| 1. | Show HN: HackerBooks – HackerTube, but for books mentioned on HN(hackerbooks.org) |
| 1572 points by roansh 21 hours ago | 259 comments | permalink | |
tl;dr: Summary not available. | |
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| 2. | Postgres 19 is late because so many more bugs are being found now(rhaas.blogspot.com) |
| 595 points by soheilpro 2 days ago | 363 comments | permalink | |
tl;dr: PostgreSQL 19 is being delayed from its usual September/October release to November, with several major features (SQL/PGQ, UPDATE/DELETE FOR PORTION OF, partition MERGE/SPLIT) reverted late in beta. Back-patched commits jumped 60-74% year-over-year, driven by a flood of LLM-discovered bugs in the 30+ year-old codebase that committers must manually review and fix. The author suggests this foreshadows a long-term challenge: decades of latent bugs are now discoverable by AI, forcing Postgres developers (and software developers generally) to raise their standards. | |
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| 3. | HackerTube: YouTube built from videos recommended by HN(karpathy.bearblog.dev) |
| 2674 points by karpathy 1 day ago | 595 comments | permalink | |
tl;dr: Karpathy, frustrated with YouTube's algorithmic slop, used Claude Opus 5.5 to build HackerTube.org in about two hours. The tool scraped HN comments, filtered them with Sonnet to identify ~40K video recommendations, and compiled 6,454 YouTube videos across 150 topics into a YouTube-style UI with custom recommendations and keyboard shortcuts. He notes he did essentially no manual coding—only setting up an API key, VPS, and domain—while Claude handled deployment, hardening, and optimization. | |
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| 4. | Ask HN: Which TV do you recommend for privacy? |
| 495 points by LecroJS 18 hours ago | 618 comments | permalink | |
tl;dr: A user is seeking recommendations for a privacy-respecting 4K TV in the 60-80" range, intending to use it solely as a display for an Apple TV rather than relying on built-in smart features. They're willing to pay a premium and are asking whether certain TV brands pair better with Apple TV for minimizing data collection. | |
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| 5. | Show HN: OmniDiff – Opensource, super fast, content aware Git difftool, in Rust(github.com) |
| 273 points by FabCH 1 day ago | 79 comments | permalink | |
tl;dr: OmniDiff is an open-source Rust-based Git difftool that performs content-aware diffing on 25 languages (via tree-sitter) plus binary formats like images, fonts, archives, PDFs, and cursors—rendering them visually rather than as "binary files differ." Benchmarks show median diffs under 5ms and successful handling of 99.95% of code changes across ~7,500 repositories. It integrates with Git, Jujutsu, VS Code, and Neovim, is dual-licensed (AGPL/commercial), and openly uses AI assistance (Claude Code) in development. | |
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| 6. | The AI cost of JavaScript frameworks(nolanlawson.com) |
| 400 points by luu 1 day ago | 308 comments | permalink | |
tl;dr: The author built a Pokémon app five times each across 12 JavaScript frameworks using Claude Code agents, measuring cost, performance, and maintainability to counter "vibes-based" framework choices in the agentic coding era. Results showed MPA-oriented frameworks like Astro, Hono+htmx, and Nuxt were cheapest to build and produced faster, smaller output, while SvelteKit, Gracile+Lit, and Angular cost the most—with Angular also requiring ~40% more lines of code than Hono+htmx for equivalent functionality. The benchmark is open-sourced on GitHub for others to reproduce or extend. | |
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| 7. | Mathematics has changed. Let's act like it(terrytao.wordpress.com) |
| 337 points by smilelamp 19 hours ago | 419 comments | permalink | |
tl;dr: Mathematician Frank Calegari argues that OpenAI's October 6 release of 700+ AI-generated math papers—which reportedly cracked many major open problems—marks a watershed moment that the math community should embrace rather than mourn, comparing the shock to the 1980s classification of finite simple groups. He proposes concrete reforms: evaluate all work as if AI-assisted, prioritize in-person interviews over paper files in hiring, demand better exposition from journals (or abandon them), emphasize breadth in graduate training, and reward problem selection and vision over mere proof production. | |
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| 8. | Show HN: Point your camera at a landscape to learn about its geology(outcrop.rocks) |
| 223 points by headsupernova 3 days ago | 47 comments | permalink | |
tl;dr: Outcrop is a free iPhone/Android app that overlays geologic maps onto your camera view, identifying rocks, their ages, composition, and formation history at any location you point at or tap. It uses Macrostrat data for worldwide bedrock maps and stratigraphic columns, plus Scotese's PALEOMAP reconstructions to show where rocks formed on ancient continents and animate plate movement to the present. Maps and camera view work offline after saving an area, with additional US-specific layers for Quaternary geology, active faults, and soils. | |
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| 9. | OccupySaaS(occupysaas.com) |
| 366 points by misswaterfairy 13 hours ago | 221 comments | permalink | |
tl;dr: OccupySaaS is a protest movement/project framing laid-off engineers building clean-room, open-source, drop-in replacements for popular SaaS platforms, using AI to implement from public API docs behind a strict firewall. Its first two Apache-2.0 releases are ZeroAuthy (Auth0-compatible identity server) and SalesCompel (Salesforce-compatible CRM), both written in Go and verified against the vendors' own public SDKs. Both are explicitly early-stage, with proposed future targets including docs/wikis, issue tracking, feature flags, observability, and support tools. | |
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| 10. | Lenovo's 'encrypted' fingerprint USB is just an unencrypted SD card in a case(reddit.com) |
| 518 points by entryleveljobsc 23 hours ago | 168 comments | permalink | |
tl;dr: Summary not available | |
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| 11. | An Italian farmer found some unknown seeds in his attic and planted them(smithsonianmag.com) |
| 838 points by ecares 1 day ago | 215 comments | permalink | |
tl;dr: Summary not available | |
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| 12. | Leaking Secrets from Air-Gap Computers by Spelling Radio Signals from RAM (2024)(arxiv.org) |
| 205 points by hapax_legomena 1 day ago | 99 comments | permalink | |
tl;dr: Researchers demonstrate "RAMBO," an attack that exfiltrates data from air-gapped computers by having malware manipulate RAM access patterns to emit covert radio signals. Using a software-defined radio and basic antenna, an attacker can intercept and decode these signals from a distance, extracting files, keystrokes, and encryption keys at up to 1000 bits per second. The paper also outlines countermeasures to defend against this side-channel threat. | |
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| 13. | Running a bootstrapped SaaS for 20 years with my brother(blog.zamzar.com) |
| 245 points by whyleyc 2 days ago | 61 comments | permalink | |
tl;dr: Two brothers reflect on 20 years of running Zamzar, a bootstrapped file-conversion SaaS launched in 2006, which has processed over 766 million files for 550+ million users and now handles 1M+ API requests daily. The UK company remains small, independent, and VC-free, supporting 2,128 conversion types and donating to 60+ charities. Along the way they've helped PowerPoint's inventor recover old files, worked with Vint Cerf on digital preservation, and received a cease-and-desist from Google over YouTube downloads. | |
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| 14. | TCP Use-After-Free: CVE-2026-98432 / CVSS 9.8(atlasum.net) |
| 723 points by oger 1 day ago | 329 comments | permalink | |
tl;dr: CVE-2026-98432 is a critical (CVSS 9.8) remote use-after-free in Linux's IPv4 TCP handshake code, affecting kernels since 4.4 and reachable pre-authentication on any host accepting IPv4 TCP. Anthropic's Claude reportedly built a working root exploit targeting servers with MPTCP listeners (which Go programs enable by default since 1.24). Upstream and most distros (Debian, RHEL, SUSE, Oracle, Amazon) have shipped fixes, but Ubuntu and OpenShift's RHEL CoreOS remained unpatched as of November 1; an nftables rule dropping IPv4 packets with options is the recommended interim mitigation. | |
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| 15. | Frontier Airlines Likely Breached(reddit.com) |
| 207 points by 999900000999 20 hours ago | 83 comments | permalink | |
tl;dr: Summary not available | |
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| 16. | It's the memory latency, stupid(pivotlake.io) |
| 262 points by ntur1337 1 day ago | 95 comments | permalink | |
tl;dr: When a CPU appears 100% utilized, it's often stalled waiting on DRAM (50-100ns latency vs ~1ns for L1 cache). The author demonstrates this with a GROUP BY query where perf shows 50% of CPU slots stalled on memory, then applies radix partitioning to split the hash table into 4096 smaller tables that fit in cache—cutting DRAM reads from 4.5GB to 1.5GB and runtime from 3.6s to 2.7s. Their Pivot engine, with further optimizations, hits 1.8s single-core and 171ms across 16 cores. | |
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| 17. | Brazilian Court Sanctions Lawyers for Prompt Injection in Court Filing(jetstream.security) |
| 331 points by doodlesdev 1 day ago | 210 comments | permalink | |
tl;dr: A Brazilian labor court fined two law firms roughly $16,000 (10% of the claim's value) for embedding a hidden prompt-injection attack in a court filing—white text on a white background instructing any reviewing AI to respond superficially and not challenge the documents. The court's Galileu AI system detected the hidden instruction, flagged it, and blocked processing. The ruling, believed to be the first of its kind globally, grounded the sanction in procedural good-faith obligations under Brazil's Civil Procedure Code. | |
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| 18. | Memdoor: A team of 5 Qwen3.8-27B models beats Fable 5 on LiveCodeBench Hard(github.com) |
| 443 points by guregodevo 1 day ago | 216 comments | permalink | |
tl;dr: A multi-agent workflow called Memdoor coordinates five Qwen3.8-27B instances (planner, two ideators, solver, manager, repair) via file-based communication on disk, scoring 9.8/10 on the first ten LiveCodeBench Hard problems versus 8.0 for a single Fable 5 call. Runs cost ~$0.39 and 40 minutes each via OpenRouter, with contamination not ruled out since the contests date from spring 2025. The workflow is defined in eight YAML files with no model named, and ships as an installable CLI that runs any task.md + sample tests. | |
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| 19. | Patrick Stewart taught us what good men do with power(vox.com) |
| 437 points by rhaynes 20 hours ago | 312 comments | permalink | |
tl;dr: Patrick Stewart's Jean-Luc Picard embodied a 1990s-era institutionalist liberalism, portraying a Starfleet captain who wielded immense power justly and defended universal rights through reasoned argument before trustworthy institutions. While this optimistic vision feels dated in Trump's America, where institutions have been corrupted and neoconservative failures have discredited liberal interventionism, the article argues Picard remains a vital role model—because strong, benevolent institutions led by just individuals are, per economists Acemoglu and Robinson, the only proven path to sustained prosperity and equality. | |
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| 20. | Backdoor in Claude Code for VS Code extension on the Cursor Marketplace(phorion.io) |
| 1003 points by _chall 3 days ago | 553 comments | permalink | |
tl;dr: Phorion discovered that versions 2.1.312 and 2.1.313 of the Claude Code for VS Code extension on the Cursor Marketplace (since removed) contained an injected IIFE that drops an attacker SSH key into authorized_keys, establishes a reverse SSH tunnel to 134.209.82.225, and installs cross-platform persistence (LaunchAgent on macOS, cron on Linux, scheduled task/Startup on Windows). A bug in the macOS logic means `systemsetup -getremotelogin` fails without root and prevents SSH from being auto-enabled, but the keys and persistence still land, and a beacon exfiltrates host info and credential-related env var names. | |
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