Codebase Architecture: Designing for Scale, Modularity, and Sanity

"A practical, developer-first handbook for structuring React + FastAPI projects—from AI MVPs to scalable platforms."

Live Site: https://mcklay.github.io/codebase-architecture/
Author: Clay Mark Sarte
Built with MkDocs Material | Covers React + Vite + FastAPI | AI-first ready

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What This Is

This is a book-style, structured guide for software engineers who care deeply about folder structure, modularity, scalability, and architectural sanity—especially in the age of AI-driven, full-stack applications.

Whether you're:

• building your first AI-powered prototype,
• collaborating across teams,
• or refactoring a tangled monolith into scalable layers—

This guide walks you through real-world patterns, decisions, trade-offs, and templates used in React + FastAPI ecosystems.

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Table of Contents (Brief)

• Part 1 – Foundations
  Why folder structure matters. How modularity and scalability impact collaboration and maintainability.

• Part 2 – Modularity
  Feature-first folder structures for React + FastAPI. Ideal for solo devs, MVPs, and isolated features.

• Part 3 – Scalability
  Layered architecture. Cross-team readiness. How to scale shared logic, services, and infrastructure.

• Part 4 – Hybrid & Advanced
  Combining modular and scalable structures. Monorepos, shared logic, refactor-safe migration paths.

• Part 5 – Case Studies & Templates
  Real-world AI apps. Smart Receipt Analyzer, GPT-powered Chatbot, and Mockup-to-Code tool. Includes clone-ready templates.

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Built With

• Markdown-first structure
• MkDocs Material (for future site deployment)
• Real code examples using React + Vite and FastAPI
• AI-first use cases (OCR, GPT, vector DBs)
• Docker, CI/CD, and deployment structure guides

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Getting Started

# Clone the repo
git clone https://github.com/McKlay/codebase-architecture.git
cd codebase-architecture

# Optional: Setup MkDocs site locally
pip install mkdocs mkdocs-material pymdown-extensions
mkdocs serve

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Templates and Samples

You'll find downloadable folder templates under /templates/:

• modular-react-fastapi-template/
• scalable-react-fastapi-template/
• hybrid-ai-app-template/

Each template includes:

• Clean folder breakdown
• Feature/sample implementation
• README + bootstrap instructions

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Preview Chapters

Chapters are organized in Markdown under /docs/ and can be browsed directly or rendered as a site via MkDocs.

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Status

In Progress New chapters are being added weekly. Feedback, ideas, and contributions are always welcome!

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License

MIT License © Clay Mark Sarte
Open for learning, remixing, and evolving—credit where credit is due.

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