Why Stackline Studio

Stackline Studio exists because of a habit I couldn't shake: whenever I hit a real friction point in my own work, I'd end up building a small tool to fix it, use that tool for months, and only occasionally think to make it something anyone else could pick up. Most of those tools stayed personal. A few didn't, and that's where this studio actually starts.

The first one was Developer Second Brain. I was deep in DSA practice at the time, and juggling my own project tracking alongside it, and I kept feeling the lack of one place to hold all of it that I'd actually keep using. I built an Obsidian vault for exactly that — structured enough that I'd stick with it instead of abandoning it after a week like most note systems before it. It worked well enough, for long enough, that turning it into a real product felt less like a leap and more like an obvious next step. That's the whole story behind the first thing Stackline Studio ever shipped: it was mine first.

llm-personas came out of the same instinct, aimed at a different itch. I use Simon Willison's llm CLI regularly, and managing prompt personas by hand — the different setups I'd want depending on what I was doing — got old fast. So I built a plugin to manage them properly, and shipped it free, because it's the kind of small utility that only matters if it's frictionless to get.

The most recent product, llm-mcp-server, followed a more deliberate process than the first two. I didn't just notice my own itch this time — a small research pipeline surfaced a real, evidenced gap in what the llm CLI ecosystem supported around MCP tooling before I decided it was worth building. It shipped free, same as llm-personas, because the goal isn't to charge for everything I make. It's to build things worth using, and to charge only where that actually makes sense.

That's the pattern across all of it, and it's the whole idea behind Stackline Studio: this is an independent, one-person studio, not a team chasing a roadmap. Most of what I build leans on Python and AI somewhere in the process, whether that's in how something gets built or what it actually does for you. I ship one focused product at a time rather than spreading across a dozen half-finished ideas, and every product here started as something I needed myself before I ever thought about whether anyone else would.

I don't know exactly what ships next. What I can tell you is that it'll follow the same rule everything else here has: it starts from a real problem, not a guess at what might sell.