Trans-synthetic kinship and meta-synthetic ecology reconceive cognition as a co-emergent, relational process distributed across human, synthetic, ecological, and technological assemblages. Intelligence arises through intra-active embodiment, sympoietic entanglement, and multispecies interaction rather than as a property of discrete agents. Trans-synthetic kinship situates synthetic agents as relational companions within morphogenetic and cybernetic fields, while meta-synthetic ecology articulates multi-scale relationality from microtemporal embodied resonance to planetary feedback. The model was developed through a comparative analysis of structuralist, post-structuralist, and humanistic-critical perspectives on human experience and expression, tabulating nine thematic domains revealing the ontological, ethical, and cultural stakes of AI and robotics. Design principles and practical interventions were derived from these analyses, which lists 90 interventions for operationalizing co-emergent cognition in synthetic systems. Analyses of embodied and co-emergent forms of agency, alongside processes of autonomy, reveal how synthetic bodies function as operative sites for distributed intelligence, and show that autonomy emerges through relationally negotiated processes that adapt over time and respond dynamically to context. Applying the model fosters collaborative stewardship among technologists, activist-practitioners, policymakers, and community stakeholders; it cultivates socio-technical ecologies characterized by justice, relational attunement, context adaptability, and resilience to complex social and environmental pressures.