Geert Theys
@geerttheys.com
Tech Lover and motorcycle builder/rider.
- Visit 🏠[my website](https://geerttheys.com)
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- Subscribe to my 📧 [newsletter](https://buttondown.com/refer/geert)
LLM improvements for coding are trickling in. But the tooling and workflows around spec driven agentic workflows are moving at a rapid pace.
open.substack.com/pub/geertthe...
open.substack.com/pub/geertthe...
Your LLM Is Fast. Your Workflow Isn’t.
Parallel specs, agentic tools, and the slow death of Jira for developer-first work.
open.substack.com
November 17, 2025 at 3:31 AM
LLM improvements for coding are trickling in. But the tooling and workflows around spec driven agentic workflows are moving at a rapid pace.
open.substack.com/pub/geertthe...
open.substack.com/pub/geertthe...
October 22, 2025 at 3:13 AM
LLM coding workflow:
- Wait on LLM to finalize detailed spec for review
- Wait on LLM to finalize the coding
- Wait on LLM for the codereview
- Codereview and test myself
- Create PR and wait on GH actions to finalize the checks
- Wait on codereviews
Lots of waiting and drinking coffee :)
- Wait on LLM to finalize detailed spec for review
- Wait on LLM to finalize the coding
- Wait on LLM for the codereview
- Codereview and test myself
- Create PR and wait on GH actions to finalize the checks
- Wait on codereviews
Lots of waiting and drinking coffee :)
September 23, 2025 at 7:40 AM
LLM coding workflow:
- Wait on LLM to finalize detailed spec for review
- Wait on LLM to finalize the coding
- Wait on LLM for the codereview
- Codereview and test myself
- Create PR and wait on GH actions to finalize the checks
- Wait on codereviews
Lots of waiting and drinking coffee :)
- Wait on LLM to finalize detailed spec for review
- Wait on LLM to finalize the coding
- Wait on LLM for the codereview
- Codereview and test myself
- Create PR and wait on GH actions to finalize the checks
- Wait on codereviews
Lots of waiting and drinking coffee :)
Advice from a senior software engineer to junior software engineers.
🛠️ From Vibe Coding to Real Engineering: How to Thrive with LLMs in Software Development
open.substack.com/pub/geertthe...
🛠️ From Vibe Coding to Real Engineering: How to Thrive with LLMs in Software Development
open.substack.com/pub/geertthe...
🛠️ From Vibe Coding to Real Engineering: How to Thrive with LLMs in Software Development
Practical advice for juniors and seniors on mastering fundamentals, design, and specs in the age of AI coding tools
open.substack.com
September 23, 2025 at 3:30 AM
Advice from a senior software engineer to junior software engineers.
🛠️ From Vibe Coding to Real Engineering: How to Thrive with LLMs in Software Development
open.substack.com/pub/geertthe...
🛠️ From Vibe Coding to Real Engineering: How to Thrive with LLMs in Software Development
open.substack.com/pub/geertthe...
Reposted by Geert Theys
Is it just me? I was a vicarious reader. But now everyone and their mother writes blogs, news letters and Linkedin posts. Mostly 1 single simple idea clobbered to 800 words written by an LLM. Losing interest reading stuff....maybe I need an LLM to summarize it all for me ;)
June 5, 2025 at 8:16 AM
Is it just me? I was a vicarious reader. But now everyone and their mother writes blogs, news letters and Linkedin posts. Mostly 1 single simple idea clobbered to 800 words written by an LLM. Losing interest reading stuff....maybe I need an LLM to summarize it all for me ;)
Sometimes I hope LLMS replace me. Just spent automating a script that converts SQL -> HCL to let our migration tool create SQL again to import it into our database.
Yes, because you know writing actual SQL is too hard for people.
Yes, because you know writing actual SQL is too hard for people.
May 27, 2025 at 8:23 AM
Sometimes I hope LLMS replace me. Just spent automating a script that converts SQL -> HCL to let our migration tool create SQL again to import it into our database.
Yes, because you know writing actual SQL is too hard for people.
Yes, because you know writing actual SQL is too hard for people.
So many new AI tools popup daily. Feels like the ISPs in the 2000s as I worked for several that are not existing anymore today. Only 2 major ones left.
Seems AI tools will go the same way.
Seems AI tools will go the same way.
Geert Theys on Substack
In the 2000s you got loads of ISPs connecting you to the internet. In my home country I worked for several of them. Now there are only 2 left.
AI tools seem to go the same way… Loads of them now….
substack.com
May 25, 2025 at 4:53 AM
So many new AI tools popup daily. Feels like the ISPs in the 2000s as I worked for several that are not existing anymore today. Only 2 major ones left.
Seems AI tools will go the same way.
Seems AI tools will go the same way.
My razer blade 16 with rtx4090 in windows can't last in a 1 hour video call on battery. Installed arc linux with hyprland. It doubled the battery runtime. Have a script to switch in powersafe mode with brightest and scene hz down and now it is triple. Also in idle the temp is 50C from 80+C.
May 17, 2025 at 4:12 AM
My razer blade 16 with rtx4090 in windows can't last in a 1 hour video call on battery. Installed arc linux with hyprland. It doubled the battery runtime. Have a script to switch in powersafe mode with brightest and scene hz down and now it is triple. Also in idle the temp is 50C from 80+C.
Biggest danger with LLMs is when you get into vibe coding. Meaning you don't read before you confirm code changing due to the massive input of stuff to read and you feel overwhelmed. Aider chat myu favorite tool has a --no-stream option which helps to slow down the pace!
#llm #aider #ai-tips
#llm #aider #ai-tips
May 5, 2025 at 3:14 AM
Maybe I should vibe code more often. Now I'm screaming to my screen so many times NO NO please don't when the LLM starts doing stuff in my codebase.
Just close my eyes and YOLO seems the better idea. Maybe it will surprise me in the end.
#llm #ai #vibecoding
Just close my eyes and YOLO seems the better idea. Maybe it will surprise me in the end.
#llm #ai #vibecoding
May 1, 2025 at 7:51 AM
Maybe I should vibe code more often. Now I'm screaming to my screen so many times NO NO please don't when the LLM starts doing stuff in my codebase.
Just close my eyes and YOLO seems the better idea. Maybe it will surprise me in the end.
#llm #ai #vibecoding
Just close my eyes and YOLO seems the better idea. Maybe it will surprise me in the end.
#llm #ai #vibecoding
American politicians seem to be excellent investors :S
🚨BREAKING🚨
I just released the full report on Congress trading in 2024.
Like every year since 2020, some US politicians beat the market.
From the start of 2024 to year end, many had unusual trades & huge portfolio gains.
Here are the top political traders of 2024.
I just released the full report on Congress trading in 2024.
Like every year since 2020, some US politicians beat the market.
From the start of 2024 to year end, many had unusual trades & huge portfolio gains.
Here are the top political traders of 2024.
April 10, 2025 at 6:31 AM
American politicians seem to be excellent investors :S
vibe coders are the new script kiddies ;)
March 30, 2025 at 2:44 AM
vibe coders are the new script kiddies ;)
When open protocols were a thing, I had one client aggregating all my messaging applications.
These days, I spend +5GB of RAM on electron apps for WhatsApp, Slack, Teams, Messenger, Element, Signal, and others.
Next to it, I sometimes can't remember which app was used for what communication.
These days, I spend +5GB of RAM on electron apps for WhatsApp, Slack, Teams, Messenger, Element, Signal, and others.
Next to it, I sometimes can't remember which app was used for what communication.
March 20, 2025 at 2:46 AM
When open protocols were a thing, I had one client aggregating all my messaging applications.
These days, I spend +5GB of RAM on electron apps for WhatsApp, Slack, Teams, Messenger, Element, Signal, and others.
Next to it, I sometimes can't remember which app was used for what communication.
These days, I spend +5GB of RAM on electron apps for WhatsApp, Slack, Teams, Messenger, Element, Signal, and others.
Next to it, I sometimes can't remember which app was used for what communication.
AI tools for coding are getting awesome. I use them a lot in support. Even the AI tools have code written in AI. But when you read closely, you will notice that NOT all the code is written with AI. Even the AI tool developers know that.
March 3, 2025 at 8:53 AM
AI tools for coding are getting awesome. I use them a lot in support. Even the AI tools have code written in AI. But when you read closely, you will notice that NOT all the code is written with AI. Even the AI tool developers know that.
As a software engineering leader, my major gripe with developers is that they do not have documentation or diagrams. When I'm coding with the assistance of cline, for example, I ask, and it delivers without complaining.
February 25, 2025 at 12:44 PM
As a software engineering leader, my major gripe with developers is that they do not have documentation or diagrams. When I'm coding with the assistance of cline, for example, I ask, and it delivers without complaining.
During my holiday break, I have been looking into digital independence. Due to recent international events, it seems something that should be considered. You can read all about it in my newsletter. Subscribe if you like the content. buttondown.com/geert/archiv...
Digital Independence: A Journey Through Tech Sovereignty
Dear subscribers, I am still on my yearly break, which I have been using to analyze my digital habits and move to a more independent digital life with a...
buttondown.com
February 25, 2025 at 8:28 AM
During my holiday break, I have been looking into digital independence. Due to recent international events, it seems something that should be considered. You can read all about it in my newsletter. Subscribe if you like the content. buttondown.com/geert/archiv...
I wanted a framework laptop but got a second-hand T480 instead. I am upgrading it to bring it into the new age and reverted to using Linux(Arch). After 7 years, I bought a new mobile—a second-hand Pixel Pro 8 (grapheneOs). I am going for sustainability AND more privacy. Slowly, I am also de-googling
February 13, 2025 at 6:44 AM
I wanted a framework laptop but got a second-hand T480 instead. I am upgrading it to bring it into the new age and reverted to using Linux(Arch). After 7 years, I bought a new mobile—a second-hand Pixel Pro 8 (grapheneOs). I am going for sustainability AND more privacy. Slowly, I am also de-googling
Sometimes I am baffled with people asking intimate relationship or even medical advice on social media.
February 11, 2025 at 2:55 AM
Sometimes I am baffled with people asking intimate relationship or even medical advice on social media.
Programming is such a cyclic activity. Everything needs to be a SPA now that MPA is back. There were loads of these things during my career. It seems even React is on the downtrend for simpler things.
February 5, 2025 at 1:42 AM
Programming is such a cyclic activity. Everything needs to be a SPA now that MPA is back. There were loads of these things during my career. It seems even React is on the downtrend for simpler things.
Once a Linux & self-hosted email purist, I got hooked on Google's ecosystem during the mobile era. Now, I'm trying to de-Google, but I'm realizing how deep the rabbit hole goes. 🔄
Email, photos, maps and android itself. Migrating is no easy feat. American developments scared me enough...
Email, photos, maps and android itself. Migrating is no easy feat. American developments scared me enough...
February 4, 2025 at 6:58 AM
Once a Linux & self-hosted email purist, I got hooked on Google's ecosystem during the mobile era. Now, I'm trying to de-Google, but I'm realizing how deep the rabbit hole goes. 🔄
Email, photos, maps and android itself. Migrating is no easy feat. American developments scared me enough...
Email, photos, maps and android itself. Migrating is no easy feat. American developments scared me enough...
Newsletter send out: "The Reality Check on LLM Evaluation Frameworks" - buttondown.com/geert/archiv...
I write on a semi-regular basis content on this topic. Would be awesome if you would subscribe.
I write on a semi-regular basis content on this topic. Would be awesome if you would subscribe.
The Reality Check on LLM Evaluation Frameworks
Update - February 2024: A notable development in LLM evaluation has emerged with a new coding benchmark (arXiv:2501.01257). While it adds to our testing...
buttondown.com
February 3, 2025 at 2:46 AM
Newsletter send out: "The Reality Check on LLM Evaluation Frameworks" - buttondown.com/geert/archiv...
I write on a semi-regular basis content on this topic. Would be awesome if you would subscribe.
I write on a semi-regular basis content on this topic. Would be awesome if you would subscribe.
Just bought a pixel 8 pro for 300usd. At that price it was a steal and still has years of updates ahead.
Protip: You'll save a lot more money on buying refurbished electronics, as opposed to buying the newest models.
January 30, 2025 at 4:38 AM
Just bought a pixel 8 pro for 300usd. At that price it was a steal and still has years of updates ahead.