Hassan

Founder & CEO @SemSwitch. Building Setsuna — true-cold Firecracker microVMs for agent compute. 88ms p50, no snapshots or warm pools.

[Hassan @TheHassanEffect]

Dallas → San Francisco next week for @OpenAI DevDay.

Looking forward to meeting other builders and founders working on agents, developer infrastructure, and next-gen AI systems. If you're attending, say hi or DM me.

See you there. @OpenAIDevs

[Jonathan Fischoff @jfischoff]

Terance Tao: Imagine prescribing a drug no one understood.
Medical community:

[Hassan @TheHassanEffect]

@matt_teeixeira what doesn't it do?

[Hassan @TheHassanEffect]

Either I used the shit out of the last reset or Astra eats usage like a whale.

[Hassan @TheHassanEffect]

I spoke too soon. Wtf.

[Hassan @TheHassanEffect]

Let's not get it twisted, Astra still whoops Sol.

[ClaudeDevs @ClaudeDevs]

You can now mod Claude Code:

- Change how it behaves
- Customize the UI
- Swap in your own features

Write one with a few lines of TypeScript, or have Claude build it for you. Mods ship inside plugins, so you install them with /plugin in the CLI or desktop app.

A few examples:

[Hassan @TheHassanEffect]

@thsottiaux Codex /goal make “resets” obsolete

[Hassan @TheHassanEffect]

@thsottiaux @OpenAIDevs Can I trade my 62.5k of credits for 5 months of Ultra instead?

[Elon Musk @elonmusk]

Best way to sandbox an AI is to put it on a Delta flight – it will have no chance of accessing the Internet!

[Hassan @TheHassanEffect]

@r_marked If I hold on this for 20+ years, kept in pristine condition, sealed in box, then decide to sell it as a collector’s item, you’re against that?

[Hassan @TheHassanEffect]

@schneidenbach Yup saw you speak, great job and great question

[Hassan @TheHassanEffect]

@kokkisajee Facts! 😆

[Hassan @TheHassanEffect]

I accidentally named my CosmosDB `Cormos` in Azure and didn't realize it until weeks later and tons of work was already shipped.

Azure doesn't let you change the name either.

Now I laugh everytime an AI agent mentions the 'cormos db'

[Saturday Night Live @nbcsnl]

Dario Amodei is at the desk to assure that the future of humanity is safe from AI

[Hassan @TheHassanEffect]

Thanks @AnthropicAI @claudeai

Opus 5.5 has been great to work with, and this will help to take it even further.

[Hassan @TheHassanEffect]

@thsottiaux stream disconnected before completion: websocket closed by server before response.completed 😣

[Hassan @TheHassanEffect]

Has this ever happened to anyone else in GPT Web?

This is the first time I ever saw this pop up and I only had two requests going at once. On 20x Pro.

@OpenAI @OpenAIDevs

[Hassan @TheHassanEffect]

I still think about that magical first hit of Fable when @AnthropicAI dropped it on June 9.

Absolute pure, uncut digital cocaine.

Then 3 days later the feds pinch the only supplier on Earth and the industry goes into immediate withdrawal.

You just had to be there. #IYKYK

[Hassan @TheHassanEffect]

@thsottiaux Flying into SFO from Dallas next week, see you all at Dev Day!

[Hassan @TheHassanEffect]

@AnthropicAI 's @claudeai Opus 5.5 is a great model and very cost-efficient while being, IMO, 80-90% as effective as Fable.

I've been using Opus 5.5 and allowing it to run 2 concurrent Fable subagents for implementation assistance and it's been wonderful. Highly recommend.