Sameen Karim

Product @github. Prev: @fliskdata, @rockerbox, @eventable. Proud @UCBerkeley dropout.

[GitHub @github]

Cooking up something new 🧑‍🍳

Join the waitlist for early access to technical preview of the GitHub Copilot app 👇
https://t.co/ODODKdvzOA

[Sameen Karim @sameenkarim]

@matanyall Sending you a DM 👍

[Sameen Karim @sameenkarim]

@JaidCodes @mitchellh Squashed the commit history before release. Look at the merged PRs

[Sameen Karim @sameenkarim]

@MichaelLatman Thanks for the callout! TIL prefers-color-scheme queries don't work in Safari with styles defined inside an svg. Should be fixed now

[Sameen Karim @sameenkarim]

We've put a fresh coat of paint on the Stacked PRs docs and clarified some of the content based on feedback ✨

https://t.co/LC0YDByFtn

[Sameen Karim @sameenkarim]

We're working on our docs and user experience while Stacked PRs is in private preview 🛠️

Excited to bring this to folks more widely soon!

[Sameen Karim @sameenkarim]

Let us know what you think! Please keep the feedback coming 🙏

https://t.co/PPwHs8rpH9

[Sameen Karim @sameenkarim]

We're working on our docs and user experience while Stacked PRs is in private preview 🛠️

Excited to bring this to folks more widely soon!

[Mitchell Hashimoto @mitchellh]

One of the most requested GitHub features in years and the website looks like it was designed by someone 9 years into a 2 year community college program. https://t.co/Mm1IeyRdy9

[Sameen Karim @sameenkarim]

@WonderingDavid @jaredpalmer @github That��s the plan! We’re developing gh stack as an extension to the gh CLI

[Sameen Karim @sameenkarim]

@chribjel @jaredpalmer @github Private preview right now with the waitlist. Public preview will be open to everyone in the coming months 🙏

[Sameen Karim @sameenkarim]

@ColtonIdle @github https://t.co/LC0YDByFtn

[Sameen Karim @sameenkarim]

Excited to share our progress on @GitHub Stacked PRs ����

[Sameen Karim @sameenkarim]

@iserflott @matthewisabel Squash merges are my favorite! Each PR in the stack is squashed to 1 commit. We git rebase --onto for each subsequent branch to replay commits from the head branch on top of the squashed commit

[Sameen Karim @sameenkarim]

@gitbutler @github We’re working on it 🫡

[Sameen Karim @sameenkarim]

Our goal is to make stacks work seamlessly across all of GitHub

That means getting it right so branch protection rules, Actions/CI, code scanning, reviews, rebasing, merging, etc. "just work" as you'd expect

More to come soon 🙏

[Sameen Karim @sameenkarim]

One of my personal favorite parts has been using the stacks CLI with agents ⚡️

The included skill file shows agents how to use stacks to break up a large diff or build a feature incrementally

Smaller PRs = higher quality code reviews

[David Poll @depoll]

Merge status in the PR header is beginning rollout, let us know what you think! Lots of improvements to the experience like this coming -- I'm excited!

[Matthew Isabel @matthewisabel]

A little caching goes a long way at GitHub scale

Since the start of the year, code view page loads under 100ms are up around 10x and climbing

This is both a result of caching and a number of other frontend improvements that rolled out to 100% today

[Sameen Karim @sameenkarim]

@github You can see it in action at https://t.co/IRgOlnYzIf

Or get the addon on GitHub
https://t.co/oflWi3c2aN

[Sameen Karim @sameenkarim]

The @github UI team has been on 🔥 lately, and they just open sourced one of their key tools: a storybook addon to help you break down performance on a component-level

[Sameen Karim @sameenkarim]

@github Web vitals + deeper level metrics like FPS, heap, DOM nodes count

https://t.co/aJB886DPll

[Matthew Isabel @matthewisabel]

Internally we use this for detecting janky or slow interactions with components

It supports analysis of six areas

- Frame timing
- Input responsiveness
- Main thread health
- React performance
- Layout stability
- Memory and resources