This is the permanent navigation root for the RAPT ecosystem. It separates canonical constraints (Principia Attractum) from experimental downstream work (Bio-Kernel Series).
Exogenous systems persist because an external agent supplies correction, selection, or maintenance. Endogenous systems persist because the system itself contains the mechanisms that detect drift, pay maintenance costs, and restore admissibility. The Biosphere program stays within these constraints and moves persistence from exogenous cabling into endogenous closure.
The authoritative text of Recursive Admissibility and Persistence Theory (RAPT).
Experimental digital biospheres exploring admissible attractor formation under canonical constraints. The Bio-Kernel Series landing page routes into Bio-Kernel A and Bio-Kernel B.
Principia Attractum defines canonical constraints. The Biosphere Series applies those constraints experimentally. No experimental result modifies, reinterprets, or extends the canon. Conflicts are resolved in favor of the canonical text and governance pages.