@cassidoo

Making memes, dreams, & software! Sr. Director of Dev Experience at @github. Married to @ijoosong, mom of 2 nerdy babies. She/Her ✝️ Subscribe to my newsletter!

 Chicago, IL
cassidoo.co/newsletter
Joined October 2011
  • Tweets39.3K
  • Following735
  • Followers185K
2.3KMedia
Ohhhhh
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Cassidy retweeted
Tianzhou
@tianzhouchen22h
A look under the hood at how GitHub rebuilt its star history API. As the maintainer of @StarHistoryHQ, I can confirm the new API is much faster and more reliable. Thanks to the GitHub team for listening to our feedback!
Camilla Moraes
@moraes_c_Oct 20
We worked with maintainers, including @tianzhouchen, to build a better way to track GitHub stars over time. The new API returns daily star counts without exposing who starred a project, making star history easier to retrieve, cheaper to serve, and more private. Here's how we built it: github.blog/engineering/arch…

From 2,500 requests to 24: Rebuilding star history without the stargazers

Our new repo star history API now provides trends without returning individual identities or requiring unbounded database work.

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The GitHub Universe badges are sick 😍
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The vlog version of my latest issue is out! youtu.be/I30HdZ13mg8

cassidoo's newsletter roundup (October 20)

It's time to rendezvous with cassidoo! Here's what was in the Octob...

youtube.com
Cassidy
@cassidooOct 19
The latest issue of my newsletter is here! I get meta and talk about the new archive website I built for it, as well as the usual joke, practice coding, cool links, and moooore. Read it online and subscribe here: cassidoo.co/newsletter/2026-…

rendezvous with cassidoo - Issue #479

Weekly web-dev links, an interview question, cool finds, and a joke. Issue #479 of cassidoo's newsletter.

cassidoo.co
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We worked with maintainers, including @tianzhouchen, to build a better way to track GitHub stars over time. The new API returns daily star counts without exposing who starred a project, making star history easier to retrieve, cheaper to serve, and more private. Here's how we built it: github.blog/engineering/arch…

From 2,500 requests to 24: Rebuilding star history without the stargazers

Our new repo star history API now provides trends without returning individual identities or requiring unbounded database work.

github.blog
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all the posts about people hacking their TVs have made me so happy, I can't wait to mess with mine later
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Ben Gilbert
@gilbertOct 20
Still one of the best moments in a business interview ever.
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AI made coding faster for 87% of devs. Only 28% feel less friction. @Atlassian's 2026 State of DevEx Report nails why: info hunting, meetings, context switching, and correcting AI that missed intent still eat the week. Tool usage as a productivity signal just creates performative AI. Faster functions do not fix team bottlenecks, but a SDLC strategy does! Panel on the findings: fandf.co/4sayz8j Full report: fandf.co/4yW7Qz4 #DevEx #StateOfDevEx #ad #atlassianpartner + Thank you to Atlassian for sponsoring!
🤝 Paid partnership

The State of Developer Experience in 2026

What did 1,500+ software practitioners say about AI? Join a panel of industry experts unpacking key findings from Atlassian’s 2026 State of DevEx Report.

atlassian.com
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We just raised a $60M Series B at a $1B valuation to build @daytonaio into the Agent Cloud. @FirstMarkCap led the round, with all key existing investors and angels doubling down. We're also thrilled to welcome the founders of some generational companies aboard, including @patrickc (Stripe), @tobi (Shopify), @AravSrinivas (Perplexity), @BrendanFoody (Mercor), @oliveur (Datadog), @adamdangelo (Quora) and @ericsyuan (Zoom) We're a 35-person team. But that's about to change; we're hiring across the board, and we'd love for you to join us.
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Cassidy retweeted
GitHub
@githubOct 19
Agents don’t just help build features. They can help try to break them, too. In our latest GitHub Podcast episode, Sameen Karim takes us behind the scenes on building stacked PRs. Listen to it wherever you get your podcasts or at youtu.be/sbHoDdAalMI?si=purN…
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The latest issue of my newsletter is here! I get meta and talk about the new archive website I built for it, as well as the usual joke, practice coding, cool links, and moooore. Read it online and subscribe here: cassidoo.co/newsletter/2026-…

rendezvous with cassidoo - Issue #479

Weekly web-dev links, an interview question, cool finds, and a joke. Issue #479 of cassidoo's newsletter.

cassidoo.co
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This issue is sponsored by @sonarsource! Valid code can still leak another user's invoices. SonarQube Hunter Agent hunts those intent flaws (access control, biz logic, auth/sessions), validates them, & drops them into SonarQube w/ a plain explanation. fandf.co/4dC6uRl
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✒️ Discord-RSS v2.0: One service, one webhook, with a better web UI for Discord RSS conr.dev/posts/2026/10/disco… #rss #sveltekit #nodejs

Discord-RSS v2.0

One service, one webhook, with a better web UI for Discord RSS

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Cassidy retweeted
Andrea
@acolombiadevOct 16
stacked prs @github behind the scenes. the merge box is way more complex than you think, we touched code that hadn't been updated in a decade, and we set a swarm of agents loose trying to break it 🤯 full episode: youtu.be/sbHoDdAalMI
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github pages is criminally underrated as a hosting platform
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I wrote about how I rewrote my newsletter archive! It was an ordeal! cassidoo.co/post/static-news…

Building a static newsletter archive

I decided to host my newsletter archive myself on this website!

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Also, the latest video edition of my latest issue is now out: youtube.com/watch?v=qpIQcKgX…

cassidoo's newsletter roundup (October 15)

It's time to rendezvous with cassidoo! Here's what was in the Octob...

youtube.com
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Cassidy retweeted
mike
@mikeswartz_Oct 14
Replying to @hassanrahim
they're trying to cut open the bird to find the song
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See this post for more info! linkedin.com/posts/we-want-t…

We want to help keep the vibrant developer community connected in light of the Grace Hopper...

We want to help keep the vibrant developer community connected in light of the Grace Hopper Celebration's cancellation. If you had plans to be in California this month, GitHub would love to welcome...

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If you had a ticket to Grace Hopper and have not cancelled your plans to go to San Francisco, go to @github's LinkedIn right now if you'd like to attend GitHub Universe for free ❤️
AfroTech@AfroTechOct 14
Grace Hopper Celebration Canceled: A Big Loss For Women In Tech This Year buff.ly/ZwOSpB6

Grace Hopper Celebration Canceled: A Big Loss For Women In Tech This Year - AfroTech

Now that the Grace Hopper Celebration has been canceled for 2026, many people are wondering what happens next for women in tech.

afrotech.com
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Cassidy retweeted
Andrea
@acolombiadevOct 15
If you had a ticket to Grace Hopper and have not cancelled your plans to go to the bay, go to LinkedIn and DM GitHub right now if you’d like to attend Universe for free.
AfroTech@AfroTechOct 14
Grace Hopper Celebration Canceled: A Big Loss For Women In Tech This Year buff.ly/ZwOSpB6

Grace Hopper Celebration Canceled: A Big Loss For Women In Tech This Year - AfroTech

Now that the Grace Hopper Celebration has been canceled for 2026, many people are wondering what happens next for women in tech.

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