An Architectural Origin of Organismal Unity (v1.1) - Basin Re-entry and Developmental Reconstruction

This version (v1.1) refines and extends An Architectural Origin of Organismal Unity by addressing how organismal unity is reliably reconstructed across generations. Building on the Unity Criterion introduced in v1.0—which defines organismal unity as a dynamical inevitability arising when mutual regulation outpaces individual collapse—this update clarifies embryogenesis as a process of basin re-entry rather than blueprint execution. Early development is interpreted as the traversal of a sequence of non-optional organisational regimes required to re-establish a shared recovery basin before differentiation can occur. This framing provides an architectural explanation for the observed fragility of early development, the convergence of early embryonic forms across related species, the lethality of early perturbations, and the conservation of early developmental architecture. Developmental failure is interpreted as loss of access to stability-preserving transitions rather than as missing components or faulty genetic instructions. No new mechanisms are proposed. Instead, v1.1 completes the conceptual arc of the framework by linking multicellular unity to development, regeneration, and heredity through viability constraints rather than teleological design. The revision is fully compatible with v1.0 and strengthens its connection to empirical findings in developmental biology and bioelectric regulation. Life as a Phase Transition — Series Overview Foundational framework A. An Architectural Origin of Organismal UnityFoundational Paperhttps://doi.org/10.5281/zenodo.18305134 B. Life as a Phase TransitionFoundational Paperhttps://doi.org/10.5281/zenodo.18176157→ Defines life as a maintained, non-equilibrium basin governed by regulation and boundary constraints. Heredity constraint and theory closure C. The Analogue Heredity Ceiling and the Basin Digitisation TransitionHeredity constraint frameworkhttps://doi.org/10.5281/zenodo.18250555→ Formalises the limit of compositional (analogue) heredity and explains why replayable archives (digitisation) become unavoidable within the life-as-a-phase-transition framework. Companion papers — Mechanisms and consequences 2. The Basin of Identity: microRNA as a Kinetic Anchor in Multicellular Dynamics https://doi.org/10.5281/zenodo.18181118 → Explores how kinetic anchoring mechanisms stabilise basin identity in multicellular systems, now interpretable as local management of identity dimensionality and heritability stress. 3.Boundary Shedding as Basin MaintenanceA Control-Theoretic Extension of Life as a Phase Transitionhttps://doi.org/10.5281/zenodo.18215113→ Describes boundary shedding as a regulatory strategy for maintaining basin coherence under stress. 4.Cohesive Membranes and the Emergence of Multicellular Basin IdentityWhen Many Compartments Become One Organismhttps://doi.org/10.5281/zenodo.18215283→ Examines how multicellular organisation emerges from coupled boundary systems and shared basin identity. 5. From Control to ReplayArchives, Development, and Sexual Reproduction in Boundary-Defined Lifehttps://doi.org/10.5281/zenodo.18215367→ Investigates replay, development, and sexual reproduction as stabilising mechanisms, now unified by the Basin Digitisation Transition. 6. Boundary Architecture and Failure in Living SystemsA regulation-first classification of biological formhttps://doi.org/10.5281/zenodo.18226987→ Classifies biological form and failure modes through boundary architecture and regulatory breakdown. 7.The Boundary Renewal Principle:An Architectural Account of Heredity and Evolutionhttps://doi.org/10.5281/zenodo.18335521