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Hacker News on October 21, 2026

On October 21, 2026, Trendoday checked Hacker News 96 times and recorded 139 different entries. “SimCity, but with Permits” ranked highest over the day: on the list in 68% of checks, best #2, average #3.2. “eMudhra intermediate CA compromise” and “Voxtral 3” followed. 0 entries were on the list at every check. 108 entries made their first appearance, led by “Eight Bits of Trust; eMudhra's CA keys cracked in…”.

  1. 1
    SimCity, but with Permits↗
    best #2 · avg #3.2
    68%of checks
  2. 2
    66%of checks
  3. 3
    Voxtral 3↗
    best #3 · avg #4.2
    68%of checks
  4. 4
    55%of checks
  5. 5
    59%of checks
  6. 6
    60%of checks
  7. 7
    59%of checks
  8. 8
    The Future of CSS↗
    best #3 · avg #10.9new
    64%of checks
  9. 9
    69%of checks
  10. 10
    60%of checks
  11. 11
    What shall I teach my son?↗
    best #7 · avg #9.3
    58%of checks
  12. 12
    64%of checks
  13. 13
    67%of checks
  14. 14
    54%of checks
  15. 15
    57%of checks
  16. 16
    43%of checks
  17. 17
    Good type against all odds↗
    best #7 · avg #18.1new
    59%of checks
  18. 18
    41%of checks
  19. 19
    46%of checks
  20. 20
    54%of checks
  21. 21
    40%of checks
  22. 22
    47%of checks
  23. 23
    39%of checks
  24. 24
    41%of checks
  25. 25
    33%of checks
  26. 26
    The Decoherence Trap↗
    best #9 · avg #19.6new
    45%of checks
  27. 27
    41%of checks
  28. 28
    ZX Spectrum Next Laptop↗
    best #17 · avg #21.3new
    46%of checks
  29. 29
    34%of checks
  30. 30
    28%of checks
  31. 31
    31%of checks
  32. 32
    EA is shutting down BioWare↗
    best #4 · avg #7.3new
    26%of checks
  33. 33
    Whatever Happened to Fire Escapes↗
    best #8 · avg #18.1new
    34%of checks
  34. 34
    32%of checks
  35. 35
    31%of checks
  36. 36
    25%of checks
  37. 37
    35%of checks
  38. 38
    46%of checks
  39. 39
    C# now beats Rust on WASM size↗
    best #14 · avg #20.3new
    31%of checks
  40. 40
    23%of checks
  41. 41
    28%of checks
  42. 42
    Four Years with Decker↗
    best #23 · avg #25.3new
    32%of checks
  43. 43
    20%of checks
  44. 44
    IKEA – 3D Guide↗
    best #14 · avg #16.1
    23%of checks
  45. 45
    30%of checks
  46. 46
    Claude Duet↗
    best #8 · avg #11.5new
    20%of checks
  47. 47
    28%of checks
  48. 48
    My Friend Bob Cringely↗
    best #13 · avg #14.3
    20%of checks
  49. 49
    25%of checks
  50. 50
    24%of checks

Also on the list that day (89)

The 1.5°C goal of the Paris Agreement is no longer viable · GitLab Remote Code Execution - Integer Overflow issue · The Lucrative World of Literary Scams · Canary Tokens · Borrow Checking Zero-Cost Cyclic Mutability · The bridge to agent-scale Git infrastructure · What the heck is /pkg? · Setting Up SSH Keys on macOS with Touch ID · Making Solar Panels with a Microwave [video] · Battlezone Online: BZFlag in the Browser · Google's Rust Style Guide · Why Windows 11 still ships with Windows 95's memory manager hidden… · Pillowfort Is Closing · Dutch National Cyber Security Center is Offline because it uses PHP · Composite objects and C++26 the std:polymorphic type · Benchmarking Bot Detection Systems Against Modern AI Agents in 2026 · Meta's GB{2,3}00 Cluster · Qwen3-Coder writes less secure code when told it's for a US persona · Show HN: Sumi.css – CSS Framework · Advanced coding in low-resource programming languages · Bonanza of new dates rewrites the history of the Inca · The No Kings Takedown Is Why You Shouldn't Rent Your Megaphone from… · Academics have a duty to defend open knowledge systems like Wikipedia · Most advice is right for the person giving it · LayerFS: The filesystem for AI coding agents · PingCap TiDB Leaks · Mistral Large 4 · A Place Among the Fiddlers · Claude Duet · Show HN: Dovepass – can I legally fly a drone along this exact path… · Facebook Pages require paid subscription to post more than two links… · No More Icons in Every Menu by Default · Trials and Tribulations of Native Lua Compilation · 2026 is an exciting year for the Rust compiler (and me) · JAXA is about to perform a Phobos sample return mission · PHP web runtimes (CVE-2026-109618 and CVE-2026-109619) · Launch HN: Respan (YC W24) – Open-source Rust AI gateway built… · Show HN: ULDA – Client-side encryption with a simple JavaScript API · 'Der Viener Schlinger': The meat cannon that launched 20k hot dogs · Railway Security Disclosure · Rust off Rails: The opinionated web stack for the AI era · Potential third critical PHP CVE · What I learned from six months of being stupid on purpose · Cloudflare deploys protections against php2shell vulnerability · PHP session.upload_progress heap UAF (CVE-2026-109618 / -109619) · Delays for Pull Requests and Webhook deliveries · Learning to live with Waymos · Anthropic's Public Benefit Charter · CleanFrame: A quieter home screen for Samsung The Frame · Does Ruby on Rails still make sense? · Nexus-CLI – Pure Go Bridge to DeepSeek R1/V3 with Claude Code and… · Meta hit with $25B penalty for deceiving users about privacy on… · Show HN: I told people I'm a convicted felon after 20 years of… · Ship Your Interpreter · PHP 8.5.12, 8.4.27, 8.3.36 and 8.2.35 out · After automation: Solo founding will be the default · The Rise and Fall of the Plasma Screen · A page looks innocent: the algorithms behind a typeset page · The compiler was supposed to end programming too · Plex laid off the whole player team · Shipping a LaTeX Compiler Behind an Edge App · Google staff resign in backlash over its AI contracts with military · A train simulator game for console hackers · MicroG: Free-libre re-implementation of Google's proprietary Android… · The phenomena that brighten dawn and dusk (2016) · LabRobotBench v0.1: Benchmarking wet lab robotics · Microagi: Accelerating Embodied AGI · AI agent fixed the bug, but what else did it change? · Corporate Linux · Despite Iran's Attacks, Gulf Oil Exports Exceed Prewar Levels · Alibaba hikes DeepSeek V4 Flash 0731 output prices by 230% · T3 Code starting move to GitCafe · GitHub package firewall · Show HN: Omnara – Open-Source Alternative to Claude Managed Agents · Finland Buying a Million Landmines · Code is clay now · Texas data center boom could erase decades of progress on air quality · PHP2Shell · Oracle Security Alert Advisory – CVE-2026-91403 (eMudhra cert… · Patch the Planet · Hazel (YC W24) Is Hiring · Publish fake stats, get cited in LLMs · Claude designed protein binders against scorpion neurotoxins · Overview of the german afd email leak · Open Source Games · CDC Ignored Request from States to Validate a New Measles Test · Cities Across the World Sinking from Groundwater Depletion: It Can… · SaaS Is Dead · Show HN: Linkit – AI bookmark manager, 100% free and open source

Ordered by average position weighted by how often the entry was on the list that day. Ranks are UTC days. All Hacker News archives

Part of week 43 and October 2026.