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What is an agent harness? Inside a real one
Agent = model + harness. Everyone benchmarks the first half. Here is the anatomy of the second half, drawn from an open-source system over 3,700…
Aug 6
•
Eugeniu Ghelbur
3
2
July 2026
How to Do Graph Engineering in a Markdown Vault
Your linked vault is already 80% of a graph index. The missing 20% is typed edges, supersedes chains, a lint, and a recall budget. Here is how to build…
Jul 31
•
Eugeniu Ghelbur
8
4
Every Test Passed. So I Started Reverting the Fixes.
I audited my own 3,600-star project and found 138 problems. The interesting ones were not the bugs. They were my own fixes that only looked fixed.
Jul 28
•
Eugeniu Ghelbur
Claude Code as a Second Brain: What the Tutorials Skip
Every guide shows you the first 20 minutes. Here is what breaks at month six, from the person who maintains the biggest one.
Jul 24
•
Eugeniu Ghelbur
10
4
3
What Is Graph Engineering? A Field Guide for Builders
The term went viral on X in 48 hours, with three competing meanings and one fabricated study. Under the noise: a real discipline with benchmark numbers…
Jul 21
•
Eugeniu Ghelbur
29
2
3
How I gave Claude Code memory without a vector DB
A small hook injects at most 4 notes from my Obsidian vault into every prompt. No embeddings, no database, and it knows when to stay silent.
Jul 18
•
Eugeniu Ghelbur
3
8
I built an AI tutor that fits on one screen
doceo is an open-source AI tutor built as a Claude Code skill. It turns any topic, file, or URL into a one-screen visual lesson, calibrated to what you…
Jul 7
•
Eugeniu Ghelbur
3
2
1
The CLAUDE.md behind a tool 3,000 developers use
This one file is the difference between an AI you can trust to run real work and one you babysit line by line. Here is my actual file, what I deleted…
Jul 4
•
Eugeniu Ghelbur
3
4
June 2026
I Run My Second Brain on Four AI CLIs
Claude Code, Codex, Gemini, OpenCode. One codebase, the same 45 commands. Your AI knowledge setup should not be hostage to one company's tool.
Jun 23
•
Eugeniu Ghelbur
3
2
2
AI Agent Loops Decoded: What's Real, What's Hype
I ran a 112-agent research swarm to fact-check the viral "300 agents" thread. Here's the pattern that's real, the numbers that aren't, and how to build…
Jun 19
•
Eugeniu Ghelbur
2
2
How to Build a Folder-Native AI Agent
AI memory and AI work are both just folders of markdown. Here's how to wire them into one agent.
Jun 16
•
Eugeniu Ghelbur
4
4
2
Karpathy's LLM Wiki v2: What to Keep, What to Skip
I rebuilt it, ran it daily for months, and most of the v2 hype is overkill.
Jun 9
•
Eugeniu Ghelbur
8
7
2
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