Cassidy
@cassidoo.co
Making memes, dreams, & software!
Sr. Director of Dev Advocacy at GitHub. Married to a dweeb and mom to a nerdy toddler + baby combo. She/Her ✝️ CHI 🏠
Subscribe to my newsletter!
cassidoo.co/newsletter
Sr. Director of Dev Advocacy at GitHub. Married to a dweeb and mom to a nerdy toddler + baby combo. She/Her ✝️ CHI 🏠
Subscribe to my newsletter!
cassidoo.co/newsletter
Pinned
Cassidy
@cassidoo.co
· Nov 4
Cassidy Williams
I'm Cassidy Williams, a software engineer, mom, and overall nerd in Chicago. I write about tech, projects, and whatever else I'm thinking about!
cassidoo.co
Hey new friends!
I'm Cassidy, based in Chicago.
I work at @github.com, and I love building projects, advising startups, helping people learn, and making memes.
Most of my work is open source, and I have a weekly newsletter and blog at cassidoo.co. Check it out, and see you around!
I'm Cassidy, based in Chicago.
I work at @github.com, and I love building projects, advising startups, helping people learn, and making memes.
Most of my work is open source, and I have a weekly newsletter and blog at cassidoo.co. Check it out, and see you around!
My phone finally updated to Liquid Glass!
who allowed this to happen
who allowed this to happen
January 13, 2026 at 4:16 PM
My phone finally updated to Liquid Glass!
who allowed this to happen
who allowed this to happen
Reposted by Cassidy
Hippie dippie a newsletter is coming your way!
I've got some fresh, hand-crafted:
- Web links
- A joke
- A practice coding question
- Some bits and bobs and mooore!
Check out the archive and subscribe here:
cassidoo.co/newsletter/
I've got some fresh, hand-crafted:
- Web links
- A joke
- A practice coding question
- Some bits and bobs and mooore!
Check out the archive and subscribe here:
cassidoo.co/newsletter/
rendezvous with cassidoo
A weekly newsletter with web development content for everyone, from beginners to pros.
cassidoo.co
January 12, 2026 at 8:17 AM
Hippie dippie a newsletter is coming your way!
I've got some fresh, hand-crafted:
- Web links
- A joke
- A practice coding question
- Some bits and bobs and mooore!
Check out the archive and subscribe here:
cassidoo.co/newsletter/
I've got some fresh, hand-crafted:
- Web links
- A joke
- A practice coding question
- Some bits and bobs and mooore!
Check out the archive and subscribe here:
cassidoo.co/newsletter/
I don't 😭😭 email them though, if there's more than just me they might listen??
January 13, 2026 at 3:27 AM
I don't 😭😭 email them though, if there's more than just me they might listen??
I noticed the issues listed here, too. Make sure you add a robots.txt file to your sites if you haven't already!
www.alanwsmith.com/en/37/wa/jz/...
www.alanwsmith.com/en/37/wa/jz/...
Fix Your robots.txt or Your Site Disappears from Google
a post from alan w. smith
www.alanwsmith.com
January 12, 2026 at 11:54 PM
I noticed the issues listed here, too. Make sure you add a robots.txt file to your sites if you haven't already!
www.alanwsmith.com/en/37/wa/jz/...
www.alanwsmith.com/en/37/wa/jz/...
This issue is sponsored by @ente.io!
Ente is an open-source platform to store photos, videos and more. Ente is end-to-end encrypted. Ente is cross-platform. Ente is beautiful.
I use it personally and recommend it!
ente.io?utm_source=c...
Ente is an open-source platform to store photos, videos and more. Ente is end-to-end encrypted. Ente is cross-platform. Ente is beautiful.
I use it personally and recommend it!
ente.io?utm_source=c...
Ente Photos: Store and share your photos with absolute privacy
Ente Photos is the private, secure photo storage app with end-to-end encryption. Cross-platform, open source, and self-hostable. Start with 10GB free.
ente.io
January 12, 2026 at 8:17 AM
This issue is sponsored by @ente.io!
Ente is an open-source platform to store photos, videos and more. Ente is end-to-end encrypted. Ente is cross-platform. Ente is beautiful.
I use it personally and recommend it!
ente.io?utm_source=c...
Ente is an open-source platform to store photos, videos and more. Ente is end-to-end encrypted. Ente is cross-platform. Ente is beautiful.
I use it personally and recommend it!
ente.io?utm_source=c...
Hippie dippie a newsletter is coming your way!
I've got some fresh, hand-crafted:
- Web links
- A joke
- A practice coding question
- Some bits and bobs and mooore!
Check out the archive and subscribe here:
cassidoo.co/newsletter/
I've got some fresh, hand-crafted:
- Web links
- A joke
- A practice coding question
- Some bits and bobs and mooore!
Check out the archive and subscribe here:
cassidoo.co/newsletter/
rendezvous with cassidoo
A weekly newsletter with web development content for everyone, from beginners to pros.
cassidoo.co
January 12, 2026 at 8:17 AM
Hippie dippie a newsletter is coming your way!
I've got some fresh, hand-crafted:
- Web links
- A joke
- A practice coding question
- Some bits and bobs and mooore!
Check out the archive and subscribe here:
cassidoo.co/newsletter/
I've got some fresh, hand-crafted:
- Web links
- A joke
- A practice coding question
- Some bits and bobs and mooore!
Check out the archive and subscribe here:
cassidoo.co/newsletter/
I've been following as many local individual journalists as possible. It seems to be working well?
January 12, 2026 at 7:19 AM
I've been following as many local individual journalists as possible. It seems to be working well?
Reposted by Cassidy
New year, new website.
Here's a little (big) write up about the evolution of my website, and some of the new fun things I built in the redesign.
p.s. please don't find any bugs, thank you
Here's a little (big) write up about the evolution of my website, and some of the new fun things I built in the redesign.
p.s. please don't find any bugs, thank you
I redesigned my website (again)
It's been almost 3 years since my last website redesign. Read about its evolution, new things in the redesign, and my quest to make my website more personal.
whitep4nth3r.com
January 9, 2026 at 7:17 PM
New year, new website.
Here's a little (big) write up about the evolution of my website, and some of the new fun things I built in the redesign.
p.s. please don't find any bugs, thank you
Here's a little (big) write up about the evolution of my website, and some of the new fun things I built in the redesign.
p.s. please don't find any bugs, thank you
This is sick, I love the view transitions
January 9, 2026 at 7:40 PM
This is sick, I love the view transitions
I wrote up this post after going through the Octoverse report for this past year!
It's super interesting and kind of obvious that because humans aren't writing as much code across codebases, they're leaning into stricter tooling that offers better reliability.
github.blog/ai-and-ml/ll...
It's super interesting and kind of obvious that because humans aren't writing as much code across codebases, they're leaning into stricter tooling that offers better reliability.
github.blog/ai-and-ml/ll...
Why AI is pushing developers toward typed languages
AI is settling the “typed vs. untyped” debate by turning type systems into the safety net for code you didn’t write yourself.
github.blog
January 9, 2026 at 1:22 AM
I wrote up this post after going through the Octoverse report for this past year!
It's super interesting and kind of obvious that because humans aren't writing as much code across codebases, they're leaning into stricter tooling that offers better reliability.
github.blog/ai-and-ml/ll...
It's super interesting and kind of obvious that because humans aren't writing as much code across codebases, they're leaning into stricter tooling that offers better reliability.
github.blog/ai-and-ml/ll...
Oh it's so good! Highly recommend it just as a nice place on the internet. It has a bunch of services attached that "just work" really well.
January 8, 2026 at 12:20 AM
Oh it's so good! Highly recommend it just as a nice place on the internet. It has a bunch of services attached that "just work" really well.
Reposted by Cassidy
Abolish and prosecute ICE. They did a murder in broad daylight today. Imagine what they're doing in the closed facilities we're somehow not even allowed to see.
January 7, 2026 at 6:20 PM
Abolish and prosecute ICE. They did a murder in broad daylight today. Imagine what they're doing in the closed facilities we're somehow not even allowed to see.
I use one! I don't update it as often as I probably could, usually around every 10 days or so!
cassidoo.omg.lol/now
cassidoo.omg.lol/now
What Cassidy's doing now
what is cassidoo up to
cassidoo.omg.lol
January 7, 2026 at 11:09 PM
I use one! I don't update it as often as I probably could, usually around every 10 days or so!
cassidoo.omg.lol/now
cassidoo.omg.lol/now
If you're wanting to pick up a new habit in the new year, consider checking out my newsletter's practice coding question each week!
The most recent issue:
buttondown.com/cassidoo/arc...
The most recent issue:
buttondown.com/cassidoo/arc...
January 7, 2026 at 9:26 PM
If you're wanting to pick up a new habit in the new year, consider checking out my newsletter's practice coding question each week!
The most recent issue:
buttondown.com/cassidoo/arc...
The most recent issue:
buttondown.com/cassidoo/arc...
my keynote will be me just saying, "I thought this was about how swiftly I could eat a deep dish"
📣 Keynote Speaker Announcement
We’re thrilled to have @cassidoo.co at Deep Dish 26 🎉
Chicago native & Senior Director of Developer Advocacy at GitHub, passionate about education and building the developer community.
She’s giving an opening keynote you won’t want to miss 😁
We’re thrilled to have @cassidoo.co at Deep Dish 26 🎉
Chicago native & Senior Director of Developer Advocacy at GitHub, passionate about education and building the developer community.
She’s giving an opening keynote you won’t want to miss 😁
January 7, 2026 at 9:24 PM
my keynote will be me just saying, "I thought this was about how swiftly I could eat a deep dish"
Reposted by Cassidy
📣 Keynote Speaker Announcement
We’re thrilled to have @cassidoo.co at Deep Dish 26 🎉
Chicago native & Senior Director of Developer Advocacy at GitHub, passionate about education and building the developer community.
She’s giving an opening keynote you won’t want to miss 😁
We’re thrilled to have @cassidoo.co at Deep Dish 26 🎉
Chicago native & Senior Director of Developer Advocacy at GitHub, passionate about education and building the developer community.
She’s giving an opening keynote you won’t want to miss 😁
January 7, 2026 at 5:47 PM
📣 Keynote Speaker Announcement
We’re thrilled to have @cassidoo.co at Deep Dish 26 🎉
Chicago native & Senior Director of Developer Advocacy at GitHub, passionate about education and building the developer community.
She’s giving an opening keynote you won’t want to miss 😁
We’re thrilled to have @cassidoo.co at Deep Dish 26 🎉
Chicago native & Senior Director of Developer Advocacy at GitHub, passionate about education and building the developer community.
She’s giving an opening keynote you won’t want to miss 😁
Reposted by Cassidy
I'm back on the writing train! Thanks @cassidoo.co for blogvent, because it got me sharing my writing consistently again and I needed that push. Yesterday I wrote some thoughts and observations about my garden in winter.
marisamorby.com/garden-thoug...
marisamorby.com/garden-thoug...
Garden Thoughts: January 5th
Thoughts today as I worked in the garden under the winter sun.
marisamorby.com
January 6, 2026 at 11:36 PM
I'm back on the writing train! Thanks @cassidoo.co for blogvent, because it got me sharing my writing consistently again and I needed that push. Yesterday I wrote some thoughts and observations about my garden in winter.
marisamorby.com/garden-thoug...
marisamorby.com/garden-thoug...
Did you know you can get your GitHub profile pic by adding .png to your profile page? It's super handy!
github.com/cassidoo.png
github.com/cassidoo.png
January 6, 2026 at 11:04 PM
Did you know you can get your GitHub profile pic by adding .png to your profile page? It's super handy!
github.com/cassidoo.png
github.com/cassidoo.png
I literally said "are you kidding me" out loud
January 6, 2026 at 9:01 PM
I literally said "are you kidding me" out loud
This made me so mad
Wordle 1,662 5/6
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🟨🟩🟨⬜⬜
⬜🟩🟩⬜🟨
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Wordle 1,662 5/6
⬜⬜⬜⬜⬜
⬜🟩⬜⬜⬜
🟨🟩🟨⬜⬜
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🟩🟩🟩🟩🟩
January 6, 2026 at 9:00 PM
This made me so mad
Wordle 1,662 5/6
⬜⬜⬜⬜⬜
⬜🟩⬜⬜⬜
🟨🟩🟨⬜⬜
⬜🟩🟩⬜🟨
🟩🟩🟩🟩🟩
Wordle 1,662 5/6
⬜⬜⬜⬜⬜
⬜🟩⬜⬜⬜
🟨🟩🟨⬜⬜
⬜🟩🟩⬜🟨
🟩🟩🟩🟩🟩
Reposted by Cassidy
