Follow the Story of Devmystify

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

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

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

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

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

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

Mailstify #5 - Email Logic and Previews (Action Mailer)
TutorialNovember 19, 2025
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Mailstify #5 - Email Logic and Previews (Action Mailer)

With the campaign content styled, it’s time to wire up the delivery pipeline using Action Mailer. We’ll connect rich text to personalized email templates and configure live browser previews to verify your designs before sending.

Mailstify #4 - Campaign Design and Rich Content (Action Text)
TutorialNovember 12, 2025
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Mailstify #4 - Campaign Design and Rich Content (Action Text)

After mastering audience management, it’s time to give Mailstify its creative core, building and styling campaigns with Action Text, the Rails-native editor for rich, dynamic emails.

Mailstify #3 - Go Dynamic! Building Real-Time Audience Lists (The Hotwire Way)
TutorialNovember 5, 2025
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Mailstify #3 - Go Dynamic! Building Real-Time Audience Lists (The Hotwire Way)

Let’s continue Mailstify, where we bring our Mailchimp clone to life with real-time audience management using Hotwire, no JavaScript, no dependencies, just pure Rails magic.

Mailstify #2 - User Identity and Multi-Tenancy (Built-in Auth)
TutorialOctober 30, 2025
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Mailstify #2 - User Identity and Multi-Tenancy (Built-in Auth)

Let’s continue Mailstify, where we secure our Mailchimp clone with built-in Rails 8 authentication and multi-tenancy, no external gems, just pure Ruby on Rails.

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