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Addy Osmani

@addyosmani.bsky.social

19K followers 390 following 440 posts

Engineering lead working on Google Chrome. I want you to win :) For more on what I'm up to, I'm at addyosmani.com

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Addy Osmani @addyosmani.bsky.social · Dec 5

✍️ "Hard truths about AI-assisted coding" tips & tricks in my latest article: bit.ly/ai-assisted

While AI-Assisted coding can get you 70% of the way there (great for prototypes or MVPs), the final 30% requires significant human intervention for quality and maintainability.

The 70% problem - hard truths about AI-Assisted Coding

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Addy Osmani @addyosmani.bsky.social · 1d

Thanks Kevin!

Reposted by Addy Osmani

Jason Grigsby @gri.gs · 3d

This history of Core Web Vitals by @addyosmani.bsky.social is a great read. addyosmani.com/blog/core-we...

The History of Core Web Vitals

This write-up is a history of how Core Web Vitals came to be based on my recollections from our work on it at Google from 2014 onwards

addyosmani.com

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Addy Osmani @addyosmani.bsky.social · 1d

Thanks Jason!

Addy Osmani @addyosmani.bsky.social · 22d

Our pleasure! We hope it's helpful!

Addy Osmani @addyosmani.bsky.social · 23d

Hope folks find DevTools MCP helpful!

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Addy Osmani @addyosmani.bsky.social · 23d

Announcing Chrome DevTools MCP! 🚀

Connect your AI coding agent to Chrome's powerful automation & debugging capabilities with ease.

Learn more: developer.chrome.com/blog/chrome-...

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Addy Osmani @addyosmani.bsky.social · 29d

Adulthood honestly looks great. Congrats on the solid reviews! Looking forward to watching

Reposted by Addy Osmani

Russ Poldrack @russpoldrack.org · Sep 16

This great piece by @addyosmani.bsky.social resonates strongly with my recent experience using AI coding agents

The 70% problem: Hard truths about AI-assisted coding

A field guide and why we need to rethink our expectations

addyo.substack.com

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Addy Osmani @addyosmani.bsky.social · Sep 13

✍️ How modern browsers work addyo.substack.com/p/how-modern... - my write-up on browser internals for web developers

How modern browsers work

A web developers guide to browser internals

addyo.substack.com

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Reposted by Addy Osmani

Michaux Kelley @mkelley33.com · Sep 5

Thank you @addyosmani.bsky.social for being the one to call out the distinction between vibe coding and AI assisted engineering. What a good read: open.substack.com/pub/addyo/p/...

Vibe coding is not the same as AI-Assisted engineering.

Can you really 'vibe' your way to production-ready software?

open.substack.com

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Reposted by Addy Osmani

Simon Willison @simonwillison.net · Sep 4

I spotted that @addyosmani.bsky.social's book on Vibe Coding is now re-titled to "Beyond Vibe Coding" - I think the new title is a huge improvement, really excited to read it when it comes out on 24th September simonwillison.net/2025/Sep/4/b...

Beyond Vibe Coding

Back in May I wrote Two publishers and three authors fail to understand what “vibe coding” means where I called out the authors of two forthcoming books on "vibe coding" …

simonwillison.net

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Reposted by Addy Osmani

peterkassenaar.bsky.social @peterkassenaar.bsky.social · Sep 4

For a some backgrounds on development of Google Chrome, see this excellent post by @addyosmani.bsky.social : addyosmani.com/blog/chrome-...

Google Chrome at 17 - A history of our browser

Chrome turns 17 this week, and it feels like a good time to reflect on how far we have come in terms of Chromes guiding principles

addyosmani.com

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Reposted by Addy Osmani

Jatin Thummar @jatinthummar.bsky.social · Aug 31

Patterns.dev — A free, 435+ page book and site on design, rendering, and performance patterns for modern web apps (vanilla JS and frameworks like React), by @lydiahallie.com and @addyosmani.bsky.social .

Patterns.dev

Learn JavaScript design and performance patterns for building more powerful web applications.

www.patterns.dev

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Addy Osmani @addyosmani.bsky.social · Aug 22

New in Chrome DevTools: Instantly check CSS feature compatibility with Baseline!

Chrome DevTools now displays the Baseline status for CSS properties right in the Elements panel - Baseline gives you clear info about which web features are ready to use today.

baseline status now inline on hover for css properties

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Addy Osmani @addyosmani.bsky.social · Jul 26

What would you like me to talk about more on here?

🛠️ Chrome DevTools and tooling
🕸️ Web Platform and new APIs
🤖 AI and AI-assisted Engineering
⛰️ Leadership and teams

...or all the above 😂

Let me know and I'll keep it in mind.

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Addy Osmani @addyosmani.bsky.social · Jul 26

Thanks for the really kind words on the book, Luke! It's really validating to hear the content resonates.

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Addy Osmani @addyosmani.bsky.social · Jul 14

super happy if it will be useful!

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Addy Osmani @addyosmani.bsky.social · Jul 14

New in ChromeDevTools: Debug complex CSS values more easily! 🎉

The Elements > Styles tab now shows a tooltip on hover with:

1. A step-by-step evaluation of complex CSS calculations to trace values back to their origin!

2. The full definition chain of CSS variables!

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Addy Osmani @addyosmani.bsky.social · Jun 8

New in Chrome DevTools: Gemini can modify and save CSS changes directly to your source!

✨ Modify and fix CSS within the Elements panel.
🧪 Instantly test changes live.
💾 Save changes back to your source files with a connected workspace folder.

Learn more: developer.chrome.com/blog/new-in-...

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Addy Osmani @addyosmani.bsky.social · May 31

Just published: "The Prompt Engineering Playbook for Programmers"

My latest free write-up: addyo.substack.com/p/the-prompt... ✍️

The Prompt Engineering Playbook for Programmers

Turn AI coding assistants into more reliable development partners

addyo.substack.com

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Addy Osmani @addyosmani.bsky.social · Apr 18

Thanks for the feedback! We can expand on the text to cover the indirect / userland aspects of Redux's influence here rather than suggesting it on its own is large.