The Bandwidth Protocol is not a self-help book. It does not persuade, motivate, or console. It registers what persists when observation operates under constraint. Organized into 35 protocols across four volumes, this work documents bounded intelligence under finite sampling capacity-from why Maria updates her dead son's calendar (null participant retention) to when systems must terminate their own operations (observer self-termination). Drawing from predictive processing, active inference, and systems theory, it presents a radically non-normative methodology that accepts finitude rather than transcends it. The protocols do not build toward conclusions. They stabilize locally. The work terminates when sampling cost exceeds information yield. No summary is provided. What persists does so without further reference. For systems engineers, cognitive scientists, organizational designers, and readers who found conventional philosophy unsatisfying. This book does not claim universality, completeness, or truth. It persists only within the bandwidth in which it is registered.