Krzysztof Cieslak
@kcieslak.io
Artist 🎨 | Photographer 📷 | Globetrotter 🌍 | Speaker 🤹🏻♂️ | Author of Ionide 🚀 | Researcher @ Github Next 🔬| Co-creator of #GitHubCopilot, Copilot NES, Agentic Workflows, and [REDACTED] | Building the future of software development 💻
Pinned
Krzysztof Cieslak
@kcieslak.io
· Sep 7
👋 I’ve started new account - @kcieslak.space
📷 I’ll be using it with @flashes.blue for photography content - mostly travel, cycling, hiking etc.
💕 If you’re interested in stuff like that I’ll appreciate any follows and boosts.
📷 I’ll be using it with @flashes.blue for photography content - mostly travel, cycling, hiking etc.
💕 If you’re interested in stuff like that I’ll appreciate any follows and boosts.
Reposted by Krzysztof Cieslak
We're super jazzed to be launching GitHub Agentic Workflows into technical preview today!
"Generative AI" kind of fooled us into thinking that AI is synchronous, but async AI can have so much more value for us as developers. 🧵
github.blog/ai-and-ml/au...
"Generative AI" kind of fooled us into thinking that AI is synchronous, but async AI can have so much more value for us as developers. 🧵
github.blog/ai-and-ml/au...
Automate repository tasks with GitHub Agentic Workflows
Build automations using coding agents in GitHub Actions to handle triage, documentation, code quality, and more.
github.blog
February 13, 2026 at 8:46 PM
We're super jazzed to be launching GitHub Agentic Workflows into technical preview today!
"Generative AI" kind of fooled us into thinking that AI is synchronous, but async AI can have so much more value for us as developers. 🧵
github.blog/ai-and-ml/au...
"Generative AI" kind of fooled us into thinking that AI is synchronous, but async AI can have so much more value for us as developers. 🧵
github.blog/ai-and-ml/au...
Reposted by Krzysztof Cieslak
People who write X instead of Twitter are cringe
February 13, 2026 at 3:54 PM
People who write X instead of Twitter are cringe
We've just shipped something fun - Technical Preview of GitHub Agentic Workflows by @githubnext.com
Check out blog post from @dsyme.bsky.social and Peli de Halleux
github.blog/ai-and-ml/au...
Check out blog post from @dsyme.bsky.social and Peli de Halleux
github.blog/ai-and-ml/au...
Automate repository tasks with GitHub Agentic Workflows
Build automations using coding agents in GitHub Actions to handle triage, documentation, code quality, and more.
github.blog
February 13, 2026 at 2:07 PM
We've just shipped something fun - Technical Preview of GitHub Agentic Workflows by @githubnext.com
Check out blog post from @dsyme.bsky.social and Peli de Halleux
github.blog/ai-and-ml/au...
Check out blog post from @dsyme.bsky.social and Peli de Halleux
github.blog/ai-and-ml/au...
Reaction to "Spotify says its best developers haven't written a line of code since December, thanks to AI" article are kinda fascinating.
Reddit/HN is all like "haha, AI produces low quality code" or "that must be lie".
Meanwhile I'm sitting here just dispatching agents for 90% of my coding.
Reddit/HN is all like "haha, AI produces low quality code" or "that must be lie".
Meanwhile I'm sitting here just dispatching agents for 90% of my coding.
February 13, 2026 at 12:24 PM
Reaction to "Spotify says its best developers haven't written a line of code since December, thanks to AI" article are kinda fascinating.
Reddit/HN is all like "haha, AI produces low quality code" or "that must be lie".
Meanwhile I'm sitting here just dispatching agents for 90% of my coding.
Reddit/HN is all like "haha, AI produces low quality code" or "that must be lie".
Meanwhile I'm sitting here just dispatching agents for 90% of my coding.
Today will be a good day. 🙂
February 13, 2026 at 10:53 AM
Today will be a good day. 🙂
Reposted by Krzysztof Cieslak
After some *checks notes* umm.. 6 years, I released a new version of my composable data visualization library, adding support for images! compostjs.github.io/compost/demo...
I still think this is the best way of doing composable data visualizations. See the paper: www.cambridge.org/core/journal...
I still think this is the best way of doing composable data visualizations. See the paper: www.cambridge.org/core/journal...
February 9, 2026 at 12:28 PM
After some *checks notes* umm.. 6 years, I released a new version of my composable data visualization library, adding support for images! compostjs.github.io/compost/demo...
I still think this is the best way of doing composable data visualizations. See the paper: www.cambridge.org/core/journal...
I still think this is the best way of doing composable data visualizations. See the paper: www.cambridge.org/core/journal...
ClawBot (or whatever it’s called tonight) is just the beginning.
AI grifters will unleashed wave of agents for non-tech people, that will have 0 security, 0 control tools on what agents can do and will just spam all our communication channels, destroy trust and make our life worse.
AI grifters will unleashed wave of agents for non-tech people, that will have 0 security, 0 control tools on what agents can do and will just spam all our communication channels, destroy trust and make our life worse.
February 12, 2026 at 8:54 PM
ClawBot (or whatever it’s called tonight) is just the beginning.
AI grifters will unleashed wave of agents for non-tech people, that will have 0 security, 0 control tools on what agents can do and will just spam all our communication channels, destroy trust and make our life worse.
AI grifters will unleashed wave of agents for non-tech people, that will have 0 security, 0 control tools on what agents can do and will just spam all our communication channels, destroy trust and make our life worse.
Reposted by Krzysztof Cieslak
We created an exhibition to go along with my 𝐂𝐮𝐥𝐭𝐮𝐫𝐞𝐬 𝐨𝐟 𝐏𝐫𝐨𝐠𝐫𝐚𝐦𝐦𝐢𝐧𝐠 book! tomasp.net/cultures/exh...
It tells the story of how programming concepts methodologies emerge amidst clashes and collaborations between cultures.
🖼If you want to display this at your university or conference, let me know!
It tells the story of how programming concepts methodologies emerge amidst clashes and collaborations between cultures.
🖼If you want to display this at your university or conference, let me know!
Cultures of Programming - A Companion Exhibition to the Book
How interactions and disagreements between the different cultures of programming shaped programming concepts and methodologies that programmers use today, including programming languages, types and ob...
tomasp.net
February 12, 2026 at 1:26 PM
We created an exhibition to go along with my 𝐂𝐮𝐥𝐭𝐮𝐫𝐞𝐬 𝐨𝐟 𝐏𝐫𝐨𝐠𝐫𝐚𝐦𝐦𝐢𝐧𝐠 book! tomasp.net/cultures/exh...
It tells the story of how programming concepts methodologies emerge amidst clashes and collaborations between cultures.
🖼If you want to display this at your university or conference, let me know!
It tells the story of how programming concepts methodologies emerge amidst clashes and collaborations between cultures.
🖼If you want to display this at your university or conference, let me know!
I’m a believer in usefulness of AI but shit like this GitHub issue (and follow up) is just disgusting.
Tech bros trying to not be gross. Challenge impossible.
Tech bros trying to not be gross. Challenge impossible.
The Butlerian Jihad cannot come quickly enough. Also, stop anthropomorphizing chatbots.
github.com/matplotlib/m...
github.com/matplotlib/m...
[PERF] Replace np.column_stack with np.vstack().T by crabby-rathbun · Pull Request #31132 · matplotlib/matplotlib
This PR addresses issue #31130 by replacing specific safe occurrences of np.column_stack with np.vstack().T for better performance.
IMPORTANT: This is a more targeted fix than originally proposed. ...
github.com
February 12, 2026 at 1:19 PM
I’m a believer in usefulness of AI but shit like this GitHub issue (and follow up) is just disgusting.
Tech bros trying to not be gross. Challenge impossible.
Tech bros trying to not be gross. Challenge impossible.
All of those international sports organizations (FIFA, UEFA, IOC etc) are just mafia organizations connected to the rich and powerful.
Ukrainian skeleton racer Vladyslav Heraskevych is out of the Winter Olympics over a banned helmet honoring athletes killed in the war with Russia.
Ukraine's Vladyslav Heraskevych out of Winter Olympics over banned helmet honoring war dead
Ukrainian skeleton racer Vladyslav Heraskevych is out of the Milan Cortina Games after he refusesd to stop wearing a banned tribute helmet.
bit.ly
February 12, 2026 at 1:16 PM
All of those international sports organizations (FIFA, UEFA, IOC etc) are just mafia organizations connected to the rich and powerful.
Meet the team of superstars, and me!
The whole GitHub Next team is coming to London in March! And we're hosting a meet-up for anyone interested in the next generation of software eng tools
Sign-up here → luma.com/v5eltkec?tk=...
March 3rd at 6pm
We'll show our recent work & research, but also have open spots for community demos
Sign-up here → luma.com/v5eltkec?tk=...
March 3rd at 6pm
We'll show our recent work & research, but also have open spots for community demos
Speculative Software Engineering with GitHub Next · Luma
The pace of change in software engineering is absurd right now. If that makes you more excited than terrified, this is an evening for you.
Come join the GitHub…
luma.com
February 11, 2026 at 2:42 PM
Meet the team of superstars, and me!
Reposted by Krzysztof Cieslak
The whole GitHub Next team is coming to London in March! And we're hosting a meet-up for anyone interested in the next generation of software eng tools
Sign-up here → luma.com/v5eltkec?tk=...
March 3rd at 6pm
We'll show our recent work & research, but also have open spots for community demos
Sign-up here → luma.com/v5eltkec?tk=...
March 3rd at 6pm
We'll show our recent work & research, but also have open spots for community demos
Speculative Software Engineering with GitHub Next · Luma
The pace of change in software engineering is absurd right now. If that makes you more excited than terrified, this is an evening for you.
Come join the GitHub…
luma.com
February 11, 2026 at 2:12 PM
The whole GitHub Next team is coming to London in March! And we're hosting a meet-up for anyone interested in the next generation of software eng tools
Sign-up here → luma.com/v5eltkec?tk=...
March 3rd at 6pm
We'll show our recent work & research, but also have open spots for community demos
Sign-up here → luma.com/v5eltkec?tk=...
March 3rd at 6pm
We'll show our recent work & research, but also have open spots for community demos
Being FP developer was way more intellectually honest than being in AI space. No one was celebrating grift and hype over actual results and research.
February 11, 2026 at 11:49 AM
Being FP developer was way more intellectually honest than being in AI space. No one was celebrating grift and hype over actual results and research.
Reposted by Krzysztof Cieslak
As a person with a liberal arts education, I’m egotistically biased to strong agree with this.
But legit my whole day is just doing tons of critical thinking, meta thinking, and design thinking - the kind I learned in my crunchy lib arts school - in order to decide what to prompt the bots to make
But legit my whole day is just doing tons of critical thinking, meta thinking, and design thinking - the kind I learned in my crunchy lib arts school - in order to decide what to prompt the bots to make
February 10, 2026 at 9:27 PM
As a person with a liberal arts education, I’m egotistically biased to strong agree with this.
But legit my whole day is just doing tons of critical thinking, meta thinking, and design thinking - the kind I learned in my crunchy lib arts school - in order to decide what to prompt the bots to make
But legit my whole day is just doing tons of critical thinking, meta thinking, and design thinking - the kind I learned in my crunchy lib arts school - in order to decide what to prompt the bots to make
Reposted by Krzysztof Cieslak
Marx isn't just mildly disagreeing with the Luddites, he's saying their machine-breaking actively gave reactionary governments a pretext for repression. It was strategically counterproductive on top of being analytically wrong.
February 8, 2026 at 11:53 AM
Marx isn't just mildly disagreeing with the Luddites, he's saying their machine-breaking actively gave reactionary governments a pretext for repression. It was strategically counterproductive on top of being analytically wrong.
Reposted by Krzysztof Cieslak
Trump posting a meme depicting Black people as apes was totally about economic anxiety, y’all.
February 7, 2026 at 12:44 AM
Trump posting a meme depicting Black people as apes was totally about economic anxiety, y’all.
I guess this is my "why we will always need people in software development and AI can't replace them all" manifest
> Imagining something that's not here is harder, and few people can do it. How we will have truly new, unique and creative software if there are no people in software to imagine things
> Imagining something that's not here is harder, and few people can do it. How we will have truly new, unique and creative software if there are no people in software to imagine things
Operating system is kinda easy to imagine, there are plenty of those laying around. To a degree it's solved problem
Imagining something that's not here is harder, and few people can do it. How we will have truly new, unique and creative software if there are no people in software to imagine things
Imagining something that's not here is harder, and few people can do it. How we will have truly new, unique and creative software if there are no people in software to imagine things
February 5, 2026 at 8:01 PM
I guess this is my "why we will always need people in software development and AI can't replace them all" manifest
> Imagining something that's not here is harder, and few people can do it. How we will have truly new, unique and creative software if there are no people in software to imagine things
> Imagining something that's not here is harder, and few people can do it. How we will have truly new, unique and creative software if there are no people in software to imagine things
Reposted by Krzysztof Cieslak
02.02.2020 | Barcelona, Spain
Change of scenery; an old photo from one of my favorite cities in the world - Barcelona.
#photography #cityscape #architecture #street
iPhone 11 Pro Max
Change of scenery; an old photo from one of my favorite cities in the world - Barcelona.
#photography #cityscape #architecture #street
iPhone 11 Pro Max
February 5, 2026 at 12:30 AM
02.02.2020 | Barcelona, Spain
Change of scenery; an old photo from one of my favorite cities in the world - Barcelona.
#photography #cityscape #architecture #street
iPhone 11 Pro Max
Change of scenery; an old photo from one of my favorite cities in the world - Barcelona.
#photography #cityscape #architecture #street
iPhone 11 Pro Max
Reposted by Krzysztof Cieslak
How much longer are we gonna allow billionaires to wreck everything good?
February 4, 2026 at 2:33 PM
How much longer are we gonna allow billionaires to wreck everything good?
Reposted by Krzysztof Cieslak
01.09.2022 | Szczawnica, Poland
Some older landscape photography… #photography #landscape #nature #mountains
iPhone 13 Pro Max
Some older landscape photography… #photography #landscape #nature #mountains
iPhone 13 Pro Max
February 3, 2026 at 11:50 PM
01.09.2022 | Szczawnica, Poland
Some older landscape photography… #photography #landscape #nature #mountains
iPhone 13 Pro Max
Some older landscape photography… #photography #landscape #nature #mountains
iPhone 13 Pro Max
Reposted by Krzysztof Cieslak
30.01.2024 | Zakopane, Poland
Yet another old snowy landscape… #photography #landscape #winter #mountains #nature
iPhone 15 Pro Max
Yet another old snowy landscape… #photography #landscape #winter #mountains #nature
iPhone 15 Pro Max
February 3, 2026 at 12:20 AM
30.01.2024 | Zakopane, Poland
Yet another old snowy landscape… #photography #landscape #winter #mountains #nature
iPhone 15 Pro Max
Yet another old snowy landscape… #photography #landscape #winter #mountains #nature
iPhone 15 Pro Max
And yet the best value/quality combo on the market is OpenCode with Copilot subscription
"Earlier, all devs used GitHub Copilot.
9 months ago, we rolled out Cursor to all devs.
1.5 weeks ago, we rolled out Claude Code to everyone, and cancelled our Copilot subscription"
- CTO at a company with 600 engineers
(I hear this exact "transition" story, a LOT!)
9 months ago, we rolled out Cursor to all devs.
1.5 weeks ago, we rolled out Claude Code to everyone, and cancelled our Copilot subscription"
- CTO at a company with 600 engineers
(I hear this exact "transition" story, a LOT!)
February 2, 2026 at 9:42 PM
And yet the best value/quality combo on the market is OpenCode with Copilot subscription
Reposted by Krzysztof Cieslak
> tailscale is the secure way to connect all your computers!
> i've used tailscale to connect my molty to all my computers and internal services and gave it all my keys
oh no, not like that
> i've used tailscale to connect my molty to all my computers and internal services and gave it all my keys
oh no, not like that
January 30, 2026 at 10:11 PM
> tailscale is the secure way to connect all your computers!
> i've used tailscale to connect my molty to all my computers and internal services and gave it all my keys
oh no, not like that
> i've used tailscale to connect my molty to all my computers and internal services and gave it all my keys
oh no, not like that
Reposted by Krzysztof Cieslak
You're telling me the AGI grifters, who are willing to give an LLM based agent that manufactures scenarios and is easily compromised unfettered access to their computer and sensitive data, don't understand basic security principles?! You don't say!
'It exploded before anyone thought to check whether the database was properly secured.'
Exposed Moltbook Database Let Anyone Take Control of Any AI Agent on the Site
'It exploded before anyone thought to check whether the database was properly secured.'
www.404media.co
February 1, 2026 at 10:00 AM
You're telling me the AGI grifters, who are willing to give an LLM based agent that manufactures scenarios and is easily compromised unfettered access to their computer and sensitive data, don't understand basic security principles?! You don't say!