Advertisement · 728 × 90

Posts by Addy Osmani

Preview
Comprehension Debt: The Hidden Cost of AI-Generated Code The following article originally appeared on Addy Osmani's blog site and is being reposted here with the author's permission.Comprehension debt is the

"The real problem wasn’t messy code. It was that no one on the team could explain why design decisions had been made or how different parts of the system were supposed to work together. The theory of the system had evaporated." New #Radar article by @addyosmani.bsky.social: bit.ly/41tTNSh

1 week ago 25 10 1 0
Preview
Your parallel Agent limit Running multiple agents in parallel is not just a question of throughput. It is a new kind of cognitive labor that requires managing multiple mental models, ...

@addyosmani.bsky.social's multi agent experience agrees with my own, going from 2 to 5 parallel agents is a quick way to transform from a judge to a ticket usher.

1 week ago 2 1 0 0

❤️❤️❤️

1 week ago 0 0 0 0

Old loop
open files ➡️ edit ➡️ build ➡️ debug

New loop
specify intent ➡️ delegate ➡️ observe ➡️ review diffs

1 month ago 3 3 1 0
A copy of “Web Performance Engineering in the Age of AI” by Addy Osmani placed on a light wooden surface, showing the cover with a greyhound illustration and a clean, minimalist design.

A copy of “Web Performance Engineering in the Age of AI” by Addy Osmani placed on a light wooden surface, showing the cover with a greyhound illustration and a clean, minimalist design.

An open book showing Chapter 3 titled “AI-Generated Code and the Performance Paradox,” with printed text discussing how AI-generated code can be functional but not always optimized for performance.

An open book showing Chapter 3 titled “AI-Generated Code and the Performance Paradox,” with printed text discussing how AI-generated code can be functional but not always optimized for performance.

An open book showing Chapter 12 titled “Web Performance Case Studies and Success Stories,” with text describing real-world examples of performance optimization and business impact.

An open book showing Chapter 12 titled “Web Performance Case Studies and Success Stories,” with text describing real-world examples of performance optimization and business impact.

Software is evolving fast.

My focus hasn’t changed: helping teams improve performance, UX, and conversion

AI generates working code faster than ever… but not optimized for performance

That’s where we add value: from “it works” to “it’s excellent”

Reading @addyosmani.bsky.social’s new book

2 weeks ago 9 3 0 0

Thanks for the support and I hope it's a good read!

2 weeks ago 1 0 1 0
Book cover - web performance in the ages of ai

With a greyhound on it

Book cover - web performance in the ages of ai With a greyhound on it

Started reading a new book on web performance and ai by @addyosmani.bsky.social

2 weeks ago 9 2 1 0
Advertisement
Illustration by Steve Yeggae

Illustration by Steve Yeggae

"The levels of AI adoption" - Orchestration requires a different skillset.

I spoke about orchestrating coding agents at O'Reilly AI CodeCon this week - here's the full free write-up + slides on what makes multi-agent coding works:

addyosmani.com/blog/code-ag...

Illustration by Steve Yeggae

3 weeks ago 40 7 12 0
Preview
The Factory Model: How Coding Agents Changed Software Engineering Software engineering is not about writing code anymore. It is about building the factory that builds your software.

The factory is a really good mental model to understand the direction of software engineering right now. I am pretty excited about it.
Good article by @addyosmani.bsky.social
addyosmani.com/blog/factory...

3 weeks ago 9 2 0 2
Preview
How modern browsers work A web developers guide to browser internals

I finally got around to read this, and oh boy. This is beautifully explained 😍. Thank you @addyosmani.bsky.social 🙏

addyo.substack.com/p/how-modern...

4 weeks ago 18 4 0 0
Preview
Death of the IDE? How Agent orchestration is replacing the editor as the center of developer work

How Agent orchestration is replacing the editor as the center of developer work - @addyosmani.bsky.social

addyo.substack.com/p/death-of-t...

1 month ago 7 2 0 0
Preview
Death of the IDE? How Agent orchestration is replacing the editor as the center of developer work

Death of the IDE? How Agent orchestration may be replacing the editor as the center of developer work.

open.substack.com/pub/addyo/p/... ✍️ my latest write-up

1 month ago 19 2 1 2

Thank you!

1 month ago 1 0 0 0
Preview
Comprehension Debt - the hidden cost of AI generated code.

We talk about the speed AI coding tools give us. We don't talk enough about the hidden cost: Comprehension Debt.

addyosmani.com/blog/compreh... ✍ I cover my thoughts on this in a new write-up.

1 month ago 85 27 5 4
Advertisement
Preview
AI Codecon - O'Reilly Media Join leading developers and technical experts as they share how AI is shaping new workflows, tools, and ways of building software.

Cohosted by @timoreilly.bsky.social and @addyosmani.bsky.social, AI Codecon on March 26 is focused on exploring what it takes to build excellent software in the age of AI that creates value for all participants. Register to save your free spot: bit.ly/4bDKyEH

1 month ago 1 1 0 0
Video

Announcing Gemini 3.1 Pro! Google's smarter model for your most complex tasks just shipped 🚀 A few web demos:

2 months ago 25 3 7 1

Thanks for the kind words!

2 months ago 2 0 1 0
Post image

AI users are working longer because, for the first time, our tools can finally keep pace with our imagination.

When output is cheap, your greatest leverage isn't how much you build, but the taste to know what is worth building - and the rest required to see the difference.

2 months ago 52 9 6 3

Thanks for reading! I'm so interested to see how fast (and how much) that 80%+ is going to get to 90% for real-world apps.

2 months ago 2 1 0 0
Preview
The Next Two Years of Software Engineering Exploring five critical questions shaping software engineering through 2026, with contrasting scenarios for each. These lenses help prepare for the evolving ...

The next two years of Software Engineering - addyosmani.com/blog/next-tw... ✍🏻

3 months ago 36 6 2 1
Preview
AI writes code faster. Your job is still to prove it works. AI did not kill code review. It made the burden of proof explicit. Ship changes with evidence like manual verification and automated tests, then use review f...

AI writes code faster. Your job is still to prove it works. - addyosmani.com/blog/code-re...

3 months ago 41 7 3 1
Preview
21 Lessons From 14 Years at Google Lessons learned from 14 years of engineering at Google, focusing on what truly matters beyond just writing great code.

Liked this observation from Addy Osmani:

“Abstractions don’t remove complexity. They move it to the day you’re on call.”

addyosmani.com/blog/21-less...

3 months ago 81 14 2 0
Preview
My LLM coding workflow going into 2026 Best practices for staying in control while coding with AI

My LLM coding workflow going into 2026: open.substack.com/pub/addyo/p/...

4 months ago 27 2 0 0

An absolute pleasure. Thanks for tuning in!

4 months ago 2 0 0 0
Advertisement

Happy to hear you enjoyed it so far! More to come!

4 months ago 1 0 0 0

I'm super happy to hear that resonated!

4 months ago 1 0 0 0

Thanks so much for the kind words!

4 months ago 0 0 0 0
Software engineering: efficiency vs. effectiveness
Software engineering: efficiency vs. effectiveness YouTube video by Google for Developers

Excited to share my new YouTube series on Software Engineering Effectiveness!

www.youtube.com/watch?v=lqcK...

4 months ago 61 4 5 3
Post image

"Critical thinking in the age of AI": addyo.substack.com/p/critical-t... ~ my latest write-up on the importance of retaining critical thinking skills during these times ✍️

4 months ago 42 4 1 0
Video

Why does "vibe coding" usually not lead to anything productive? A great person to answer is @addyosmani.bsky.social: working on Chrome for 10+ years, and is the author of the book Beyond Vibe Coding.

Watch or listen:

• YouTube: youtu.be/dHIppEqwi0g

• Spotify: open.spotify.com/episode/12dW...

5 months ago 63 4 4 4