I talk often about breaking out of walled gardens, that you don't have to be on corporate-web in order to be on the web.
This is a fantastic article about the problem and how to (pretty easily) fight it. Well worth reading.
Also, @strange.website is a rad human being.
henry.codes/writing/a-we...
Using Opus 4.5 I turned Claude Code and agent-browser into my personal AI lab and triggered differernt sub-agents and 'co-workers' to independently explore in a sandbox the best way to converge into a good set of guardrails, tools and CoT prompt autonomously
Full article here
dev.to/viniciusdall...
They converged on similar patterns I've seen other browsing agents use under the hood. But some of the findings and the process I took taught me quite a lot.
On the YT link you can see an early experiment of this browsing agent with Kernel.sh as the CDP session provider
youtu.be/yzzec2KFI7c
Instead, I carefully created an experiment on the problem. No shared context, no instructions and no specific method in mind and let them figure out how to drive a browsing session based on a goal independently.
I have a 'neuve' side project and I'll start writting more about it here.
This time the writeup brings some of my experience when developing the browsing aspect of, I stopped telling AI agents what to build.
I've actually used the learnings on how to compress trace information into a more token efficient format in a custom pipeline using Firecrawls's response (MD representation of a web page) into something more efficient, I'm calling CMD (Compressed Markdown DSL), but that's a writeup for another time.
I've written about my journey building PerfAgent and my learnigns on DevTools source code on last year's PerfCalendar:
calendar.perfplanet.com/2025/teachin...
What a banger of an article
developer.chrome.com/blog/designi...
Great job by the @developer.chrome.com team and as someone who has been very deep into the codebase and actually saw the evolution written in this article, and extracted it to build PerfAgent
Two screenshots from Chrome DevTools side-by-side. On the left it says "Before" and shows that rendering took 1518 milliseconds. On the right it says "After" and shows that rendering took 610 milliseconds.
Here's your friendly reminder that CSS selectors are global and evaluated RTL, so if you have selectors that are very broad like `.container > div` you might be impacting performance in a measurable way 🙈
Before and after profile of server switching after some selector optimizations in @discord.com
Wrapping up the year with my article for the Perf Calendar with my write up about how I ended up creating agent.perflab.io!
It has AI, it has Perf…what else could you want 😎🔥
I’m always happy to see my content in the Performance Calendar!
Thanks for the initiative @stoyan.me !
My gist “How Browsers Work” has been updated with a new post: “How modern browsers work” by @addyosmani.bsky.social
gist.github.com/nucliweb/c16...
#WebPerf #Browser #WebDevelopment
A link to join the web perf slack at performance.now()
No lies detected.
Quite the journey!
I’m super hyped and happy to announce that I’m getting even deeper into helping agents reason about software quality as I join QA.tech!
Since I’ve started working on PerfLab and then PerfAgent this has become an obsession. Now I get to do that full-time and I could not be more thrilled!
Having done the same mistake I can say that it is a lesson learned.
Screenshot of a table titled “Proposed plan”, showing some updates to speculative rules, from the doc linked in the next post
something very cool to see: Chrome recently shipped automatic <link rel="prefetch"> for all links in viewport
you could do it previously with libs like Quicklink, but it’s super cool to see this implemented natively
(it’s off by default, enabled with one html tag)
Wrapping up the writting part for my talk at @perfnow.nl this weekend and I'm beyond excited for this one. Prepare for a deep dive folks!
✨SPDY STREAM 010 ✨ with Jacob Groß
📢 As mentioned during yesterday's stream, Jacob is our next guest, and we shall cover tag mgmt and the deleterious effect they can have on performance, esp web vitals and possible solutions. Join us!
📆 Wednesday Sept 17th
⏰ 1PM EDT
🔗 bit.ly/spdy-stream-010
I'm also open for consuntancy, so reach out if you are looking to collaborate.
I've been building v0.perflab.io agent.perflab.io and other cool stuff, with V0 SDK, AISDK and Mastra
Also have interest on browsers and DevTools with my own projects and forks of it to ship my own autonomous agents.
Am currently trying to get my own thing off the ground prototyping an intersection of browsers and personal assistants and also autonomous coding agents that are capable of self improving.
Hit me up know if you know of any oportunities around 🫡
Hello everyone, I have just heard that the company I'm a lead engineer for is going to downsize so I'm going to look for the next thing from next week.
I'm looking to work with AI engineering and am shipping lots of different code automations and agent workflows.
I'm beyond excited to share a stage with so many great names! This is a special event to me and I'm super hyped to share a bit of my story with you all ❤️
Really excited to be speaking @perfnow.nl this year—my favourite conference run by some of my favourite people!
If you're into web performance (or wanna be!) and like a great conference with a super friendly vibe then pop along to Amsterdam at the end of October. Tickets selling fast!
perfnow.nl
Google’s @jackf.io is speaking at the London MCP Dev Summit 🎤
Topic: Lessons learned building the Chrome DevTools MCP Server
👉 Don’t miss it: buff.ly/MwmiH5E (early bird pricing ends in 2 days!)
#MCPservers #DevToolsAI
Whist trying out my demo for the Agentic Perf Analysis and Debugging, I managed to use my V0 and my DevTools MCP servers to debug one of my V0 demo chats.
Using animation frame insights no less 😃
performance.now() is coming to Amsterdam this October!
This event is great both for the inspirational talks as well as for the opportunity to meet folks from different companies and backgrounds to discuss how to successfully tackle web performance challenges!
performance.now(), the web performance conference, 30th and 31st of October, Amsterdam. Single track, the best speakers in the industry, plenty of your performance-mad peers around to have fascinating conversations. What's not to like?
https://perfnow.nl/
Gain insights from @webx.bsky.social at the past conference talk on #AnimationFrames, #INP, and #LoAF APIs for responsive web applications! #webdev
https://gitnation.com/contents/what-is-an-animationframe-and-what-can-it-tell-you
We're almost there!
After spending the week hacking OAuth support into Mastra MCP client class and getting the toolcall aproval workflow to an MVP state this sprint is soon coming to an end.
