Grzegorz Mandziak

🏗️ at @callstackio
Working with ⚛︎ on Web and Mobile

[Grzegorz Mandziak @alimek_]

@mattpocockuk I recently started using more often /diagnosing-bugs instead of /grill-me or /grill-with-docs like before for tasks which are not new features, but just bug fix. Its game changer 🔥

[Grzegorz Mandziak @alimek_]

@peter_kow yes, all works happening on Mac Studio as headless runner, with Hermes Agent etc, but if i need to do anything in Claude/Codex i still run it on remote from my macbook via T3 Code :-)

[Laurids 🇪🇺🇺🇦🇵🇸 @lauridskern]

Introducing Mobile Dev: full mobile dev tooling right in your Codex app ✨

[Grzegorz Mandziak @alimek_]

@supabase i must be last one, for sure.

[Grzegorz Mandziak @alimek_]

@o_kwasniewski working like a charm! vibe coded runner based on agent device moved to trash on side project!

[Grzegorz Mandziak @alimek_]

@grabbou shit, that triggered me 🔥

[Callstack Engineers @callstackio]

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: https://t.co/nKbBxcmRFX

[Grzegorz Mandziak @alimek_]

every day new model, its going quite fast 🙉

[Google DeepMind @GoogleDeepMind]

Introducing Gemini 4 Argon – our new frontier model.

It’s built for complex workflows across coding, enterprise knowledge work, and cybersecurity defense – rolling out today to a set of trusted testers through our Fairwind Program.

[Grzegorz Mandziak @alimek_]

@grabbou can't wait to test dots and maybe replace some of Hermes agents with new . . . s 👀

[Grzegorz Mandziak @alimek_]

@ferrannp maybe I did something wrong if that works for your OC instance. My Hermes for agents + few dockers + iOS/Android simulators + all remote harnesses were not performing well on that base mini. I think it mainly struggled with local LLM for Honcho memory for agents 🤖

[Grzegorz Mandziak @alimek_]

@kentcdodds if I wouldn't play Tibia, I probably wouldn't be developer now, because of hosting the Open Tibia Servers :o

[Hur Ali @hurali97]

Meet TraceSift ⚡️

An open-source tool that turns CPU and React profiles into actionable performance insights without flooding your agent’s context.

Early benchmark (GPT-5.6 Terra):
• Codex: 45K tokens
• TraceSift: 1.6K tokens

That’s ~28× fewer tokens 👀

[Callstack Engineers @callstackio]

We’re excited to share this one: the Agent Conf talks are live on YouTube.

A huge thank you to every speaker who helped us shape this conference.

Watch Agent Conf on YouTube 👉https://t.co/KnRgHHOJmO

Which talk are you starting with?

[Grzegorz Mandziak @alimek_]

I was thinking I will have chill weekend after @AgentConf but today I got access to Jev, so its time to play with it 🤖🚀

[Grzegorz Mandziak @alimek_]

@thiagobrez @reactuniverse_ @AgentConf It is extended for whole weekend 18-20.09 🤖🤖🚀

@AgentConf