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Dev.to·Friday, December 19, 2025

Dev.to - Friday, December 19, 2025

10 stories~15 min

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Hear all 10 stories summarized and read aloud.

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Stories Covered

01

Cutting LLM Expenses and Response Times by 70% Through Bifrost's Semantic Caching

When deploying Large Language Models in production environments, development teams encounter what can be described as an "Iron Triangle" of competing priorities: expense, speed, and output quality. While maintaining quality standards is typically essential, the other two factors grow proportionally with user adoption, creating mounting challenges. Each interaction with API providers such as OpenAI, Anthropic, or Google Vertex carries both monetary and temporal costs that can span multiple second

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02

The HotfixHero code Manifesto: Seven Rules to Live By

I hear you. You want the technical specifications on how to stop being an embarrassment to your team. Fine. Writing code that scales and doesn’t induce chronic migraines is all about discipline, not magic. Forget your complex patterns for a second—master the basics first. Here are the seven commandments I live by. Read them, implement them, and maybe, just maybe, your code review won't look like a war crime report. DRY (Don’t Repeat Yourself) Every piece of logic, every business rule, and every

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04

TABLE Jen Royle: A Communal Dining Experience Rooted in Presence and Connection

In Boston’s historic North End, where culinary tradition and neighborhood culture intersect, one dining experience has redefined what it means to gather for a meal. TABLE Jen Royle was created with the intention of restoring connection to dining, placing people and conversation at the center of the experience rather than speed or exclusivity. From the moment guests enter the space, the atmosphere feels intentional and inviting. Long communal tables replace individual seating, encouraging guests

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05

Hacktoberfest as a First-Time Maintainer

Earlier this year, I took over maintenance duties on Cloudinary's Community Libraries. Fast forward a few months, and my team was gearing up to participate in Digital Ocean's annual Hacktoberfest. Reader, I was worried. I was still very much familiarizing myself with how the libraries worked, and trying to wrap my head around their issue backlogs. And while I'd never participated in a Hacktoberfest in any capacity before, I had read some scary things from other maintainers, who complained of an

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06

Our attempt to reduce the boring 40–60% of AI engineering

The question I kept coming back to: Is there a tool that automates the low-skill, high-repetition parts of our AI workflow? Because after you ship a few real RAG/agent systems, you notice the time sink isn’t the model. It’s the scaffolding you rebuild every time. The repetitive glue work that quietly dominates AI engineering Most teams end up re-implementing the same reliability layer: 1. Deterministic ingestion 2. Chunking + metadata + ID hygiene 3. Schema validation (so JSON doesn’t b

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07

Testing Mobile-First Platforms in Bangladesh: A UX Case Study of Joya 9 (2025)

Testing Mobile-First Platforms in Bangladesh: A UX Case Study of Joya 9 (2025) As part of my research into digital accessibility and mobile user experience in Tier 3 markets, I recently conducted a hands-on test of several popular online platforms used in Bangladesh. One that stood out — not for branding or scale, but for its hyper-localized mobile design — is Joya 9. While the platform operates in a legally gray area (online gambling is not regulated in Bangladesh), its technical execution of

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08

Engineering a Multi-Capability MCP Server in Python

The era of chatbot isolation is ending. For a long time, Large Language Models (LLMs) lived in a walled garden—brilliant reasoning engines trapped behind a chat interface, unable to touch your local files, access your database, or execute code on your machine. The Model Context Protocol (MCP) changes that paradigm entirely. It provides a standardized way to connect AI assistants to the systems where actual work happens. However, many developers stop at the "Hello World" of MCP: exposing a simple

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09

Key Breakthroughs in AI Engineering that Every AI Engineer Must Know

This blog post provides a clear understanding of the logic behind the entire technological evolution, showing how we went step by step from "this thing can run" to "this thing can actually do work." We'll explain the development of AI engineering from 2017 to the present in a simple and easy-to-understand way. The key breakthroughs are grouped into 4 categories as follows: The starting point of this story is 2017. The famous paper called "Attention Is All You Need" is the "birth certificate" of

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10

Cybersecurity Weekly#12: What Developers Should Care About This Week

Phishing emails are no longer easy to spot. Attackers are now using AI tools to: Mimic internal company language Write near-perfect grammar Personalize messages using leaked data For developers, this means email-based trust is officially broken. If your workflow still relies on “click the link to confirm” logic, it’s time to rethink it. Dev takeaway: Open-source dependencies remain one of the weakest links in modern development. This week, researchers flagged multiple malicious packages that: Lo

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