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📰 Dev.to · yongrean

16 articles · Updated every 3 hours · View all reads

All Articles 129,064 Blog Posts 133,903 Tech Tutorials 33,365 Research Papers 25,152 News 18,269 ⚡ AI Lessons

Dev.to · yongrean 📐 ML Fundamentals ⚡ AI Lesson 3w ago

Confidence is enough to decide. It's not enough to do.

A classifier confidence of 0.99 is enough to decide a tier. It is not enough to send an email you...

Dev.to · yongrean 🧠 Large Language Models ⚡ AI Lesson 3w ago

I let GPT-4o and a cheaper model fight over my inbox. GPT-4o lost.

Here's the scoreboard. Same 50 emails, same prompt, same 4-tier...

Dev.to · yongrean 🤖 AI Agents & Automation ⚡ AI Lesson 1mo ago

Treat upstream catalogs as mutable: how a free-tier model SKU retirement broke my AI agent

Tuesday afternoon, every autonomous cycle in my agent started returning the same error: [AGENT]...

Dev.to · yongrean 1mo ago

MCP CI gates need retry receipts for flaky downstreams

MCP CI gates need to distinguish two very different failures: the server is actually broken the...

Dev.to · yongrean ☁️ DevOps & Cloud ⚡ AI Lesson 1mo ago

tools/list is not a readiness check for MCP servers

The first version of mcp-probe checked the obvious things: can the MCP server initialize? does...

Dev.to · yongrean 🛡️ AI Safety & Ethics ⚡ AI Lesson 1mo ago

Stop Building AI Assistants. Build AI Firewalls.

Every week another "AI agent for X" launches. Email triage. Calendar coordination. Sales follow-up....

Dev.to · yongrean 1mo ago

MCP CI gates need receipts: tools/list is not enough

MCP servers are starting to look like normal infrastructure. That means they need boring...

Dev.to · yongrean ☁️ DevOps & Cloud ⚡ AI Lesson 1mo ago

mcp-probe v1.6.0: Stricter GitHub Actions checks for MCP CI gates

I shipped mcp-probe v1.6.0 with a small but useful improvement to mcp-probe doctor. Previous...

Dev.to · yongrean 1mo ago

mcp-probe v1.5.0: Doctor checks for MCP CI readiness

MCP servers are starting to look like infrastructure. That means the tooling around them needs boring...

Dev.to · yongrean 🤖 AI Agents & Automation ⚡ AI Lesson 1mo ago

Stop building AI inboxes. Build decision layers instead.

I spent six months building an AI-powered email tool. Then I deleted half of it. Not because the...

Dev.to · yongrean 1mo ago

mcp-probe v1.4.0: Contract assertions for production MCP servers

MCP servers are starting to look like infrastructure. That means the old readiness question is no...

Dev.to · yongrean ☁️ DevOps & Cloud ⚡ AI Lesson 2mo ago

mcp-probe v1.0.0: A CI readiness gate for MCP servers

mcp-probe started as a small CLI for checking whether an MCP server starts and exposes tools. That...

Dev.to · yongrean 📋 Product Management ⚡ AI Lesson 2mo ago

I disabled push notifications on my own AI app in 24 hours — here is what I rebuilt

I disabled push notifications on my own AI productivity app within 24 hours of shipping it. That was...

Dev.to · yongrean 2mo ago

I built an AI that filters what actually needs your attention — architecture, failures, and what works

I used to start every morning the same way: open Gmail, feel immediately overwhelmed, spend 40...

Dev.to · yongrean 🧠 Large Language Models ⚡ AI Lesson 2mo ago

ko-prompt-kit: Production-ready Korean LLM prompts for Claude & GPT

If you're building AI apps that need to output natural Korean, translating English prompts doesn't...

Dev.to · yongrean ☁️ DevOps & Cloud ⚡ AI Lesson 2mo ago

I built the npm audit for MCP servers

The MCP (Model Context Protocol) ecosystem has exploded. awesome-mcp-servers lists 200+ servers — but...