Modernizing Legacy Systems with AI

Agents, Pipelines, and Knowing the Difference

Most businesses leverage AI models built by OpenAI, Anthropic, Google, and a growing open-source ecosystem.

That means the differentiator isn't the models you use, but how well you understand which AI architecture solves a given problem ... and if you can build it to production standards.

Our free white paper presents a framework for thinking about AI-driven modernization across three distinct architectural patterns, drawn from real production systems built by Taazaa. Each system required a different architectural approach.

Chapter
1

The AI Architecture Spectrum

We classify AI systems into three categories, with five examples to illustrate the differences.

Chapter
2

Document Processing for Tax Administration

An event-driven AI platform that replaced an entire manual pipeline.

Chapter
3

Intelligent Coaching for Retail Traders

An AI Coach as a daily analytics pipeline with a strict separation of concerns.

Chapter
4

Agentic Healthcare AI

A truly agentic system that reasons and acts.

Chapter
5

Orchestrated Pipelines

Orchestrated pipelines with conditional intelligence.

Chapter
6

Cross-cutting Architectural Patterns

Repeated patterns across all five systems.

Chapter
7

The Correct Architecture Determines Success

Successful AI modernization matches the right architecture to the problem.

Not Every AI Workflow Is "Agentic"

Conversations around AI tend to label a wide range of capabilities as “agentic AI.”

However, there is a meaningful distinction between an AI system that classifies documents and routes them through a deterministic pipeline, and one that autonomously reasons about which tools to invoke based on a user’s natural-language query.

Conflating the two can lead to over-engineering, unnecessary costs, and fragile systems that may not produce results.

Each architecture discussed in this white paper excels in a specific domain. The engineering skill is in selecting the right one.

We dissect five production systems that illustrate the full spectrum.

Modernizing Legacy Systems with AI

April 1, 2026
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Article Contents

Most businesses leverage AI models built by OpenAI, Anthropic, Google, and a growing open-source ecosystem.

That means the differentiator isn't the models you use, but how well you understand which AI architecture solves a given problem ... and if you can build it to production standards.

Our free white paper presents a framework for thinking about AI-driven modernization across three distinct architectural patterns, drawn from real production systems built by Taazaa. Each system required a different architectural approach.

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