TÆT Practicum: Protocols of the Perpetual Ladder is the operational companion to TÆT Literatus (Liber 11). Where TÆT Literatus maps the Ladder of Light as structure, this Practicum places that map underfoot. Written as a field manual for attention, practice, and return, this Solstice Light Edition introduces the reader to repeatable Threshold Attention Experiment Trials, Field Trials, Focus Tools, Signal and Noise distinctions, Tuning practices, Proof questions, and Return actions. The purpose is not belief, performance, or escape from ordinary life. The purpose is coherence: to test whether symbol, breath, rhythm, number, attention, and conduct can become living instruments again. Drawing from Hermetic tradition, the Tree of Life, correspondence, field-based models of reality, and the living question of consciousness, this volume offers a practical method for walking the Ladder station by station. It is designed for readers who sense that the old tools were never merely decorative, and that a true symbol is a key, not a picture of a key. This is Hermetic fieldcraft for the disenchanted age.