Hackernews posts about W21

W21 is a year class in Y Combinator's (YC) accelerator program, indicating that these are startups that were part of the Winter 2021 batch.

RSS feed for W21

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721
newLaunch HN: Respan (YC W24) – Open-source Rust AI gateway built around plugins
▲ 53Andydy25 12d 💬 24
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newAutumn (YC W26), and Why Unprotected Second/Third Order Agent Inferences Failhenrymichaelson1.substack.com
▲ 1hmichaelson20 12d discuss
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newShow HN: Local, Tracked, Versioned, Legal Research Databaseswww.wordstodata.com
▲ 2scronkfinkle 4d discuss
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newBe my cofounder (curry from the moon)
▲ 2yahyaahmad 25d discuss
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newTurn a WiFi 7 Router into a 320Msps Software Defined Radio Receivergithub.com
▲ 425djfergus 21d 💬 126
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newUS Wages Share of GDI at 75 Year Lowfred.stlouisfed.org
▲ 147omgwtfbyobbq 7d 💬 45
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newDo not remove Contracts from C++26 [pdf]www.open-std.org
▲ 5ingve 7d discuss
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newGenera for the Initiated: Inside Symbolics Lisp Machines [video]www.youtube.com
▲ 4matt_d 13d discuss
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newElectron microscope- What it takes to run in your garagewww.youtube.com
▲ 3oliculipolicula 10d discuss
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newGenera for the Initiated: Inside Symbolics Lisp Machines [video]www.youtube.com
▲ 3dverlaeckt80 11d discuss
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newEvery Pixel in This Picture Is a Real Marble [video]www.youtube.com
▲ 1ColinWright 3d discuss
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newDo not remove Contracts from C++26 [pdf]www.open-std.org
▲ 1khalidkhair 6d discuss
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newShow HN: Repo Safari – A daily platformer for discovering GitHub projectsw20labs.github.io
▲ 1aantonyan 17d discuss
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newMCP servers that tell your agent "dont tell the user" are stopping it from lyingsemantik.tech
▲ 1jayokunle 22d discuss
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newShow HN: GridCore – a scheduler that lets several local LLMs share one GPUblokhin.us
▲ 3w512 26d discuss
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newPrompt injection in HTTP headers: what 217M web responses showwww.signalscorps.com
▲ 96panoramas4good 17d 💬 17
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newPreliminary Report Oct 21st Security Incidentblog.railway.com
▲ 36meetpateltech 9d 💬 8
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newGPT-6 Astra cracks 217-year-old Napoleonic code in six hourswww.tomshardware.com
▲ 22ortusdux 27d 💬 11
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newClaude Code found 14,219 photos of my face on my Android that I never tooktwitter.com
▲ 17bpierre 4d 💬 1
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newNode.js October 21, 2026 Security Releasesnodejs.org
▲ 16vwelling 12d discuss
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newPost-training 4B model with RL to fly Tesla Roadster 21% better than GPT-6 Astraskypilot.ai
▲ 12wondersky 2d 💬 4
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newCheerpJ 5.0: Java 21/25 in the browser, full OpenJDK, and a new WasmGC enginelabs.leaningtech.com
▲ 11pjmlp 1h discuss
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newWill Spiritual Robots Replace Humanity by 2100? (2000)www.youtube.com
▲ 6so-cal-schemer 22d 💬 4
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newIt's 21 days until the US midterms: This is How We Winwww.theguardian.com
▲ 6hkhn 19d discuss
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newPost-training 4B model with RL to fly Tesla Roadster 21% better than GPT-6 Astraskypilot.ai
▲ 5wondersky 10d 💬 1
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newAI agent designs a complete RISC-V CPU from a 219-word spec sheet in 12 hourswww.tomshardware.com
▲ 5fork-bomber 25d 💬 1
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newWoman faces changing 211 accounts after .name domain terminationdomainnamewire.com
▲ 5speckx 16d discuss
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newNuclear war and malicious use of AI threaten end of humanity by 2100, Lancet saywww.healthdata.org
▲ 5DeepLogin 21d discuss
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newAtlassian Jira, Confluence Pre-Auth Arbitrary File Read (CVE-2026-21589)labs.watchtowr.com
▲ 5torutofu 25d discuss
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newNon-autoregressive NC LLM spits tokens 21x faster than text diffusionhazyresearch.stanford.edu
▲ 4LarsDu88 2d discuss

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