AI Summarized Hacker News

Front-page articles summarized hourly.

Why Leftover Pizza Might Be Healthier

Cooling cooked starches like pizza dough below 40°F forms resistant starch, long chains that resist digestion and act like fiber. Reheating does not erase this effect, so leftovers may blunt blood-sugar spikes and boost gut fiber. This phenomenon also applies to rice, pasta, potatoes, beans, and lentils; scientists study it with microscopy and human trials, noting that digestion begins in the mouth and that fridge storage can turn carbs into fiber-like material.

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Client-side GPU load balancing with Redis and Lua

Galileo improves GPU utilization and tail latency for real-time Luna-2 guardrails by replacing Kubernetes’ round-robin with a load-aware client-side balancer backed by Redis. Each client computes a load score (payload size) and selects the least-busy GPU, updating a global priority queue and per-GPU logs via Redis Lua scripts to ensure atomic acquire/release. A reconciler cleans stale requests; pods scale and fail gracefully. Results: ~40% higher average GPU utilization and up to 70% reduction in tail latency, especially for larger inputs. Lessons: client-side load balancing with Redis delivers high ROI; future cost-model refinements planned.

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'Extraordinary Discovery' at Orkney's Ness of Brodgar Neolithic Site

Archaeologists at Orkney's Ness of Brodgar are resuming excavation after ground-penetrating radar revealed an extraordinary anomaly unlike anything found before at the Neolithic site. The team says it could be non-Neolithic and may mark a new chapter in the site's history. The Ness, with structures dating 3500–2400 BC, is defined by straight lines and rectangular forms. The discovery, described as totally dissimilar to prior finds, will be investigated with a small trench ('keyhole surgery') and 3D site modelling. The site will reopen to the public for four weeks in July 2026; earlier buildings remain covered.

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Migrating Burningboard.net Mastodon Instance to a Multi-Jail FreeBSD Setup

Migration of burningboard.net Mastodon from Linux to a modular FreeBSD jail setup using BastilleBSD. Goals: central PF firewall, one service per jail (nginx, mastodonweb Rails, mastodonsidekiq, PostgreSQL/Valkey), dual-stack IPv4/IPv6 with no NAT66, private bridges, VNET, and a shared host Mastodon source via nullfs. Architecture: host PF gateway; four jails on separate bridges; RFC 5737/3849 address spaces. Bastille creates the jails; each jail runs FreeBSD rc.conf; host-managed logs and deployment kept simple. Benefits: predictable, auditable firewall, easy ZFS snapshots and jail-by-jail deployments; no Docker/systemd.

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Einstein: NewtonOS running on other operating systems

Einstein is a NewtonOS emulator that runs on macOS, iOS, and Ubuntu Linux, with partial support for Android, Raspberry Pi, and Windows. It requires a Newton ROM file (not distributed with the project); if you own a Newton device, you may dump your own ROM. See the "Dumping The Rom" guide and the downloads page. After setup, consult the user manual. Licensed GPL-2.0. The repository shows activity and stats: ~1,114 commits, 454 stars, 59 forks, 13 contributors, and code primarily in C/C++ with some assembly and other languages.

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12 Days of Shell

The page warns that JavaScript is disabled, which cmdchallenge requires, and mentions creating a reaction survey in the browser. It also points to View Solutions and Learn, and notes the site is built with love using jquery.terminal, Openmoji, and Golang, with Read more about cmdchallenge.

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Jujutsu Worktrees Are Convenient

Jujutsu workspaces let you have multiple folders with different states sharing one Git history, avoiding separate clones. Useful when a task stalls but you don’t want to stash. In JJ, run jj workspace add ../project-name-2 to create a second workspace; jj log shows which workspace edits which changes, and docs are available with jj workspace --help.

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Show HN: Lockenv – Simple encrypted secrets storage for Git

lockenv is a simple, CLI-based vault that lets you encrypt sensitive files (like .env and config) into a single .lockenv file for safe committing to version control. It’s designed as a lighter alternative to git-crypt or sops for small teams and IaC workflows. Files are encrypted with a password-derived key and unlocked when needed. Core commands: init, lock, unlock, status, diff, compact, keyring. It integrates with GitHub/GitLab CI and supports per-project setup, ignore rules, and glob patterns. Limitations: memory-heavy for large binaries and a single vault password.

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The f*** off contact page

This post recounts a redesign where a client created a 'fuck off contact page'—a page built to deter inquiries by burying human contact behind delays, a tactic sometimes used by large SaaS to push self-service. It undermines lead generation and user trust, yet the client was not convinced to change. The author links the move to discounted pricing, misaligned goals, and trust issues, and argues for educating clients about the design process and the value of user-centered outcomes. The piece ends with the author blogging to articulate values and attract like-minded clients.

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GitHub Actions Has a Package Manager, and It Might Be the Worst

GitHub Actions acts as a package manager but lacks essential security features: no lockfile, no integrity hashes, no transitive dependency visibility, no deterministic resolution, and no central registry. Each workflow re-resolves dependencies, enabling mutable tags and silent changes; composite actions obscure transitive deps. This undermines supply-chain security, as studies show widespread use of external actions with vulnerabilities and updates. Mitigations exist (immutable releases, SHA pinning, verified creators) but only partly help; lockfiles with full resolved SHAs and integrity checks would restore determinism and visibility. Other ecosystems (GitLab) have added integrity, while GitHub has not.

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Show HN: PVAC FHE over hypergraphs with LPN security

pvac_hfhe_cpp is a C++17 header-only PoC for pvac-hfhe: publicly verifiable arithmetic with hypergraph-based homomorphic encryption over the 127-bit prime field p = 2^127−1. It uses a dense random k-uniform hypergraph and parity-based assumptions. The repo includes examples, tests, and a minimal usage snippet showing key generation, encryption, homomorphic ops (add, sub, mul), and decryption, GPL-3.0.

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Applets Are Officially Gone, but Java in the Browser Is Better

Applets are officially retired with Java 26 (March 2026), ending the 1996–present era of plugins. Yet Java web apps survive without applets: TeaVM compiles Java to JavaScript/WASM, with a minifier, tree-shaker, and browser API wrappers. For full front-ends, Flavour—an open-source, Apache-2.0 SPA framework built on TeaVM—adds templates, components, routing, JSON handling, resource embedding, and security, all using HTML/CSS. Flavour emphasizes long-term compatibility and a stable API; docs include The Flavour Book and a podcast.

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Palantir Could Be the Most Overvalued Company That Ever Existed

Could not summarize article.

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Show HN: ReadyKit – Superfast SaaS Starter with Multi-Tenant Workspaces

ReadyKit is a fast SaaS starter that delivers multi-tenant workspaces, Stripe billing, OAuth, and production-ready UI blocks with zero boilerplate. It automates workspace isolation and query scoping, offering workspace switcher, roles, invites, and audit logs. Features include OAuth/MFA, passwordless, TOTP 2FA, RBAC, session hardening, and a modern UI kit with prebuilt screens. Setup is three commands: clone, configure keys, run with Flask or Docker. Tech stack: Python 3.11+, Flask 3, Vue 3, PostgreSQL, Redis, Celery, Stripe; Docker deployment. MIT licensed, free forever; you can ship commercial apps; optional billing hooks.

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Truemetrics (YC S23) Is Hiring

Truemetrics is hiring a Python Software Engineer – Analytics and Algorithms in Berlin (full-time). Salary $60k–$100k + 0.5%–1.5% equity; first hire reporting to the CTO, building AI-driven mapping to speed last-mile delivery. Responsibilities: data exploration, prototyping, algorithm improvement, and performance. Requirements: Berlin-based with valid permit; 4+ years in software engineering or data analysis; strong Python (3–5+ yrs) and AWS (Lambda/Athena/S3). Bonus: data/math, geospatial, routing, or time-series ML. Perks: hardware budget, fast-paced autonomy; YC-backed.

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Emacs Is My New Window Manager

Emacs doubles as a window manager by running in a minimal X session on a small Ubuntu VM. The author installs xinit and Emacs, sets .xinitrc to exec emacs, and uses (set-frame-parameter nil 'fullscreen 'fullboth) to run fullscreen. This lets him split the frame, launch programs (via M-! xterm), and edit within Emacs with full graphical features. For web work he uses w3m/eww inside Emacs, or an external browser via xdg-open. When needed, lightweight WMs like Ratpoison (preferred) or DWM are used; 2wm is cited as an ultra-minimal alternative. A sample setup-windows function automates layouts.

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(2018) How I created a database of all interesting Rush Hour configurations

Michael Fogleman details building a complete database of ‘interesting’ Rush Hour 6x6 puzzles with up to two walls. After solving and generating puzzles, he enumerates reachable states and keeps one canonical state per cluster using bitboards for fast checks. The approach avoids huge memory via pruning and clever ordering. The database contains 2,577,412 puzzles over 9,698,093,879 states; the largest cluster has 541,934 states; hardest puzzles require up to 60 moves. Implemented in Go and C++, with cloud computation; downloadable data and tools render, solve, visualize graphs, and play online.

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Damn Small Linux

Damn Small Linux 2024 (DSL 2024) is a compact x86 Linux distro reborn to run on old hardware and fit on a CD (≤700MB). Based on antiX 23 i386, it includes Fluxbox/JWM, four GUI browsers (Firefox-esr, NetSurf, Dillo, Links2) and office/multimedia tools (AbiWord, Gnumeric, Sylpheed, Zathura, MPV, XMMS) plus a rich set of terminal apps (Ranger, VisiData, FZF, Tmux, Mutt, Cmus, Htop, Vim/Nano, etc.). It aims for small size with low dependencies, enables apt, and provides a script to restore missing files; language support is trimmed. It honors Debian/antiX heritage.

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Impacts of working from home on mental health tracked in study of Australians

A Melbourne analysis of 20 years of HILDA data (about 16,000 Australians) finds hybrid work affects mental health by gender. Women with existing mental health issues gain most when mostly at home but with 1–2 on-site days; men’s mental health changes little, but wellbeing rises with shorter commutes (61→52 minutes from 2019 to 2023). In 2023, 65% did no hours from home; over a third did some WFH, and 27% worked at least one full day from home. Employers plan to keep hybrid work; HR Institute says productivity isn’t harmed and retention improves.

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The era of jobs is ending

AI and robotics are moving beyond experimentation to replace large swaths of routine work, threatening the social and psychological fabric built around jobs. Melonio argues that 'jobs' are a moral and existential architecture—identity, worth, time—not merely tasks. Ending the era of jobs will be messy and painful, but necessary. He calls for a transition: universal basic services, shorter work weeks, democratic ownership of automation, new communities and metrics of value (care, creativity, contribution), and therapy to weather withdrawal. The goal: emancipate human lives, not idle away time.

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