Follow the Story of Devmystify

Discover our latest insights, updates, and stories

TutorialMarch 4, 2026Author: Tibo
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How to Migrate a Rails App from Heroku to DigitalOcean App Platform

Heroku is in maintenance mode. Here's how to move your Rails app to DigitalOcean App Platform without losing sleep over it.

TutorialFebruary 4, 2026Author: Tibo
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When AI Gets Too Helpful: Understanding RAG

LLMs hallucinate because they’re trained to answer even when they’re unsure. RAG (Retrieval-Augmented Generation) reduces this by letting the model “look up” relevant documents first, grounding responses in real sources instead of guesses.

TutorialJanuary 28, 2026Author: Tibo
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Equip Your AI with Skills

This article explores how Claude Agent Skills turn best practices into reusable AI capabilities, from scaffolding a well-architected API to running a senior-level code review in minutes.

TutorialJanuary 21, 2026Author: Tibo
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Picking the right AI for your SaaS

Choosing the right AI for your SaaS isn’t about picking the most powerful model, it’s about picking the right one for the job. This guide breaks down real-world AI pricing, performance, and trade-offs to help you ship smarter while saving money.

TutorialJanuary 14, 2026Author: Tibo
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Hello World, MCP - Building a Safe SQL Assistant for Claude Desktop

Build a secure MCP connector that gives Claude Desktop safe, read-only access to a local PostgreSQL database, eliminating context dumping while protecting your data.

TutorialDecember 24, 2025Author: Tibo
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Local AI vs. ChatGPT: Face-off

Cloud LLMs like ChatGPT offer speed and accuracy, while local models trade intelligence for privacy and zero cost. This hands-on comparison shows where each one wins.

TutorialDecember 17, 2025Author: Tibo
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Local LLMs for Development: Privacy & Power with Ollama + Crush

Cloud LLMs are convenient, but they come at a cost: your data. In this tutorial, we build a fully private, offline AI coding setup using Ollama and Crush, running modern language models locally while keeping your code, prompts, and ideas entirely on your own machine.

TutorialDecember 10, 2025Author: Tibo
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Taskify: Building a Spec-Driven React App with SpecKit and Codex

In this tutorial, we explore a new way to build with AI. Using SpecKit and Codex, we create Taskify, a React TypeScript app defined entirely by its specification.

TutorialDecember 4, 2025Author: Tibo
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Mailstify #7: Finalizing, Cleanup, and Conclusion

We’ve reached the finish line of Mailstify. In Part 7, we add campaign status tracking, sent-email counters, and wrap up our end-to-end architecture, proving how far pure Rails can go without external gems.

TutorialNovember 26, 2025Author: Tibo
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Mailstify #6: Asynchronous Bulk Dispatch (Solid Queue)

With our campaigns ready and polished, it’s time to send them at scale. In Part 6, we harness Solid Queue to power fully asynchronous, background email dispatch, turning Mailstify into a true bulk sender built entirely on native Rails.

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