Kenta Iwasaki
416 posts
Kenta Iwasaki
@lithdew
Theorist at heart; engineer at scale. @thielfellowship @superpower @mozillabuilders
Joined Nisan 2020
49 Following1.1K Followers
i really have to move to a closet in a hellhole and spend all my time getting coffee with people who only know react don't i
himanshu@himanshustwts
something i've realized lately after talking to a bunch of people across the ai stack is as the technology is moving at the speed of light but the deals move at the nature of trust. and trust is still a deeply human thing. you can have the best infra or the best data pipeline or the most sophisticated tooling but if the person on the other side of the deal doesn't trust you, none of it matters and trust isn't scalable btw.
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Kenta Iwasaki retweeted
I'm usually not one to write thought pieces without much technical depth. But here we go.
Slow the fuck down.
mariozechner.at/posts/2026-03-…
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github.com/earendil-works…
github.com/earendil-works…
extreme alpha in these two repos imo
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Can't believe I got to build this with such a cracked team. Honored to be a part of @superpower ❤️.
Max Marchione@maxmarchione
Today, we share our AI doctor for the first time The future is an AI that knows more about your body than any human ever could. 247 commits. 140,000 lines of code. Months of engineering. Here it is:
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@saltyAom @isninkhamiss How ahout spawning a worker pool and terminating workers upon request? Another (though non-correct but generally sufficient) way is to statically instrument await points with interrupts (“stop point checks”).
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@isninkhamiss I don't think it's worth my time
We already have a partial fix with Sucrose by adding stop point check
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So from asking of Node Core Team and tc39 member and several talent people
The answer I got is: if the function is already ran, you can’t stop it
Other language also have this problem as well
If it’s as easy as it sounds, I won’t have been looking around for months believe me
SaltyAom@saltyAom
There should be a way to abort promises in JavaScript There's no way to stop running promises at all? Like, what if the client aborts the request? The function is still running, the database query is still going Wasted resources
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@dviolite @Hesamation The context and tools it provides i.e. codebase indexing, semantic grep, etc.
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@Hesamation I say this as someone who used Cursor until last month - I don’t get why people are using it other than not wanting to switch.
Claude has its own app. It’s there in VSCode. Same for ChatGPT/Codex.
What exactly is the value with Cursor now? The scaffolding on top of VSCode?
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Kenta Iwasaki retweeted
Postgres as data platform: make heterogeneity a first-class engine property—SLA-aware planning, pluggable execution, and machine-readable feedback (visibility, degradations, sources). Otherwise it's just storage+glue. noodata.substack.com/p/postgres-as-…
#PostgreSQL
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Made a PR to add support for Anthropic `search_result` blocks and custom content documents to @aisdk. Citations are fully supported.
cc @aayushkapoor_ @lgrammel github.com/vercel/ai/pull…
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@vanilagy I find these tools better for planning out an implementation by asking it to brainstorm multiple possible variations of code that best fits my given prompt/query.
Having it actually write code and files requires me to manually review its outputs which feels like a waste of time.
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This week is "giving Claude Code a fair shot" week, and holy shit, the conclusions from the first hour of use are:
It kinda sucks? For a mostly trivial task, Opus 4.5 spent 4 minutes (4 minutes!!) to do a simple "rename variable" operation, with half of all file edits failing. In the end it produced an inefficient and incorrect implementation, even though the bug can be clearly deduced solely by looking at the source code. Had to manually review its output three times to nudge it in the correct direction. All of this is with hand-written CLAUDE.mds and YOLO mode enabled.
After the constant CC glazing going on here, I'm seriously surprised. Where is the disconnect?
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In the latest version of `just-bash`
- ripgrep (rg) support
- tar support
- the ability to mount multiple filesystems into the same environment (thanks @izziaraffaele for the contribution)
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@ultima_centauri @mitsuhiko typeof e === ‘object’ && e && “errno” in e && typeof e.errno === ‘number’
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@mitsuhiko isn't `e` typed unknown there tho? u sure it dont need cast?
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Never been so proud ❤️ @jarredsumner
Anthropic@AnthropicAI
Anthropic is acquiring @bunjavascript to further accelerate Claude Code’s growth. We're delighted that Bun—which has dramatically improved the JavaScript and TypeScript developer experience—is joining us to make Claude Code even better. Read more: anthropic.com/news/anthropic…
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@badlogicgames 👀 able to hook up a fan of yours that used to make games with libgdx access to this SDK?
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My response: my god, it's full of stars.
Ya'll gonna love it, once he releases his latest oeuvre.
Armin Ronacher ⇌@mitsuhiko
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@asmah2107 Construct a B-Tree for each numeric/string facet type. Each B-Tree node tracks a range of the facet values it is representing (min/max/sketch) alongside a Roaring bitmap of product IDs it encompasses. Walk through the tree to perform a search. tl;dr construct a columnar index.
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Quick question:
You're building Amazon's search.
Users expect sub-second results while filtering by category, price, rating, and brand across billions of products.
Product data is constantly changing.
A single SQL query won't work. How do you design the search backend? 🛒
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