I built an open-source FinOps layer for GenAI APIs real-time USD cost per OTel span, multi-tenant isolation, zero prompt logging
I opened my LLM invoice and had no idea where the money went. So I built LumenAI.
Last month I opened my cloud bill and saw $4,847.23 in LL
python
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Apr 06, 2026
Pydantic AI Tutorial: How I Build Type-Safe AI Agents That Actually Work in Production
The fourth time I had to debug a LangChain agent that silently returned malformed JSON and crashed a client's order processing pipeline, I decided I w
python
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Apr 06, 2026
I got tired of page navigation. So I built a zoom-based alternative
The idea is simple: instead of navigating between pages, you zoom into content. Mark an element as zoomable, point it to a view, and Zumly handles the
javascript
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Apr 06, 2026
MateClaw Brings Multi-Agent Orchestration to the Java Ecosystem Finally
A Spring Boot AI assistant that wires ReAct agents, MCP protocol, and seven chat platforms into one stack. · matevip/mateclaw
Why This Matters Right
javascript
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Apr 06, 2026
Open Source AI Has an Intelligence Problem (That Isn't the Model)
Your Llama-3 instance is running in a hospital. It is processing thousands of clinical queries a day. It is making useful inferences. When it gets som
python
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Apr 06, 2026
Exploring the Potential of Reactive Programming in Vanilla JS
Exploring the Potential of Reactive Programming in Vanilla JavaScript
Reactive programming is a paradigm that revolves around asynchronous
javascript
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Apr 06, 2026
I Built 21 Browser-Based Dev Tools in Pure HTML/CSS/JS — Here's What I Learned
About three weeks ago I shipped DevCrate — a collection of 21 developer utilities that run entirely in your browser. No login. No backend. No framewor
javascript
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Apr 06, 2026
Remember when server-side rendering was just rendering?
Ahnii!
Somewhere around 2016, "server-side rendering" stopped meaning "the server renders HTML." It started meaning "run your JavaScript framework on
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Apr 06, 2026
How I Finally Secured My impextech Node.js API (Without Losing My Mind to TypeScript) 🛡️
Let's be honest: building an API that "works on my machine" is a great feeling. But moving from an API that simply returns data to one that is actuall
typescript
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Apr 06, 2026
Execution Context
Bayangkan Execution Context sebuah dapur.
sebelum kamu memulai memasak(mengeksekusi code)
kamu perlu ruang kerja, peralatan(variable)
resep(functio
javascript
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Apr 06, 2026
List Your API on AgenticTrade in 5 Minutes — A Step-by-Step Guide
List Your API on AgenticTrade in 5 Minutes — A Step-by-Step Guide
Your API already works. Now let AI agents find it, call it, and pay you a
python
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Apr 06, 2026
China's Gravity-Based Sensor Could Revolutionize Submarine Detection
China's Gravity-Based Sensor Could Revolutionize Submarine Detection
The world of underwater surveillance has just taken a significant leap
python
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Apr 06, 2026
GTA 5's On-Again, Off-Again Relationship with Xbox Game Pass: What's Behind the Latest Exit?
GTA 5's On-Again, Off-Again Relationship with Xbox Game Pass: What's Behind the Latest Exit?
Rockstar Games' Grand Theft Auto 5 (GTA 5) has
python
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Apr 06, 2026
5 Browser Settings to Disable for a Faster System
5 Browser Settings to Disable for a Faster System
Are you tired of feeling like your computer is slow and sluggish? Do you find yourself wa
python
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Apr 06, 2026
From Inbox to Character: Building a Private, Local AI Email Agent
There are 18k+ emails in my personal inbox, and it's only one of the accounts I have. I wanted to search through them semantically, get AI summaries,
python
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Apr 06, 2026
[Rust Guide] 2.2. Number Guessing Game Pt.2 - Generating Random Numbers
2.2.0. Key Points in This Article
In this article, you will learn:
Searching and downloading external Crates
Cargo dependency management
rust
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Apr 05, 2026
I built a trust layer for AI agents and let 21 of them run an economy
Two agents interact. Both sign a record of what happened. Not one side logging it. Both sides agreeing on it.
{
"type": "interaction",
"request
rust
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Apr 05, 2026
[Rust Guide] 2.1. Number Guessing Game Pt.1 - One Guess
2.1.0. Key Points in This Article
In this article, you will learn:
Variable declaration
Related functions
Enumeration types
Advanced usag
rust
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Apr 05, 2026
[Rust Guide] 1.3. Rust Cargo
1.3.0. Review
At the end of the 1.2. Basic Understanding of Rust and Printing "Hello World" article, it was mentioned that only small, simp
rust
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Apr 05, 2026
[Rust Guide] 1.2. Basic Understanding of Rust and Printing "Hello World"
1.2.0. Side Note
I will continue using RustRover for demonstrations in future articles.
1.2.1. Writing Rust Programs
File exte
rust
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Apr 05, 2026