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README.md

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-# AISA — Agentic AI Systems Architecture
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 <h1 align="center">AISA — Agentic AI Systems Architecture</h1>
 
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 <p align="center">
 A unified reference architecture for designing, deploying, and governing agentic AI systems.
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+</p>
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+# AISA — Agentic AI Systems Architecture
+
+AISA (Agentic AI Systems Architecture) is a layered conceptual framework for
+the design, deployment, and governance of agentic AI systems.
+
+Recent advances in large language models have enabled autonomous systems
+capable of reasoning, planning, tool use, and multi-step interaction with
+complex environments. However, existing agentic systems are often developed
+in fragmented and ad hoc ways, lacking a unified architectural structure.
+
+AISA provides a holistic reference architecture that integrates cognitive
+agent design, tool execution, orchestration infrastructure, continuous
+evaluation, deployment operations, and governance considerations into a
+single coherent model. The framework is intended to serve as a shared
+vocabulary and design blueprint for researchers, practitioners, and
+policymakers working on next-generation autonomous AI systems.