Oskar Groth
@oskargroth
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Building and exploring human-agent interaction. AI @sparkmintai / Apps @cindoriapps ($1.5M)
Stockholm, Sverige
Joined December 2013
I wrote about my journey experimenting with VR on macOS, and I’m open-sourcing all my VR projects:
oskargroth.com
A deep dive into rendering macOS in VR on Mac: stereo SceneKit on Metal via swizzling, zero-copy IOSurface capture, hidden-area stenciling, and VR Desktop's virtual display driver.
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I finally launched a personal blog. First post is up: Lessons from a Swift interview with Apple https://t.co/cm88E0Cy8P
oskargroth.com
Lessons from a technical interview on designing Standard Library-quality Swift algorithms, and the key insight I missed about Sequence vs Collection conformance.
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Building with Claude Opus 4.5 in Claude Code is literally a holy experience I feel like there’s no problem in the world I can’t solve myself
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Went hard on marketing Backdrop and Sensei this Black Friday, and the results were amazing. Seasonal sales are such an underrated exposure hack, I reached tons of users I’d never hit otherwise.
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If you sell your app on Setapp you support this company btw
MacPaw charging users $650 for CleanMyMac is absolutely disgusting Combined with fear-based copy like "Neutralize threats before they do any harm" and gimmick features like “freeing up RAM”, it amounts to blatantly predatory behaviour toward non-technical Mac users
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MacPaw charging users $650 for CleanMyMac is absolutely disgusting Combined with fear-based copy like "Neutralize threats before they do any harm" and gimmick features like “freeing up RAM”, it amounts to blatantly predatory behaviour toward non-technical Mac users
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You know you've made it when your app starts hitting the crack sites
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Anthropic co-founder, Jack Clark: We are like children in a dark room, but the creatures we see are powerful, unpredictable AI systems Some want us to believe AI is just a tool, nothing more than a pile of clothes on a chair "you're guaranteed to lose if you believe the
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I've been blown away by Opus 4.5. You can just prototype different animation effects in SwiftUI and it doesn't trip. For the perfect day effect, I tried (and discarded): orbital sparks, shimmer highlights, breathing effect. What we landed on – double confetti pulse with ongoing
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Our Black Friday sale is live! This is your opportunity to grab Sensei or Backdrop at 50% off – our best deal of the year 👇 https://t.co/HBiFkgkYYx
cindori.com
Our Black Friday 2025 sale is live! Get Sensei or Backdrop at 50% off in the best deal of the year for all of our Mac apps.
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Hard to call this an AI bubble when twice as many Swedes own a truck stock as NVIDIA At the peak of the dotcom bubble, Telia (telecom company) had 4x as many shareholders as Volvo (800k+) We’re nowhere near that level of retail frenzy or real AI impact yet
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Honestly not using Claude Code is totally your loss. I was having a hard time connecting my self-hosting Ghost blog with tinybird analytics. Spent two days jumping between frontier models and endlessly copying and pasting logs, but no luck. Then I told Claude Code to ssh in the
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What are your biggest pain points when using Claude Code or other CLI agents?
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I’m becoming increasingly convinced that everyone that are having bad experiences with Claude (or AI in general) is using Cursor The agent tooling matters just as much as the model. Start using Claude Code
yeah, immediately not as good as gpt-5.1 i don't care what anthropic says opus 4.5 exhibits the same behavior that it did before, and the same as sonnet still has too. these models are bruteforcing solutions without deep thinking. for example, the JSON response from vercel's
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What humans can do with computers is about to explode. The potential of one person with a great idea using Claude Code is now astronomical
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