Quern

Well howdy! First time poster, long time caller. I am a QA professional who has worked with mobile devices a long time. When Claude Code hit, I was excited until I realized that it could barely do anything with mobile devices apart from writing app code and installing the app.

@birch_js @thymikee @bidah It’s true! Quern doesn’t have a UI at all - it is focused on agent usability. But it has all the ui control /logs /screenshots many others have, PLUS a full featured network proxy that is basically a headless, programmable, per-simulator proxyman.

@thymikee @bidah Everyone’s building them! (Dj is a legit dev, mind, his SimDeck should be really good too)

preview react native apps directly in your IDE. Baguette is the first and most powerful setup to run this. CIO

@Kelset Quern is a must! Claude can now test on mobile, plus it has a full featured network proxy, great for testing network error handling. quern.dev

📢 native mobile devs! (#ios and #android) I'm curious: what tools do you use with your coding agents/LLMs? Any special skills or tools that make the agent better at interacting with your app? I'd like to get a sense what's up in your 🌍 ♻️ appreciated 👀

Quern version 0.13 just dropped this morning. We replaced our idb dependency (for iOS simulator control) with a home-rolled interface inspired by the folks over at baguette. quern.dev

@itshanrw Hey there! Just wanted to let you know that I integrated a couple things you were using in baguette. Also, discovered a solution to a problem you have, check out issue 17 I just filed on your GitHub repository. 😎 Thank you so much!

@optimalfocus @anamhira Quern uses local simulators and/ or real iPhones. If you develop anything that needs a real phone— Bluetooth accessories, NFC interactions, etc. you need real devices. quern.dev

@anamhira Claude does this in real XCODE simulator as it goes and tests it on its own.

codex can now ship and test iOS features on live devices. no scripts. no selectors. no xcode. one prompt

@retrovesto @ssarisen That’s what I ended up doing. quern.dev

@ssarisen bununla test yazmayı deniyim. en son buna benzer maestro denedim. hiç iyi değildi. kendim bir şey yazmayı düşünüyordum artık en son.

ios simulator için cli aracı gerekiyorsa bu alet çok iyi iş çıkartıyor. cli üzerinden ios cihazınıza komutlar verebiliyorsunuz. browser test araçları gibi ancak ios simulatörü yönetiyor. accessibility api üzerinden tap, swipe, type, screenshot, video kaydı, hardware buton, hepsi var. üstüne claude codea skill olarak yüklenebiliyor ai agenta iphone simulator vermek gibi bir şey ücretsiz ve open source

@tom_doerr Nice!

Automates Xcode builds and iOS simulator workflows for Claude Code github.com/conorluddy/ios…

@itshanrw Excellent!

We've Just Open-sourced Baguette — a single Swift CLI for headless iOS 26 simulators. • Boot / shutdown without Simulator app • 60 fps MJPEG or H.264/AVCC streaming • Host-HID taps, swipes, multi-finger pinch, scroll • Web UI on localhost with DeviceKit bezels Apache-2.0 Welcome PR and Stars github.com/tddworks/bague…

@mylifcc @b_nnett A few players in this space! With Quern, you can do the prototyping and extensive testing, including network error handling with its per-simulator proxy. quern.dev

Codex++ 直接开源 + 内置 iOS Simulator？这波操作直接把开发循环干碎了 🔥 以后原型 native UI 再也不用切来切去 Xcode 了，效率起飞！ 自定义键盘快捷键这个 tweak 也太实用，我已经想好要加哪些快捷键了～ 开源了就该冲！@b_nnett 牛逼，PR 安排上 仓库地址在这里：github.com/b-nnett/codex-…

@natiakourdadze You might like Quern. It lets your agent (Claude or whatever) take care of building and installing your app, manage your simulators, look at logs, use the UI in realtime to complete tasks, and even write scripts for repeatable stuff you don’t want to burn tokens on…

Can you guess when I started building iOS apps? 👀

@svpino But what about developers that have to use Xcode?

The Framework 13 Pro is truly in another league. I have a pre-production version (the one I bought gets here in July), and this thing is beautiful. I've been using this for an hour, so I'll post a more detailed review in a few days, but for the first time ever I feel this can go toe to toe with a MacBook in terms of quality. As a reference, I've been a Mac user since 2009. Fast. Top-notch trackpad and keyboard. 4:3 touchscreen display. Upgradeable. Infinite battery life. Here is a picture of me writing this tweet. I'll record a video next week.

@mchulet @X If you love AI-driven mobile app dev, you will love Quern. It takes the hassle out of the high-friction things that make you leave your terminal. A thousand cuts of simulator management, log copypasta, proxy setup hell, screenshots, and ui automation. quern.dev

Hey founders!! @X Looking to connect with people building in: 💻 SaaS ⚙️ Tech 🤖 Automation 🧠 AI tools 📦 Product Development 🌐 Web apps Drop what you're working on 👇🏻

@NextGenAi5 You forgot the ‘test’ step. Quern can help with that. It is built to help Claude understand how to work with simulators, devices, and your app, so you can build, run, and test your app by asking Claude to run test cases in plain English. quern.dev

The mobile app industry just change forever. AI can now: • Write app code • Design UI • Fix bugs • Build prototypes instantly And Claude is leading the shift. I made a complete “AI App Builder Blueprint” for beginners. Free for 24 hours only Comment “Need”& I’ll send it.

@MainActorDev @urugothor @hxxwhite Okay, awesome, I will put something together! Really appreciate the feedback.

@querndev @urugothor @hxxwhite A general demonstration of how Quern works will do. I would like to try it myself, but I'm in the middle of exploring other stuffs. Super hectic ✌️

10 phones. Every PR. 3 minutes. No flaky scripts. Just natural language. This is mobile CI now.

@MainActorDev @urugothor @hxxwhite Good question. Anything in particular you want to see demonstrated? Quern is AI-first and doesn’t have a UI. It’s your agent’s window, and your simulator (or video stream of a real device).

@querndev @urugothor @hxxwhite Where is the demo? First impression matter.

We live in a world where basically every idea can now be productized within hours Most of those new productized ideas may only end up having 1 user (you), but it’s still incredible 🤯

For 50 years, software engineering ran on code rationing. Writing code was expensive, so we rationed it carefully through roadmaps, RFCs, prioritization meetings, and scope reviews. This created a role: the No Engineer. No, that won't scale. No, we don't have bandwidth. No, that's out of scope. No, we need a design doc first. The No Engineer was valuable for 50 years. Every "no" saved real money. Their judgment was the rationing system. LLMs will be the end of code rationing. Code is cheap now. And while the No Engineer is explaining why something can't be done, the Yes Engineer has already shipped three versions of it. If you're a Yes Engineer, the next decade is yours.

@kingfxyo Seeing the simulator is cool! But check out Quern if you want to let Codex manage your simulators and devices, control them in real time, set up per-simulator network proxy for observation and testing, and write programmatic scripts for all of it. quern.dev

for anyone building apps, this is one of the coolest things I’ve seen this week i’ve been head down working on multiple revenue generating apps, and having a simulator built right into codex is a game changer thinking about building my next app publically 👀

@digitalix Alex, you work in mobile dev, yeah? I think you might like Quern, it turns a thousand paper cuts of simulator management, proxy configuration, log copypasta, and device ui control into a joy. Well, more joyful at least. I hope you like it. quern.dev

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@Nithya_Shrii I’ll see you a burned CD, and raise you a CD burner I just made a few months ago, for burning MP3 CDs. github.com/jerimiah797/mp…

If you knew how to “burn a CD” you old as hell.