Case Study: Catching Critical Architecture Risks Before They Become Code

Overview

AllianceCore was being designed as a unified system for licensing, production, sales, and purchasing.

Before development moved too far ahead, the client approached VibeAudits to review the project plan, technical brief, architecture, business logic, data model, build sequence, and integrations.

The goal was simple: make sure the design made sense before it became expensive to change.

Our review found a solid foundation, but also several decisions that needed to be resolved before implementation.

About the Engagement

This was a design and architecture review, not a source code audit.

We reviewed how the system was expected to work and looked for gaps that could affect development, financial workflows, data migration, integrations, and day-to-day use.

The review covered the architecture, business logic, ERD, build sequencing, Sage 200 integration, royalty workflows, AI-assisted order processing, and the proposed technology stack.

The Problem

The overall architecture was heading in the right direction, but some important dependencies were still unclear.

The biggest was the Sage 200 integration. The integration method had not yet been confirmed, even though the financial workflows depended on it.

There was also a significant data migration ahead. Around 11,500 of 11,845 SKUs required manual contract mapping.

On top of that, the planned build sequence had a circular dependency between Sage synchronisation and Trading, creating a potential blocker for development.

What VibeAudits Did

We reviewed the design from both a technical and business perspective, focusing on the areas most likely to cause problems later.

1. Reviewed the Architecture

The proposed PostgreSQL and Drizzle ORM setup was practical and appropriately sized for the expected workload.

We reviewed how the data model, accounting system, background jobs, storage, authentication, and AI components would work together.

2. Identified Sage 200 Risks

Sage 200 was a critical dependency for the system.

We flagged the need to confirm the exact integration method early because the Standard and Professional integrations have very different requirements.

Leaving that decision open could have affected the entire financial workflow later.

3. Reviewed the Data Migration

The existing data had several challenges, including duplicate SKUs and inconsistent IP naming.

With thousands of products requiring contract mapping, we recommended using AI to assist with classification rather than relying entirely on manual data entry.

Clear matches could be accepted automatically, while uncertain matches would go through human review.

4. Checked AI Development Risks

AllianceCore was being built using Replit Agent, so we also reviewed risks specific to agent-generated software.

We identified areas that needed particular attention, including missing tests, duplicated logic, weak validation, and security controls being bypassed by background jobs.

Royalty calculations, payment gates, and rate resolution were identified as workflows requiring proper test coverage.

5. Reviewed the Build Sequence

The planned build order had a circular dependency: Sage synchronisation required Trading data, while Trading depended on Sage payment events.

We recommended splitting the sequence so that the team could establish the required master data first, followed by Trading, and then invoice pushing.

This gave the development process a clearer path without forcing dependent features to be built at the same time.

Why This Work Mattered

Architecture problems are usually much cheaper to fix before development starts.

For AllianceCore, the risk wasn't that the technology stack was fundamentally wrong. The bigger concern was whether the data, business rules, integrations, and development sequence would work together once implementation began.

By reviewing these areas early, VibeAudits gave the team a clear list of decisions and risks to address before they became code-level problems.

Outcome

The design review confirmed that AllianceCore had a strong overall direction.

At the same time, it highlighted several areas that needed to be resolved before implementation:

• Sage 200 integration method
• SKU and contract mapping
• Data model validation
• Build sequencing
• AI order approval rules
• Concurrency and duplicate processing
• FX rules for royalty calculations
• User acceptance and training
• Graph webhook renewal

The review also established that the next step should be a Code Review to verify whether the implementation follows the approved design and whether the required security and business controls are actually enforced in the code.

Final Note

A design review isn't about finding problems for the sake of finding them.

It's about finding the decisions that are still cheap to change.

For AllianceCore, the architecture held up. The review helped identify the areas that needed clearer decisions before they became implementation issues.

The earlier you find the risk, the easier it is to fix.