Eugeniu Ghelbur
Practical AI engineering for engineers and technical operators who ship production systems.
At a Glance
AI Tools by Eugeniu Ghelbur
(1)
obsidian-second-brain
Claude CLI Obsidian Vault Tool
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Latest News
I built 30+ AI shortcuts for my own work. Three save me three hours every day.
I built the primitive. Glean is the wrong wedge.
I rebuilt Karpathy's LLM Wiki. Here's what's missing from the original.
Hit #80 Rising in Technology on Substack.
Products & Services
Practical AI operator notes, playbooks, and build breakdowns.
Deep-dive builds, templates, starter kits, and direct Q&A.
Open-source Claude Code skill that operates an Obsidian vault as a living personal knowledge OS.
Market Position
Practical, experience-based engineering notes vs high-level market commentary.
Leadership
Founders
Eugeniu Ghelbur
AI Automation Engineer at Single Grain. Expert in building agent systems for marketing and revenue operations. Maintainer of the 'obsidian-second-brain' open-source project (1,000+ GitHub stars).
Executive Team
Eugeniu Ghelbur
Founder & AI Automation Engineer
Currently working at Single Grain building AI agent systems. Solo publisher of The AI Operator.
Founding Story
Started as a way to share systems built for personal use and professional work as an AI Automation Engineer. Built on top of a personal Obsidian vault system.
Business Model
Revenue Model
Subscription-based (Substack)
Pricing Tiers
Roughly one post per week, short playbooks, lessons from production.
Every post, deep-dives, templates, starter kits, email Q&A.
Everything in Paid, 30 mins 1:1 time per quarter, early access, behind-the-scenes notes.
Target Markets
- Engineers
- AI Builders
- Technical Operators
- Marketing automation
- Revenue operations
- Personal knowledge management
- AI agent development
- 1,374+ GitHub clones/users of obsidian-second-brain