Adam Marcus
@marcua.net
Hummus, people, and data. Co-Founder & CTO of B12. Previously Locu, MIT CSAIL. He/him.
https://marcua.net/
Queens is the future.
https://marcua.net/
Queens is the future.
My favorite spot for dhindo thali in Jackson Heights just got cooler!
A busy first day as your Mayor-elect: early morning interviews, transition announcements and meetings. More to say on all of it tomorrow.
But a highlight was lunch with my Congresswoman @aoc.bsky.social at Laliguras Bistro in Jackson Heights.
But a highlight was lunch with my Congresswoman @aoc.bsky.social at Laliguras Bistro in Jackson Heights.
November 6, 2025 at 4:36 AM
My favorite spot for dhindo thali in Jackson Heights just got cooler!
Reposted by Adam Marcus
Hey NYers, today is the day -- get out and vote!
November 4, 2025 at 5:44 PM
Hey NYers, today is the day -- get out and vote!
Reposted by Adam Marcus
Was honored to help @chana.bsky.social edit this deep dive compilation of Curtis Sliwa lore gathered over weeks. There is so much jaw-dropping material, we simply could not bear to make it shorter than 76 slides.
I’m sorry but you still don’t know enough about Curtis Sliwa
I’m sorry but you still don’t know enough about Curtis Sliwa
docs.google.com
November 3, 2025 at 3:58 AM
Was honored to help @chana.bsky.social edit this deep dive compilation of Curtis Sliwa lore gathered over weeks. There is so much jaw-dropping material, we simply could not bear to make it shorter than 76 slides.
Reposted by Adam Marcus
It's not enough but we've gotta do what we can. cityharvest.org here in NYC or Bowery mission are good options
October 25, 2025 at 4:53 AM
It's not enough but we've gotta do what we can. cityharvest.org here in NYC or Bowery mission are good options
Reposted by Adam Marcus
New short blog post, touching on how I'd redesign UUIDv7 to keep the database performance benefits while mitigating most of the downsides.
Short version: replace unix_ms with H(unix_ms, unix_ms >> 13 | salt).
Get yer extremely niche RFC commentary here: brooker.co.za/blog/2025/10...
Short version: replace unix_ms with H(unix_ms, unix_ms >> 13 | salt).
Get yer extremely niche RFC commentary here: brooker.co.za/blog/2025/10...
Fixing UUIDv7 (for database use-cases) - Marc's Blog
brooker.co.za
October 22, 2025 at 11:21 PM
New short blog post, touching on how I'd redesign UUIDv7 to keep the database performance benefits while mitigating most of the downsides.
Short version: replace unix_ms with H(unix_ms, unix_ms >> 13 | salt).
Get yer extremely niche RFC commentary here: brooker.co.za/blog/2025/10...
Short version: replace unix_ms with H(unix_ms, unix_ms >> 13 | salt).
Get yer extremely niche RFC commentary here: brooker.co.za/blog/2025/10...
This one made my brain move in many directions. Not sure I have some conclusive takeaway/worldview after reading it, but it felt good to sit with for a while: theoatmeal.com/comics/ai_art
A cartoonist's review of AI art - The Oatmeal
This is a comic about AI art.
theoatmeal.com
October 8, 2025 at 4:05 PM
This one made my brain move in many directions. Not sure I have some conclusive takeaway/worldview after reading it, but it felt good to sit with for a while: theoatmeal.com/comics/ai_art
Reposted by Adam Marcus
Social media feeds today are optimized for engagement, often leading to misalignment between users' intentions and technology use.
In a new paper, we introduce Bonsai, a tool to create feeds based on stated preferences, rather than predicted engagement.
arxiv.org/abs/2509.10776
In a new paper, we introduce Bonsai, a tool to create feeds based on stated preferences, rather than predicted engagement.
arxiv.org/abs/2509.10776
September 16, 2025 at 1:24 PM
Social media feeds today are optimized for engagement, often leading to misalignment between users' intentions and technology use.
In a new paper, we introduce Bonsai, a tool to create feeds based on stated preferences, rather than predicted engagement.
arxiv.org/abs/2509.10776
In a new paper, we introduce Bonsai, a tool to create feeds based on stated preferences, rather than predicted engagement.
arxiv.org/abs/2509.10776
Beautiful nostalgic piece by @adityagp.bsky.social! Don't miss the end for some nice reflections. Aditya's just getting started! :)
October 1, 2025 at 10:26 PM
Beautiful nostalgic piece by @adityagp.bsky.social! Don't miss the end for some nice reflections. Aditya's just getting started! :)
Reposted by Adam Marcus
My student Theia Henderson just presented at UIST (and earned a best paper award) for her work "Graffiti: Enabling an Ecosystem of Personalized and Interoperable Social Applications".
If you want to build a social app, Graffiti makes it simple and serverless; I explain why below.
1/
If you want to build a social app, Graffiti makes it simple and serverless; I explain why below.
1/
October 1, 2025 at 9:52 PM
My student Theia Henderson just presented at UIST (and earned a best paper award) for her work "Graffiti: Enabling an Ecosystem of Personalized and Interoperable Social Applications".
If you want to build a social app, Graffiti makes it simple and serverless; I explain why below.
1/
If you want to build a social app, Graffiti makes it simple and serverless; I explain why below.
1/
Reposted by Adam Marcus
ayb now includes a web frontend! I hope this expands the set of people that can use ayb.
The web interface lets you create databases, share them with collaborators, and query them from anywhere!
More here: blog.marcua.net/2025/09/27/a...
The web interface lets you create databases, share them with collaborators, and query them from anywhere!
More here: blog.marcua.net/2025/09/27/a...
September 27, 2025 at 4:56 PM
ayb now includes a web frontend! I hope this expands the set of people that can use ayb.
The web interface lets you create databases, share them with collaborators, and query them from anywhere!
More here: blog.marcua.net/2025/09/27/a...
The web interface lets you create databases, share them with collaborators, and query them from anywhere!
More here: blog.marcua.net/2025/09/27/a...
Reposted by Adam Marcus
📢📢 The September 2025 issue of SIGMOD Record is out, so is the Reminiscences column. Thank you, Viktor Leis, Anja Gruenheid, @senorcarbone.bsky.social, and @elenitz.bsky.social for the great contributions!
pdf --> sigmodrecord.org/publications...
pdf --> sigmodrecord.org/publications...
September 30, 2025 at 12:53 PM
📢📢 The September 2025 issue of SIGMOD Record is out, so is the Reminiscences column. Thank you, Viktor Leis, Anja Gruenheid, @senorcarbone.bsky.social, and @elenitz.bsky.social for the great contributions!
pdf --> sigmodrecord.org/publications...
pdf --> sigmodrecord.org/publications...
ayb now includes a web frontend! I hope this expands the set of people that can use ayb.
The web interface lets you create databases, share them with collaborators, and query them from anywhere!
More here: blog.marcua.net/2025/09/27/a...
The web interface lets you create databases, share them with collaborators, and query them from anywhere!
More here: blog.marcua.net/2025/09/27/a...
September 27, 2025 at 4:56 PM
ayb now includes a web frontend! I hope this expands the set of people that can use ayb.
The web interface lets you create databases, share them with collaborators, and query them from anywhere!
More here: blog.marcua.net/2025/09/27/a...
The web interface lets you create databases, share them with collaborators, and query them from anywhere!
More here: blog.marcua.net/2025/09/27/a...
Reposted by Adam Marcus
Eliana is a backend developer interested in data systems, looking for work based in NYC. She's a Recurse Center alumnus and has been an active member of NYC Systems and the Software Internals book club.
She's smart and thoughtful. Talk to Eliana.
RT for reach.
www.linkedin.com/in/eliana-ab...
She's smart and thoughtful. Talk to Eliana.
RT for reach.
www.linkedin.com/in/eliana-ab...
September 21, 2025 at 4:39 PM
Eliana is a backend developer interested in data systems, looking for work based in NYC. She's a Recurse Center alumnus and has been an active member of NYC Systems and the Software Internals book club.
She's smart and thoughtful. Talk to Eliana.
RT for reach.
www.linkedin.com/in/eliana-ab...
She's smart and thoughtful. Talk to Eliana.
RT for reach.
www.linkedin.com/in/eliana-ab...
From our first days in starting @b12.io, we've enabled customers to describe what they wanted and have us worry about how to get it done. With the AI Agent, this can happen near instantaneously. Really proud of the team for getting us here!
Your site should feel less like a to-do list & more like a collaborator. 🤝🏆
That’s why we built B12’s AI Agent. It does 30+ actions, including instantly adding pages, switching color palettes, & even writing blog posts.
Read more & take advantage of AI Agent in seconds: www.b12.io/blog/b12-ai-...
That’s why we built B12’s AI Agent. It does 30+ actions, including instantly adding pages, switching color palettes, & even writing blog posts.
Read more & take advantage of AI Agent in seconds: www.b12.io/blog/b12-ai-...
September 18, 2025 at 8:10 PM
From our first days in starting @b12.io, we've enabled customers to describe what they wanted and have us worry about how to get it done. With the AI Agent, this can happen near instantaneously. Really proud of the team for getting us here!
I've been thinking about this all day
September 17, 2025 at 11:51 PM
I've been thinking about this all day
Reposted by Adam Marcus
[new blog post]
Supporting our AI overlords: Redesigning data systems to be Agent-first
muratbuffalo.blogspot.com/2025/09/supp...
Supporting our AI overlords: Redesigning data systems to be Agent-first
muratbuffalo.blogspot.com/2025/09/supp...
Supporting our AI overlords: Redesigning data systems to be Agent-first
This Berkeley systems group paper opens with the thesis that LLM agents will soon dominate data system workloads. These agents, acting on b...
muratbuffalo.blogspot.com
September 17, 2025 at 5:28 PM
[new blog post]
Supporting our AI overlords: Redesigning data systems to be Agent-first
muratbuffalo.blogspot.com/2025/09/supp...
Supporting our AI overlords: Redesigning data systems to be Agent-first
muratbuffalo.blogspot.com/2025/09/supp...
Not something you see every day: while looking at a database cluster, I noticed that the "follower" machine had higher CPU utilization than the "primary." At some point, without us (and our customers) knowing, the primary failed over to the follower and was replaced. What a world.
September 17, 2025 at 1:42 PM
Not something you see every day: while looking at a database cluster, I noticed that the "follower" machine had higher CPU utilization than the "primary." At some point, without us (and our customers) knowing, the primary failed over to the follower and was replaced. What a world.
I appreciate @werd.io's notion of a career mission (his is "to work on and support projects with the potential to make the world more informed and equal.") as a way to guide one's technical skills toward positive change.
werd.io/using-techno... (h/t Mike Olson)
werd.io/using-techno... (h/t Mike Olson)
Using technology skills for positive change
Let's help build the world we want to see.
werd.io
September 10, 2025 at 2:55 PM
I appreciate @werd.io's notion of a career mission (his is "to work on and support projects with the potential to make the world more informed and equal.") as a way to guide one's technical skills toward positive change.
werd.io/using-techno... (h/t Mike Olson)
werd.io/using-techno... (h/t Mike Olson)
Reposted by Adam Marcus
Where is the Cursor for SQL?
CoQuery is a minimal vibe-coded SQL playground powered by SQLite WASM and Google Gemini language models. There is no backend, everything is in the webpage frontend.
github.com/arnabdotorg/...
CoQuery is a minimal vibe-coded SQL playground powered by SQLite WASM and Google Gemini language models. There is no backend, everything is in the webpage frontend.
github.com/arnabdotorg/...
August 26, 2025 at 9:41 PM
Where is the Cursor for SQL?
CoQuery is a minimal vibe-coded SQL playground powered by SQLite WASM and Google Gemini language models. There is no backend, everything is in the webpage frontend.
github.com/arnabdotorg/...
CoQuery is a minimal vibe-coded SQL playground powered by SQLite WASM and Google Gemini language models. There is no backend, everything is in the webpage frontend.
github.com/arnabdotorg/...
There's almost always a surprising nugget, usually multiple, in the acknowledgements section of a book/dissertation.
Here's one from Manning Marable's "Malcolm X: A Life of Reinvention," for which he was posthumously awarded a Pulitzer prize in history.
Here's one from Manning Marable's "Malcolm X: A Life of Reinvention," for which he was posthumously awarded a Pulitzer prize in history.
August 17, 2025 at 2:39 PM
There's almost always a surprising nugget, usually multiple, in the acknowledgements section of a book/dissertation.
Here's one from Manning Marable's "Malcolm X: A Life of Reinvention," for which he was posthumously awarded a Pulitzer prize in history.
Here's one from Manning Marable's "Malcolm X: A Life of Reinvention," for which he was posthumously awarded a Pulitzer prize in history.
Congratulations to @hmason.bsky.social and team! What a nice way to balance creative expertise and machine generation!
We’re launching early access 🔥today🔥!
Hidden Door is where roleplaying meets fanfic. Rise from the beyond to wreak vengeance in The Crow, go rivals-to-lovers in Pride & Prejudice, lean into after-dark vibes with Courtship & Crimson, and so many more!
Hidden Door is where roleplaying meets fanfic. Rise from the beyond to wreak vengeance in The Crow, go rivals-to-lovers in Pride & Prejudice, lean into after-dark vibes with Courtship & Crimson, and so many more!
Blog | Introducing Early Access · Hidden Door
We love stories! Books, movies, TV shows, comics, games: we love them all. But the thing about them is, well, they end—and when it’s over, it’s over. But what if you want to hold onto the magical feeling of that world? That experience of reliving the
www.hiddendoor.co
August 13, 2025 at 4:04 PM
Congratulations to @hmason.bsky.social and team! What a nice way to balance creative expertise and machine generation!
Reposted by Adam Marcus
Excited for this book. From @beenwrekt.bsky.social's blog post: "We decided people should make decisions like computers...The problem is, this decision was irrational. We can only optimize simple problems. Parlor games don’t describe how people behave."
I’m excited to announce that my new book, _The Irrational Decision_, is now available for pre-order from Princeton University Press.
The Irrational Decision
How the computer revolution shaped our conception of rationality—and why human problems require solutions rooted in human intuition, morality, and judgment
press.princeton.edu
August 4, 2025 at 3:10 PM
Excited for this book. From @beenwrekt.bsky.social's blog post: "We decided people should make decisions like computers...The problem is, this decision was irrational. We can only optimize simple problems. Parlor games don’t describe how people behave."
Build your website directly from Claude with the B12 Website Generator!
The B12 Website Generator is featured in Claude's connectors directory! 🎉
Install the B12 Website Generator desktop extension, then ask Claude to build a site for you! You'll get an entire website based on your business description.
Thank you @anthropic.com for including us!
Install the B12 Website Generator desktop extension, then ask Claude to build a site for you! You'll get an entire website based on your business description.
Thank you @anthropic.com for including us!
August 1, 2025 at 3:49 PM
Build your website directly from Claude with the B12 Website Generator!
Reposted by Adam Marcus
🚀 We've just open-sourced Embedding Atlas – a tool for exploring large embedding spaces through rich, interactive visualizations 📊.
August 1, 2025 at 8:24 AM
🚀 We've just open-sourced Embedding Atlas – a tool for exploring large embedding spaces through rich, interactive visualizations 📊.