Nicolas Carlo
@nicoespeon.com
🧹 I refactor Legacy Code and build tools to help you do the same!
✏️ understandlegacycode.com
🎩 Mr. Meetup Montréal • Software Crafters / React / TypeScript / Elixir
🍁 guild.host/montreal-tech/network
✏️ understandlegacycode.com
🎩 Mr. Meetup Montréal • Software Crafters / React / TypeScript / Elixir
🍁 guild.host/montreal-tech/network
Pinned
Nicolas Carlo
@nicoespeon.com
· Sep 17
Alright, let's make it official…
I am super-proud to tell you that I have finally published the print version of my book: "Legacy Code: First Aid Kit" 🎉 📕 🥲
I am super-proud to tell you that I have finally published the print version of my book: "Legacy Code: First Aid Kit" 🎉 📕 🥲
Currently reading "Mastering ast-grep"
leanpub.com/ast-grep
It's funny how this reads like an exhaustive documentation of the lib. Kinda smart to monetize it IMO.
Learning about AST and how to simply build some codemods is an interesting skill to have.
leanpub.com/ast-grep
It's funny how this reads like an exhaustive documentation of the lib. Kinda smart to monetize it IMO.
Learning about AST and how to simply build some codemods is an interesting skill to have.
Mastering ast-grep
The definitive guide to ast-grep: master structural code search, AST-based refactoring, and code transformation. From foundations to advanced techniques.
leanpub.com
February 11, 2026 at 2:36 PM
Currently reading "Mastering ast-grep"
leanpub.com/ast-grep
It's funny how this reads like an exhaustive documentation of the lib. Kinda smart to monetize it IMO.
Learning about AST and how to simply build some codemods is an interesting skill to have.
leanpub.com/ast-grep
It's funny how this reads like an exhaustive documentation of the lib. Kinda smart to monetize it IMO.
Learning about AST and how to simply build some codemods is an interesting skill to have.
Latest Abracadabra release fixed a bug, but also introduced "Extract to Instance Property" refactoring
Could be handy sometimes, if you are dealing with classes 😎
marketplace.visualstudio.com/items?itemNa...
Could be handy sometimes, if you are dealing with classes 😎
marketplace.visualstudio.com/items?itemNa...
February 6, 2026 at 3:18 PM
Latest Abracadabra release fixed a bug, but also introduced "Extract to Instance Property" refactoring
Could be handy sometimes, if you are dealing with classes 😎
marketplace.visualstudio.com/items?itemNa...
Could be handy sometimes, if you are dealing with classes 😎
marketplace.visualstudio.com/items?itemNa...
Reposted by Nicolas Carlo
MenderCon 2026 will happen in May…
👉 Aaaand our CFP is now open! sessionize.com/mendercon-20...
If there's a talk related to mending legacy codebases that you'd like to present, this is a great opportunity to do so 🙂
👉 Aaaand our CFP is now open! sessionize.com/mendercon-20...
If there's a talk related to mending legacy codebases that you'd like to present, this is a great opportunity to do so 🙂
MenderCon 2026: Call for Speakers
Focused ContentA full day focused on modernizing and improving software systems. From the smallest apps to the biggest enterprise monoliths. Find your...
sessionize.com
February 6, 2026 at 2:42 PM
MenderCon 2026 will happen in May…
👉 Aaaand our CFP is now open! sessionize.com/mendercon-20...
If there's a talk related to mending legacy codebases that you'd like to present, this is a great opportunity to do so 🙂
👉 Aaaand our CFP is now open! sessionize.com/mendercon-20...
If there's a talk related to mending legacy codebases that you'd like to present, this is a great opportunity to do so 🙂
Reposted by Nicolas Carlo
What does refactoring actually look like? Let's continue an example based on a real iOS view controller. Watch this 23-minute screencast. https://qualitycoding.org/refactoring-mvvm-part2/
Unlock Proven Steps of Refactoring to MVVM in Swift (Part 2)
What does refactoring actually look like? Let’s continue an example based on a real iOS view controller. 23-minute screencast.
qualitycoding.org
February 4, 2026 at 10:09 PM
What does refactoring actually look like? Let's continue an example based on a real iOS view controller. Watch this 23-minute screencast. https://qualitycoding.org/refactoring-mvvm-part2/
Reposted by Nicolas Carlo
If you got a standing desk but do not use it in standing position a lot, I suggest you to buy a treadmill.
Use it on low to mid speed while working at the same time, this way you do both a physical and mental activity
Use it on low to mid speed while working at the same time, this way you do both a physical and mental activity
January 31, 2026 at 11:41 AM
If you got a standing desk but do not use it in standing position a lot, I suggest you to buy a treadmill.
Use it on low to mid speed while working at the same time, this way you do both a physical and mental activity
Use it on low to mid speed while working at the same time, this way you do both a physical and mental activity
Reposted by Nicolas Carlo
It's not just "Human 🧒 vs. AI 🤖" these days when you're thinking about transforming legacy code on a larger scale.
That is why I visualized a part of the refactoring tools landscape using my favorite thinking tool: PowerPoint 🧡
That is why I visualized a part of the refactoring tools landscape using my favorite thinking tool: PowerPoint 🧡
January 27, 2026 at 2:58 PM
It's not just "Human 🧒 vs. AI 🤖" these days when you're thinking about transforming legacy code on a larger scale.
That is why I visualized a part of the refactoring tools landscape using my favorite thinking tool: PowerPoint 🧡
That is why I visualized a part of the refactoring tools landscape using my favorite thinking tool: PowerPoint 🧡
Looks like PaperCall (www.papercall.io) is broken and unmaintained
Back in October, I couldn't send rejection emails for /dev/mtl via the platform anymore. No news from support. Ended up doing that manually
Now trying to invite orgs on the platform for @mendercon.bsky.social, but they get no email
Back in October, I couldn't send rejection emails for /dev/mtl via the platform anymore. No news from support. Ended up doing that manually
Now trying to invite orgs on the platform for @mendercon.bsky.social, but they get no email
January 26, 2026 at 6:02 PM
Looks like PaperCall (www.papercall.io) is broken and unmaintained
Back in October, I couldn't send rejection emails for /dev/mtl via the platform anymore. No news from support. Ended up doing that manually
Now trying to invite orgs on the platform for @mendercon.bsky.social, but they get no email
Back in October, I couldn't send rejection emails for /dev/mtl via the platform anymore. No news from support. Ended up doing that manually
Now trying to invite orgs on the platform for @mendercon.bsky.social, but they get no email
New Abracadabra release, and I can now turn single-line comments into JSDoc ones in 2 keystrokes 🪄
Also, "Remove Redundant Else" is a bit better now
marketplace.visualstudio.com/items?itemNa...
Also, "Remove Redundant Else" is a bit better now
marketplace.visualstudio.com/items?itemNa...
January 23, 2026 at 2:16 PM
New Abracadabra release, and I can now turn single-line comments into JSDoc ones in 2 keystrokes 🪄
Also, "Remove Redundant Else" is a bit better now
marketplace.visualstudio.com/items?itemNa...
Also, "Remove Redundant Else" is a bit better now
marketplace.visualstudio.com/items?itemNa...
I want to highlight how *amazing* this move is, from conference organizers
Thus, we have decided to do the same with our (much more modest and very local) conference: www.dev-mtl.ca/transparency
Thus, we have decided to do the same with our (much more modest and very local) conference: www.dev-mtl.ca/transparency
January 15, 2026 at 5:42 PM
I want to highlight how *amazing* this move is, from conference organizers
Thus, we have decided to do the same with our (much more modest and very local) conference: www.dev-mtl.ca/transparency
Thus, we have decided to do the same with our (much more modest and very local) conference: www.dev-mtl.ca/transparency
For a while, I was using GitUp (gitup.co) for doing most of my git-related stuff
Features I'm looking for:
- Easy to get the big picture
- Easy to navigate quickly (e.g., keyboard shortcuts)
- Easy to "add patch" a few lines of a file
- Easy to rebase a branch (Alt+R) and undo anything (Ctrl+Z)
Features I'm looking for:
- Easy to get the big picture
- Easy to navigate quickly (e.g., keyboard shortcuts)
- Easy to "add patch" a few lines of a file
- Easy to rebase a branch (Alt+R) and undo anything (Ctrl+Z)
GitUp
GitUp is Git the way it should be
gitup.co
January 8, 2026 at 4:27 PM
For a while, I was using GitUp (gitup.co) for doing most of my git-related stuff
Features I'm looking for:
- Easy to get the big picture
- Easy to navigate quickly (e.g., keyboard shortcuts)
- Easy to "add patch" a few lines of a file
- Easy to rebase a branch (Alt+R) and undo anything (Ctrl+Z)
Features I'm looking for:
- Easy to get the big picture
- Easy to navigate quickly (e.g., keyboard shortcuts)
- Easy to "add patch" a few lines of a file
- Easy to rebase a branch (Alt+R) and undo anything (Ctrl+Z)
Reposted by Nicolas Carlo
Temporal is the Date system we always wanted in JavaScript. It's extremely close to being available so Mat Marquis thought it would be a good idea to explain exactly what is better about this new JavaScript date system.
piccalil.li/blog/date-is...
piccalil.li/blog/date-is...
Date is out, Temporal is in
Temporal is the Date system we always wanted in JavaScript. It's extremely close to being available so Mat Marquis thought it would be a good idea to explain exactly what is better about this new JavaScript...
piccalil.li
January 7, 2026 at 3:22 PM
Temporal is the Date system we always wanted in JavaScript. It's extremely close to being available so Mat Marquis thought it would be a good idea to explain exactly what is better about this new JavaScript date system.
piccalil.li/blog/date-is...
piccalil.li/blog/date-is...
It's a nice remote event happening in May!
Got things you'd like to share about working with legacy code? Submit your talk proposals in the CFP and you may become part of the lineup 😉
Got things you'd like to share about working with legacy code? Submit your talk proposals in the CFP and you may become part of the lineup 😉
MenderCon 2026 will happen online, on May 7
📢 If you want to present something related to working with legacy code, the CFP has open!
www.papercall.io/mendercon-2026
FYI, there will be 3 talks alongside open-space discussions. Talks will be recorded and published on YouTube afterwards 😉
📢 If you want to present something related to working with legacy code, the CFP has open!
www.papercall.io/mendercon-2026
FYI, there will be 3 talks alongside open-space discussions. Talks will be recorded and published on YouTube afterwards 😉
PaperCall.io - MenderCon 2026
# Focused Content
A full day focused on modernizing and improving software systems. From the smallest apps to the biggest enterprise monoliths. Find your people and learn here.
# Virtual Unconference...
www.papercall.io
January 7, 2026 at 3:14 PM
It's a nice remote event happening in May!
Got things you'd like to share about working with legacy code? Submit your talk proposals in the CFP and you may become part of the lineup 😉
Got things you'd like to share about working with legacy code? Submit your talk proposals in the CFP and you may become part of the lineup 😉
Reposted by Nicolas Carlo
Great short post from @mheap.dev: michaelheap.com/visibility-i...
It takes practice to deliver the right level of abstraction--too many details are not great.
But surprises are so so bad.
Even if Alice delivers a month later than Bob, people understand why and are more likely to accept it.
It takes practice to deliver the right level of abstraction--too many details are not great.
But surprises are so so bad.
Even if Alice delivers a month later than Bob, people understand why and are more likely to accept it.
Visibility is Velocity
Why visible progress beats speed: how incremental updates build trust, reduce risk, and change how complex product work is perceived.
michaelheap.com
January 7, 2026 at 12:58 PM
Great short post from @mheap.dev: michaelheap.com/visibility-i...
It takes practice to deliver the right level of abstraction--too many details are not great.
But surprises are so so bad.
Even if Alice delivers a month later than Bob, people understand why and are more likely to accept it.
It takes practice to deliver the right level of abstraction--too many details are not great.
But surprises are so so bad.
Even if Alice delivers a month later than Bob, people understand why and are more likely to accept it.
Reposted by Nicolas Carlo
I've seen this passed around a bunch and skimmed it and nodded in agreement (because obviously the new mac OS interface design is bad), but I didn't actually sit down and read the whole thing until just now.
God, it's just brutal.
tonsky.me/blog/tahoe-i...
God, it's just brutal.
tonsky.me/blog/tahoe-i...
It’s hard to justify Tahoe icons
Looking at the first principles of icon design—and how Apple failed to apply all of them in macOS Tahoe
tonsky.me
January 6, 2026 at 2:26 PM
I've seen this passed around a bunch and skimmed it and nodded in agreement (because obviously the new mac OS interface design is bad), but I didn't actually sit down and read the whole thing until just now.
God, it's just brutal.
tonsky.me/blog/tahoe-i...
God, it's just brutal.
tonsky.me/blog/tahoe-i...
Reposted by Nicolas Carlo
🪄 Jan 14th at 6PM: React MTL - Jan 2026
Join fellow Montreal geeks for a night of learning, food, and drinks at Shopify! ⚛️🍕
Falilou Khouma cooks up mobile apps with Expo, and Zoey Moore secures our React apps. 📱🛡️
Check it out 👉 https://guild.host/e/u9y55t
Join fellow Montreal geeks for a night of learning, food, and drinks at Shopify! ⚛️🍕
Falilou Khouma cooks up mobile apps with Expo, and Zoey Moore secures our React apps. 📱🛡️
Check it out 👉 https://guild.host/e/u9y55t
React MTL - Jan 2026
👥 Join us on Discord: discord.gg/kddEWbFhbc
Our wonderful sponsor: Shopify ⭐
\---
Rejoins-nous pour apprendre et échanger avec des développeurs et développeuses React & React Native de Montréal! Comme d'habitude, il y aura de la bonne nourriture et des boissons rafraichissantes!
Join us for an amazing fun evening and meet fellow Montrealer React & React Native geeks! As always, expect delicious food and refreshing drinks!
The talks of this event will be in English. We will have two presentations:
Falilou Khouma will discuss "Cooking mobile apps with React Native + Expo". Falilou is a full-stack developer with experience across the React ecosystem who enjoys building well-designed products and apps, with a strong passion for creativity.
Zoey Moore will talk about "Security in React applications - how to avoid common vulnerabilities". Zoey is a Full Stack Developer and Modern Web specialist.
guild.host
January 5, 2026 at 2:52 PM
🪄 Jan 14th at 6PM: React MTL - Jan 2026
Join fellow Montreal geeks for a night of learning, food, and drinks at Shopify! ⚛️🍕
Falilou Khouma cooks up mobile apps with Expo, and Zoey Moore secures our React apps. 📱🛡️
Check it out 👉 https://guild.host/e/u9y55t
Join fellow Montreal geeks for a night of learning, food, and drinks at Shopify! ⚛️🍕
Falilou Khouma cooks up mobile apps with Expo, and Zoey Moore secures our React apps. 📱🛡️
Check it out 👉 https://guild.host/e/u9y55t
Let's go 2026!
Starting with 2 events this month:
- Software Crafters MTL this Wed: guild.host/software-cra...
- React MTL next week: guild.host/events/react...
Starting with 2 events this month:
- Software Crafters MTL this Wed: guild.host/software-cra...
- React MTL next week: guild.host/events/react...
Software Crafters Montréal Upcoming Events | Guild
Discuss: slack.softwarecrafters.org (channel #loc\_montréal)
Past meetups notes: github.com/Software-Crafters-Montreal/meetups
Contact: cr
guild.host
January 5, 2026 at 2:53 PM
Let's go 2026!
Starting with 2 events this month:
- Software Crafters MTL this Wed: guild.host/software-cra...
- React MTL next week: guild.host/events/react...
Starting with 2 events this month:
- Software Crafters MTL this Wed: guild.host/software-cra...
- React MTL next week: guild.host/events/react...
I had a blast to present at JS Heroes in 2025. The organization is incredible 👌
I'm not submitting in 2026 because I'll have other priorities, but I can encourage you in doing so. Especially if you are in Europe 😉
I'm not submitting in 2026 because I'll have other priorities, but I can encourage you in doing so. Especially if you are in Europe 😉
We're entering the last hours of the CFP! 😱
Keep in mind the form closes at midnight Romania time, 11:00 CET so you can enjoy the New Year celebrations after wrapping up your proposal! 🎉
Happy New Year everyone! ❤️
Keep in mind the form closes at midnight Romania time, 11:00 CET so you can enjoy the New Year celebrations after wrapping up your proposal! 🎉
Happy New Year everyone! ❤️
⏳ The Call for Papers is closing soon!
If you haven’t submitted your proposal yet, you still have 3 days left to take your chance at joining us as a speaker at #JSHeroes 2026. 🌟
👉 jsheroes.io/speak
#TechEvent #TechConference #WebDev #TechInnovation
If you haven’t submitted your proposal yet, you still have 3 days left to take your chance at joining us as a speaker at #JSHeroes 2026. 🌟
👉 jsheroes.io/speak
#TechEvent #TechConference #WebDev #TechInnovation
December 31, 2025 at 6:35 PM
I had a blast to present at JS Heroes in 2025. The organization is incredible 👌
I'm not submitting in 2026 because I'll have other priorities, but I can encourage you in doing so. Especially if you are in Europe 😉
I'm not submitting in 2026 because I'll have other priorities, but I can encourage you in doing so. Especially if you are in Europe 😉
The Honey Files Expose Major Fraud!
YouTube video by MegaLag
www.youtube.com
December 31, 2025 at 3:12 AM
Reposted by Nicolas Carlo
Introducing Flint: a fast, friendly linter.
Flint is an experimental linter made to validate several hypotheses: hybrid linting, streamlined rich configuration, thorough docs & plugins, and tooling coordination.
Expect to hear more about Flint over the next month. ❤️🔥
www.flint.fyi/blog/introdu...
Flint is an experimental linter made to validate several hypotheses: hybrid linting, streamlined rich configuration, thorough docs & plugins, and tooling coordination.
Expect to hear more about Flint over the next month. ❤️🔥
www.flint.fyi/blog/introdu...
Introducing Flint
[Experimental] A fast, friendly linter. ❤️🔥
www.flint.fyi
December 30, 2025 at 9:40 PM
Introducing Flint: a fast, friendly linter.
Flint is an experimental linter made to validate several hypotheses: hybrid linting, streamlined rich configuration, thorough docs & plugins, and tooling coordination.
Expect to hear more about Flint over the next month. ❤️🔥
www.flint.fyi/blog/introdu...
Flint is an experimental linter made to validate several hypotheses: hybrid linting, streamlined rich configuration, thorough docs & plugins, and tooling coordination.
Expect to hear more about Flint over the next month. ❤️🔥
www.flint.fyi/blog/introdu...
Canada is so nice that if you can't take time to go ice skating, it brings the rink right in front of your door, driveway, sidewalk, road… ⛸️ ❄️ 🤣
#FreezingRain
#FreezingRain
December 30, 2025 at 3:38 PM
Canada is so nice that if you can't take time to go ice skating, it brings the rink right in front of your door, driveway, sidewalk, road… ⛸️ ❄️ 🤣
#FreezingRain
#FreezingRain
Reposted by Nicolas Carlo
Something something great minds thinking alike... #refactoring #evolutionarydesign
Different articulations of a mental model will click with different people, but those models tend to be much more alike than they are different. :)
Different articulations of a mental model will click with different people, but those models tend to be much more alike than they are different. :)
December 18, 2025 at 2:02 PM
Something something great minds thinking alike... #refactoring #evolutionarydesign
Different articulations of a mental model will click with different people, but those models tend to be much more alike than they are different. :)
Different articulations of a mental model will click with different people, but those models tend to be much more alike than they are different. :)
Reposted by Nicolas Carlo
it is the season of giving, so here is my gift to you:
`git checkout -`
you're welcome
`git checkout -`
you're welcome
December 16, 2025 at 5:06 PM
it is the season of giving, so here is my gift to you:
`git checkout -`
you're welcome
`git checkout -`
you're welcome
Reposted by Nicolas Carlo
Have you made any plans for 2026 yet? How about giving yourself or a friend something to look forward to...
...because we have exciting news before the winter break: Registration is now open for SoCraTes UK 2026!
Register: socratesuk.org/tickets.html
...because we have exciting news before the winter break: Registration is now open for SoCraTes UK 2026!
Register: socratesuk.org/tickets.html
SoCraTes UK - Tickets
Join us for another year of SoCraTes UK happening on June 18th - 21st! The event is hosted at Milton Hill House, UK which is surrounded by 22 acres of landscaped grounds and forest, delivering…
socratesuk.org
December 16, 2025 at 9:00 AM
Have you made any plans for 2026 yet? How about giving yourself or a friend something to look forward to...
...because we have exciting news before the winter break: Registration is now open for SoCraTes UK 2026!
Register: socratesuk.org/tickets.html
...because we have exciting news before the winter break: Registration is now open for SoCraTes UK 2026!
Register: socratesuk.org/tickets.html
Reposted by Nicolas Carlo
With the year wrapping up, nostalgia starts to kick in as we think back on all the inspiring talks we listened to. ✨
💡 If you’re looking for some tech insights to end the year with - or simply want to get nostalgic with us - check out all the 2025 talks here: bit.ly/3GEBiUf.
#JSHeroes #TechEvent
💡 If you’re looking for some tech insights to end the year with - or simply want to get nostalgic with us - check out all the 2025 talks here: bit.ly/3GEBiUf.
#JSHeroes #TechEvent
December 16, 2025 at 1:30 PM
With the year wrapping up, nostalgia starts to kick in as we think back on all the inspiring talks we listened to. ✨
💡 If you’re looking for some tech insights to end the year with - or simply want to get nostalgic with us - check out all the 2025 talks here: bit.ly/3GEBiUf.
#JSHeroes #TechEvent
💡 If you’re looking for some tech insights to end the year with - or simply want to get nostalgic with us - check out all the 2025 talks here: bit.ly/3GEBiUf.
#JSHeroes #TechEvent