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.

1. Launch HN: Reducto Studio (YC W24) – Build accurate document pipelines, fast
   85 points by adit_a 9 days ago | 55 comments
2. How We Use AI at Pulley (W20) (www.ignorance.ai)
   5 points by charlierguo 13 days ago | discuss
3. Weekly Cloud Info W25 – 2025 (weeklycloud.info)
   1 points by walidio 12 days ago | 1 comments
4. Launch HN: Empromptu.ai – Agentic AI Building AI Apps
   2 points by anaempromptu 5 days ago | discuss
5. KDE for Windows 10 Exiles – Upgrade your software, not your computer (kde.org)
   86 points by jlpcsl 29 days ago | 82 comments
6. Reflection for C++26 (www.open-std.org)
   8 points by frutiger 9 days ago | discuss
7. Trip June 2025 ISO C++ standards meeting (bannalia.blogspot.com)
   5 points by jcelerier 11 days ago | 1 comments
8. iOS 26 is terrible [video] (www.youtube.com)
   3 points by behnamoh 15 days ago | 2 comments
9. "Do Not Fold, Spindle or Mutilate": A Cultural History of the Punch Card [pdf] (www.cs.mun.ca)
   3 points by rbanffy 12 days ago | discuss
10. Standardizing Extended Integers in C++ (2018) [pdf] (www.open-std.org)
    2 points by 12_throw_away 27 days ago | discuss
11. Show HN: Lstr – A modern, interactive tree command written in Rust (github.com)
    227 points by w108bmg 14 days ago | 66 comments
12. Optimize CPU performance with Instruments – M4 branch level tracing [video] (developer.apple.com)
    1 points by w10-1 20 days ago | 1 comments
13. Launch HN: Vassar Robotics (YC X25) – $219 robot arm that learns new skills
    580 points by charleszyong 21 days ago | 219 comments
14. 215 Department Store Catalogs 1908-2019 (archive.org)
    39 points by bookofjoe 28 days ago | 3 comments
15. All-wheel drive EVs at 210 MPH? Formula E's next car gets upgrade (arstechnica.com)
    26 points by PaulHoule 9 days ago | 11 comments
16. UK tech job openings climb 21% to pre-pandemic highs (www.theregister.com)
    24 points by beardyw 27 days ago | 14 comments
17. Red Cross says at least 21 killed and dozens shot in Gaza aid incident (www.bbc.com)
    21 points by Jimmc414 29 days ago | 1 comments
18. Any Agent v0.21.0: Multi-turn conversations between AI agents via Google's A2A (github.com)
    8 points by AMeckes 7 days ago | discuss
19. You MUST Listen to RFC 2119 (ericwbailey.website)
    7 points by zdw about 3 hours ago | 1 comments
20. Notch Lost over $21B (blog.maxcomperatore.com)
    6 points by maxcomperatore 29 days ago | 11 comments
21. Pirate Site Visits Dip to 216B a Year, but Manga Piracy Is Booming (torrentfreak.com)
    6 points by t-3 21 days ago | discuss
22. 21 Day Experiment #2 – No Sugar (rory.codes)
    5 points by mrroryflint 16 days ago | 3 comments
23. PT Barnum's 21 Golden Rules for Making Money (www.skmurphy.com)
    5 points by skmurphy 7 days ago | 1 comments
24. You MUST listen to RFC 2119 (ericwbailey.website)
    5 points by mooreds about 16 hours ago | discuss
25. In 1966, Israeli Intelligence Convinced an Iraqi Pilot to Defect with His MiG-21 (daxe.substack.com)
    5 points by vinnyglennon 1 day ago | discuss
26. June 21 update for log_list.json breaks the auto update (github.com)
    5 points by mladenbl 10 days ago | discuss
27. Overflow Attacks in Telecommunications Hardware (CVE-2025-32105,06) [pdf] (github.com)
    5 points by doctorshady 26 days ago | discuss
28. Attack on Oxford City Council exposes 21 years of election worker data (www.theregister.com)
    4 points by rntn 12 days ago | discuss
29. Marking 21 Years of Covering Linux Hardware (www.phoronix.com)
    4 points by speckx 27 days ago | discuss
30. Wars and Casualties of the 20th and 21st Centuries (scaruffi.com)
    3 points by thomassmith65 18 days ago | 2 comments