feels reassuringly normal even as it corrupts boundaries, asking whether enhancement is a cage or the doorway where the machine exceeds its brief and calls that excess “healing.”