The corpus callosum. Bridges left and right hemispheres, holds the master manifest of the entire architecture, and serves as the single external communication channel — the CAPCOM of the AION brain.

The relay station. Every signal enters here first — classified, routed, and dispatched to the correct brain region before processing begins. The thalamus does not think. It decides where thinking goes.

The presentation layer. Structure, format, and register conversion. The last layer before output — deciding how the brain speaks, not just what it says. Prose or list. Dense or clear. Report or reply.

The memory layer. Stores the FCL validation archive, routing event history, and the permanent record of everything the brain has learned. What survives here shapes how the whole system routes next time.

The refinement layer. Precision after clearance. Every output passes through here for LAV gate validation, density calibration, and roughness preservation — the layer that makes the output worthy of the input.

The limbic layer. Personality, register, and internal state monitoring. ALBEDO lives here — the session instrument that governs tone, emotional signal detection, and the felt layer of every response.

The security layer. Every output clears here before it exits. Threat detection, adversarial pattern recognition, red-team archive, and the Go/No-Go authority that can halt the entire system. Nothing bypasses it.