The mobile verification for AI agents. Use with CLI, MCP, or Node.js API. By @callstackio
Poland
Joined June 2026
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πππππ-ππππππ retweeted
so I got nerd sniped by @o_kwasniewski with an experimental renderer being faster than agent-device in e2e, so now v0.21.29 comes with:
β 2Γ faster Android taps and verified fills
β 18Γ faster immediate screenshots,
β 18% quicker on a 42-test suite
enjoy
πππππ-ππππππ retweeted
ok expo simulators are pretty cool. agent-device testing itself like it always does, now in the cloud
πππππ-ππππππ retweeted
This is very cool and generally what we are seeing across our best apps. 99 of incident.io's last 144 mobile PRs were written by agents. Now the agents also run each change on an @expo cloud simulator with @agent_device and hand the reviewer screenshots and a video.
πππππ-ππππππ retweeted
Great article from @incident_io on testing apps in the cloud with agents.
Nice insights and explanations on tunneling simulator access from a lightweight VM.
Powered by @agent_device and @expo infrastructure!
we like this growth trajectory.
latest drivers: T3 Code and e2e.
happy to power great products with efficient agent verification tooling
πππππ-ππππππ retweeted
e2e by @TesterArmy runs mobile tests through our open-source @agent_device. Combine goal-based agent actions with exact assertions, then replay cached actions without inference on cache hits.
Read how it works on iOS and Android π clstk.com/4i1onKP
πππππ-ππππππ retweeted
react-native-arrangement-view now runs on @TesterArmyβs e2e + @agent_device, folding the device and testing different postures
πππππ-ππππππ retweeted
Great explainer on e2e, a testing framework by @TesterArmy powered by @agent_device on mobile
Introduction to Verification Engineering
In this video, you'll learn:
β How to build an agentic loop with @testerarmy's e2e open source testing framework
β Run this loop on every PR
β What makes e2e different: deterministic AND agentic
β The future of agentic development
Both e2e and @t3codes build on agent-device.
What will you build?
agent-device is in the weights of @apex__ai.
use it for QA testing and exploration too
Announcing Apex: agentic coding model for mobile and web, specialized in React.
We built Apex from a single idea: can an open-weight model deliver frontier-level performance at lower cost?
Yes. Apex is SOTA in React Native and Next.js.
Try it now: apex.callstack.com
Mobile powered by agent-device. Future of e2e testing is bright
Introducing e2e
The agentic testing framework for any app
~/ npx e2e init
β Fully Open Source
β Mix deterministic and agentic APIs
β Supports web, mobile, and more
β Bring your own agent and infrastructure
β Run locally or in CI
tester.army/e2e
πππππ-ππππππ retweeted
Introducing e2e
The agentic testing framework for any app
~/ npx e2e init
β Fully Open Source
β Mix deterministic and agentic APIs
β Supports web, mobile, and more
β Bring your own agent and infrastructure
β Run locally or in CI
tester.army/e2e
πππππ-ππππππ retweeted
Great to see @agent_device powering the app interaction in @expo bug-fixing workflow.
Reproduce the crash, fix it, verify it on EAS Simulator. Bring back recordings for a human to review.
Check it out! β¬οΈ
expo.dev/blog/agent-fixes-buβ¦
πππππ-ππππππ retweeted
I became a T3 Code user recently - itβs great especially if you have many subs and many machines to manage. I recommend giving it a shot if you havenβt already π. I also like in-app simulator preview experience support powered by @expo device hub (for streaming) and @agent_device (for agentic control) π
T3 Code now has a device hub to let you and your agent see and manage iOS and Android simulators while working!
One of the coolest things (I think) is that the simulator doesn't even have to run on your device! You can setup remote hosts to let agents running on Linux boxes trivially test iOS changes on a Mac Mini!
Still early but wanted it out there, lmk any feedback! Available now on nightly!
πππππ-ππππππ retweeted
Any agent can test iPhone Duo apps for you now. No need to do it by hand.
Folded, half-open, open, all without stealing your focus or other agents sessions.
Just give them @agent_device
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You can hire Jev from @typesafeai as your QA tester
πππππ-ππππππ retweeted
The @AgentConf keynote covers Apex, @agent_device
Apex now generally available! And free during the conference.
Cheap and fast intelligence!
apex.callstack.com
