The Next Shape of the IT Business Capability Model: From Vendor Substrate to Owned Agentic Platforms

Authors note: This paper's title page lists JD Longmire as sole author. Per ADR-EA-0008, the AI-centric Digital Ecosystem (AIDE) corpus is jointly authored by JD Longmire and Micah Longmire; this deposit's metadata reflects that corpus-level identity. The on-paper artifact attribution is preserved as published. The IT business capability model has functioned for two decades as a procurement map. It enumerated the capabilities an enterprise required, and for each it named the commercial product that would supply it. The arrival of agentic artificial intelligence breaks the assumption beneath that map. Software is no longer a static tool that an enterprise rents and configures. It is becoming a learning system that encodes institutional knowledge as it operates, and that knowledge belongs to whoever owns the system. OAAD (Open-source software Agentic-AI Devsecops) is the platform thesis that responds: enterprises move from vendor substrate to owned agentic platforms, with OSS as the build substrate, agentic AI as the operational logic, and DevSecOps governance binding the two. The paper specifies the architectural posture, the phased adoption path, and the institutional implications. This paper is part of the AI-centric Digital Ecosystem (AIDE) corpus; see https://github.com/ologos-repos/aide-canon for the canonical home and related work.