Danny Prevoznik

Founding DevRel Eng @usekernel • building crazy fast browser infra | formerly @cashapp @afterpayUSA | OP (manga) progress reflected in banner image

[Danny Prevoznik @DanielPrevoznik]

cursor agent is the quiet luxury of coding harnesses

[Danny Prevoznik @DanielPrevoznik]

getting there

[cinesthetic. @TheCinesthetic]

Happy "Dazed & Confused" day!

[Rafael Garcia @rfgarcia]

🚀 https://t.co/MQFQIAO4oM

[Danny Prevoznik @DanielPrevoznik]

@usekernel @stably_ai "And with Kernel handling all browser infrastructure, Stably's engineers focus entirely on their core AI testing platform instead of managing browsers"

[Danny Prevoznik @DanielPrevoznik]

"You quickly lose trust if you can’t distinguish between a legitimate test failure and flakiness from the infrastructure." 🎯

[KERNEL @usekernel]

.@stably_ai uses kernel to build an ai-powered end-to-end testing platform.

by switching to kernel, they saw 333x faster cold starts and eliminated infra-caused test flakiness.

"we evaluated many options, and kernel is the only one that could deliver the performance all of our customers' test suites required." - jinjing liang, co-founder & ceo, stably

[Mason Williams @masonwilliams]

our team has certainly learned a LOT about how to scale chromium sandboxes in the cloud over the past year

the most important thing here is that iteration will happen

and yes of course, we are and always will be crazy fast

[Danny Prevoznik @DanielPrevoznik]

@rfgarcia @usekernel i personally love that the unikernel + hypeman work is open-source too. build and blog in public

[Rafael Garcia @rfgarcia]

the trick that makes @usekernel fast: we pay the full 5-10s of starting chromium once, snapshot ram to nvme, and resume in ~30ms when a request lands.

from the outside it looks like a giant warm pool. under the hood it's mostly cold disk. wrote up how we got here.

[Danny Prevoznik @DanielPrevoznik]

@usekernel everything that makes kernel the right choice for your browser infra boiled down into one article 👏

[Danny Prevoznik @DanielPrevoznik]

learn more about how kernel's infra got where it is today

[KERNEL @usekernel]

https://t.co/Air1LllR7N

[KERNEL @usekernel]

https://t.co/Air1LllR7N

[Danny Prevoznik @DanielPrevoznik]

@ycombinator @TesterArmy great launch!

[Danny Prevoznik @DanielPrevoznik]

+ agent recommends how to improve the process in the future based on the call

[Danny Prevoznik @DanielPrevoznik]

> handle process alone for 9 months at startup
> don't write up how to do it
> new person joins team who needs to learn it
> panic...💡
> 20 minute call to walk through it while ai records
> internal agent drafts up entire wiki in one-shot
> sorted✌️

[Danny Prevoznik @DanielPrevoznik]

could have def explained this better lol. you can do this on @usekernel super easily

[Danny Prevoznik @DanielPrevoznik]

1-click deploy an anthropic cua agent w/ only an anthropic api key

[Danny Prevoznik @DanielPrevoznik]

https://t.co/X2gF4XOJWf

[Danny Prevoznik @DanielPrevoznik]

https://t.co/vzsYsoCeTL

[Danny Prevoznik @DanielPrevoznik]

must read
https://t.co/p6ZoDVyUKR

[Danny Prevoznik @DanielPrevoznik]

our internal agent having access to @attio mcp is a big deal to me