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Future of Cancer Care Today (FCCT)

Article URL: https://sijbrandijfoundation.org/fcct Comments URL: https://news.ycombinator.com/item?id=50098702 Points: 5 # Comments: 0

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The Double Headed Stack Allocator

Useful angle: memory and parallelism via allocator

Article URL: https://blog.demofox.org/2026/10/03/the-double-headed-stack-allocator/ Comments URL: https://news.ycombinator.com/item?id=50098274 Points: 24 # Comments: 2

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Tiny Little Office

Article URL: https://tinylittleoffice.com/ Comments URL: https://news.ycombinator.com/item?id=50096142 Points: 217 # Comments: 26

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OpenCode 2.0

Article URL: https://anoma.ly/notes/opencode-2-0/ Comments URL: https://news.ycombinator.com/item?id=50094994 Points: 383 # Comments: 163

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Fancy Curl Sites

Article URL: https://nytpu.com/gemlog/2026-03-18 Comments URL: https://news.ycombinator.com/item?id=50093612 Points: 96 # Comments: 17

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Things to know when you get cancer

Article URL: https://jjmaxwell4.com/writing/things-to-know-when-you-get-cancer/ Comments URL: https://news.ycombinator.com/item?id=50093568 Points: 941 # Comments: 229

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Suicide rates highest ever among middle-aged men

Article URL: https://www.telegraph.co.uk/news/2026/10/13/suicide-rates-highest-ever-among-middle-aged-men/ Comments URL: https://news.ycombinator.com/item?id=50093180 Points: 324 # Comments: 415

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Show HN: Petal, open-source CoScreen/ScreenHero finally free

Useful angle: systems performance via latency

Hi HN! I’m Jason Thomas, one of the founders of CoScreen. As some of you may know, Datadog sunset the CoScreen service on July 31st. Four of us from the original CoScreen team have spent the last couple months building a free and open source pair programming tool inspired by those that came before us: It’s called Petal (https://github.com/kiruna-labs/petal) Some history first, because when we started CoScreen we had hoped to break the sad and established pattern of this industry. Screenhero was an exceptional tool that a lot of us loved for pairing. Multiple cursors, low latency, you could click your partner’s editor, and just start typing. It felt like magic while we had it. Then Slack bought it in 2015, and shut down the standalone app in December 2017. When Till, Max, and I started CoScreen, we were aware of this history, and wanted to build an even more magical collaboration and screen sharing experience: the entire concept was “throw a window from your laptop up on someone else’s screen, and start collaborating with zero friction.” Datadog acquired us in 2022, and thus began the great adventure of adapting our real-time technology into Datadog products, while also continue developing CoScreen as a standalone tool from the Datadog ecosystem. Datadog invested in the product for years and we’re thankful for that. But CoScreen itself proved, like so many other screen sharing tool acquisitions, to be too tangential from the customer base and core mission. We instead built other communication features in Datadog, the integrations with other video platforms, and also its wildly successful MCP server. We weren't the only ones. Around was bought by Miro and shut down in March 2025. Multi (formerly Remotion) was acqui-hired by OpenAI in 2024 and shut down about a month later. It's nearly always the same story: a small team builds something hard that people love, a platform buys it for the team or the feature, and the standalone product doesn't survive the integration. So we decided firmly to do things differently this time. Petal is completely free and open source and we aren't monetizing it. If we lose interest or get hit by a bus, you can self-host it or fork it, and nobody can sunset it on you. Honestly it's a love letter to everyone in this community that supported us, believed in us, and to liberate collaborative screen sharing from this vicious cycle. We hope through this we can help foster a large and vibrant community around innovating in this product sector. What Petal does: shared windows show up as real windows on your desktop, movable and resizable, not tiles in a grid. Several people can share at once, everyone gets a labeled cursor, and you can click into any shared window to type and scroll. Rooms are persistent, so you click once to join "eng-sync" instead of passing links around. It runs on macOS and Windows (Linux is next, this time for real and you can help us!), plus a web app. Media goes over LiveKit. You can use our hosted instance with zero config, or point the app at your own LiveKit server with one docker-compose if you want the traffic to stay on your network or even use an entirely different video backend if you want to. The part that still feels strange to us: CoScreen took almost six years to build. The first version of Petal took under eight weeks, from scratch, with frontier models like Fable and Astra doing a lot of the work. Real-time video and window capture is some of the most unforgiving code we have ever written, so we didn't expect that. We will do a proper writeup on what worked and what didn't, and are happy to answer questions about it here. Till, Darren, Max and I will be in the thread. Comments URL: https://news.ycombinator.com/item?id=50092470 Points: 132 # Comments: 34

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Show HN: I wrote an email app that accepts only one sender per inbox

Infinite inboxes, including prefixes where you don't have to create inboxes before you use them -- they self create when you add a suffix. Three types of inboxes: - One sender. Locks to the first domain to send email (except gmail, outlook, etc where it locks to an email account for obivous reasons. It bounces everyone else. - Temporary. Lasts for a while (24h, 7days, etc) then bounces. Received messages stay or go as per your choice. - Prefix. The most powerful. Declare a prefix like "service" and then invent any suffix, like "service-netflix" or "service$bank" and it creates a new one-sender inbox locked to whoever wrote first. Bring you own domain. Bring your own AI (MCP server ready). Forwarding. Please help me test it. Comments URL: https://news.ycombinator.com/item?id=50090932 Points: 93 # Comments: 67

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Has AI tells

Article URL: https://theconsensus.dev/blog/2026/10/14/has-ai-tells.html?focus=1 Comments URL: https://news.ycombinator.com/item?id=50090799 Points: 92 # Comments: 80

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Better HTTP/1 connection reuse in Go 1.27

Article URL: https://go.dev/blog/http-connection-reuse Comments URL: https://news.ycombinator.com/item?id=50090369 Points: 217 # Comments: 30