Sarina Li

research eng @sievedata | cs @ uoft 🇨🇦 | prev @trycua @shopify, @confluentinc, @mozilla

[Sarina Li @sarinajnli]

@part_harry_ Can I try

[Sarina Li @sarinajnli]

@cory Hallo ! I’m at https://t.co/pm1t5ciuEJ

[Sarina Li @sarinajnli]

@maxdrawup Figuring it out!

[Sarina Li @sarinajnli]

i made local text to speech on macos that is 30x faster than real time and takes less than 130ms to start talking 😛

(RTF 0.033x p50 on long passages, synthesis time / audio duration, TTFA time to first audio chunk is under 130ms!)

hardware: m4 pro 48GB
software: coreml + koroko 82M + chrome ext

named hachispeak bc hachiware is a talkable character on chiikawa and friends :-)

repo: https://t.co/SYKe2FlNRc

next: use built in apple api from Vision Pro OCR to extend this beyond browser

[Sarina Li @sarinajnli]

@AlexsonChu What hardware constraint? Is it taking advantage of the iPhone model inference under the hood?

[Cua @trycua]

1/ Today we're bringing Cua Driver to Linux: background computer-use for any agent. Hermes, Claude Code, Codex, or your own loop can drive real Linux desktop apps (X and Wayland in preview) through CLI or MCP while your desktop stays usable

[Cua @trycua]

We're open-sourcing Cua Driver - our new macOS driver that lets any agent (Claude Code, Codex, your own loop) drive any app in the background, with true multi-player and multi-cursor built-in.

1/8

[Sarina Li @sarinajnli]

shipped a real-time sky shader as a react component. install with

try: npx sky-shaders add SkyShader

copies the source into your project so you own it. three
cloud layers using fbm noise with domain warping, beer-lambert absorption, subsurface scattering, full day-night cycle with sun, moon and stars. all gpu, single fragment shader!

see demo: https://t.co/tvDjsQQ88B

[Sarina Li @sarinajnli]

@si_pbc Can I try this out? I’d love to add integration on https://t.co/l4EuVJRSMP

[Sarina Li @sarinajnli]

@ycombinator @usecardboard @sxmawl love to see it!!

[Sarina Li @sarinajnli]

fck the clean my mac apps claude code does a better diagnosis than they could ever 😭

[Sarina Li @sarinajnli]

@kvinhe Flying there on 12th

[Francesco @francedot]

https://t.co/WNLMPn1jwm

[Sarina Li @sarinajnli]

This is why I encourage anyone to try a startup, only @francedot could push me to try something trending on X/Twt after he saw it 2 h ago and make it production ready + actually ship it!

Result? We did 130k+ impressions on our blog post and video and we open sourced it and we continue to work on computer use :)

@trycua gratitude!!

[Francesco @francedot]

A bunch of you asked about our Remotion setup after the article.

It's now open-source: https://t.co/0TvCzgFCeo

• Video templates for product launches
• Shared animation components
• Works with Claude Code + Remotion skills
• How we made the Cua-Bench video in 2 hours

[Francesco @francedot]

A bunch of you asked about our Remotion setup after the article.

It's now open-source: https://t.co/0TvCzgFCeo

• Video templates for product launches
• Shared animation components
• Works with Claude Code + Remotion skills
• How we made the Cua-Bench video in 2 hours

[Sarina Li @sarinajnli]

@trycua 👀👀👀

[Sarina Li @sarinajnli]

@francedot +1 to version control and hosting on GitHub. Now I don’t pass files back and forth for approval, just pull changes

[Cua @trycua]

We've been using Cua-Bench internally—and with customers—for the last few months to evaluate every computer-use agent we deploy.

Today it's open-source. 15 public tasks, 40 variations, adapters for OSWorld and Windows Agent Arena. One CLI, self-hostable.

[Cua @trycua]

https://t.co/DmdpIjkUJl