Summary Beyond Extraction: An Architectural Blueprint for Sovereign Digital Infrastructure in Sub-Saharan Africa is a technical commentary and policy brief prepared by the Hitherto Center for the Advancement of Technological Trust (H-CATT, SCIO) in response to the International Monetary Fund (IMF) 2026 Departmental Paper, Unlocking the Potential: AI in Sub-Saharan Africa. While the IMF paper outlines a stark contrast between a 0.2% "current-conditions" productivity baseline and a 2.1% "high-adoption" scenario reliant on foreign venture capital, public-private partnerships (PPPs), and corporate "anchor tenants," this paper rejects the premise that Sub-Saharan Africa must choose between economic stagnation and surrendering sovereign infrastructure to multinational technology cartels. Moving away from soft governance ("finger-wagging") and administrative policy promises, H-CATT provides an operational blueprint grounded in **Architectural Enforcement**: embedding sovereignty, privacy, and clinical/domain integrity directly into the code and hardware defaults of Digital Public Infrastructure (DPI). Key Themes & Architectural Remediations Grassroots Intelligence over Western Desktop Models: Critique of standard task-based macroeconomic models (e.g., Acemoglu framework) that treat informal and rural sectors as zero-impact zones. Proposes Partitioned / Moded Intelligence (*Arête Techne*) delivered over low-bandwidth voice, USSD, and SMS channels to serve as a "state capacity filler" in health, education, and agronomy.Resisting Energy Extractivism: Rebuttal to the IMF’s "corporate anchor tenant" model that diverts sovereign renewable energy (geothermal, hydro, solar) to power foreign cloud servers while local communities remain unconnected. Proposes **decentralized, solar-powered Nexus Mesh networks** operating asynchronously offline.Debt-Free Infrastructure via Sovereign Data Trusts: An alternative to multilateral debt, foreign aid, and vendor-financed PPPs. Demonstrates how nations can monetize their scarce, renewable language and cultural speech corpora through sovereign **Educational Data Trusts**, creating a closed-loop, self-replenishing financial engine.The Six Gateways of Defensive Procurement: Introduces six non-negotiable architectural gates for public-sector technology procurement, including Stateless-by-Design protocols (the Bauta Valve) for zero PII persistence, an absolute prohibition of biometrics on minors, complete white-labeling/agnosticism, open/auditable code, local processing, and mandatory pre-deployment training.Sovereign Governance & Subsidiarity: Advocates for Technical Literacy Minimums (TLM) for regulators, Neutral Party Liaisons, Multi-Objective Decision Analysis (MODA), and federated horizontal reciprocity across neighboring Global South regions. Institutional Statement & Open Access Commitment This paper is published by H-CATT (SCIO), the uncompromised non-profit arm of Hitherto AI. Reference implementations and technical architectures mentioned throughout this document are cited strictly as proof-of-concept that "building better is possible," not as commercial suggestions. All frameworks, specifications, and reference models contained within this publication are placed in the public domain. H-CATT offers non-remunerated technical consultation to sovereign governments, public institutions, and multilateral bodies seeking to build digital infrastructure rooted in self-determination, trust, and zero extraction. Keywords: AI Governance, Digital Public Infrastructure, Digital Sovereignty, Global South, Sub-Saharan Africa, IMF Critique, Architectural Enforcement, Data Trusts, Stateless-by-Design, Nexus Mesh, Anti-Extractivism, H-CATT.