Pinned Tweet
One cool thing about working on a web framework is that the tools you use to build a feature might eventually adopt the feature itself. 5.5 years later, in this case.
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Sorry for libbing out on here for the first time in a while, but Republicans in the Obama era were so unbelievably annoying, I would accept five consecutive woke 1s before going back to that for a moment x.com/jmart/status/2…
The Cheesecake lunge is one part phantom limb stuff - 2026 version of Obama on price of arugula - and one part living off land’ism

Until Obama teed up the that line, the most consistent and reliable messaging from Repubs was on the presence of good looking men
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Replying to @acdlite
Republicans nowadays are also annoying but so is everyone else so it cancels out more
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Is it sufficiently ambitious?
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The unfolded iPhone Duo is my favorite device ever. The folded iPhone Duo makes me so anxious, for reasons I can't yet articulate.
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Replying to @acdlite
I love the weird squat dimensions of the outer screen. Instead of folding it into a chonky brick, I wish I could snap it in half and stick it back together.
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"Synthesize all the feedback I've given you so far into a rubric from which the feedback could be derived, then re-apply it to everything"

GOATed workflow (burns tokens fast, though)
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I get so giddy every time I outsmart Opus 5.5. Gotta enjoy this feeling while it lasts.
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Feature request for every agent harness: switch between the threads for me based on what most requires my attention. I'm tired of hunting for what to decide on next!
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Replying to @acdlite
The Projects feature in Claude Code is trending in this direction but in practice I still end up manually switching between threads constantly. But I can see the vision.
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Replying to @acdlite
Reordering the list is great but it's not enough, I want it to literally navigate to the thread without my intervention, like one of those DocuSign interfaces that zooms you to the next signature line x.com/antisymmetrics…
t3 chat reorder the list. Is this the feature you are talking about? Or a shortcut that allows to switch/toggle between conversations?
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I just discovered that v8's JIT doesn't inline Atomics. It uses the generic implementation every time.

a[1] → 2 instructions
Atomics.load(a, i) → ~130 (!!!)

Brutal 😫

Anyone who can help me get this fixed? Happy (to have an agent) send a patch!
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A decade ago, after struggling on a hard problem in React Fiber, I spent several days designing and iterating on a fuzz tester that eventually uncovered a bunch of subtle cases that helped me converge on a solution.

Today, a fuzz tester simply appeared in my codebase. Poof.
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Andrew Clark retweeted
Working in large established codebases is one of the hardest things to learn as a software engineer. You can’t practice it beforehand (no, open source does not give you the same experience).
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You Can See Everything:

The hype is justified. Just go see it fresh, don’t read any reviews that might spoil the experience.

All I’ll say is I felt every minute of its 3 hour runtime, but when it was over I wished it would keep going.
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Andrew Clark retweeted
Ahead of Next.js 16.4, I worked on applying the upcoming features across v0 and validating our new Partial Prefetching optimizer Skill in a real app.

The post includes before-and-after videos of the navigation experience and walks through the caching, prefetching, and production checks behind the refactor.

Excited to finally share it!
We used a coding agent with Next.js 16.4's new prefetching controls and Skill to improve v0's navigation experience at no added cost.

The loop:
• Capture navigation with 𝚒𝚗𝚜𝚝𝚊𝚗𝚝()
• Define the target UI in the test
• Refactor until it passes

nextjs.org/blog/improving…
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If your app is mostly static, but also mixes in user specific UI (e.g. a shopping cart), Next.js now has a really great solution for mixing both on the same page without surprise server costs. nextjs.org/docs/app/guide…
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I'm excited about <ViewTransition> in React but it's difficult for me to recommend because the web API has so many rough edges. E.g. scrolling during a transition is flat-out broken (and deemed a "wontfix" AFAICT)

Any browser friends who can help? github.com/w3c/csswg-draf…
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Replying to @acdlite
Turns out scoped View Transitions will help, thanks for the reply @jaffathecake x.com/acdlite/status…
This improves the situation significantly, can't wait for that to ship more widely. Will integrate into React ASAP. Thanks!
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