Sunday · May 31, 2026

Morning Edition

Twenty stories from Hacker News and Pinboard Popular, curated for tech-leaning readers who care about Claude Code, the Apple ecosystem, and privacy.

In this issue

  1. Microsoft Office 2019 and 2021 for Mac view-only conversion
  2. Domain expertise has always been the real moat
  3. OpenRouter raises $113M Series B
  4. Openrsync: An implementation of rsync, by the OpenBSD team
  5. Please Do Not Vibe Fuck Up This Software
  6. Pandoc Templates
  7. Zig: Build System Reworked
  8. The AV2 Video Standard Has Released (Final v1.0 Specification)
  9. Parallel Reconstruction of Lawful TLS Wiretapping
  10. Voxel Space (2017)
  11. Shantell Sans (2023)
  12. I found a seashell in the middle of the desert
  13. Navier-Stokes fluid simulation explained with Godot game engine
  14. Show HN: 500 years of Joseon court omens as an observability dashboard
  15. Microcode inside the Intel 8087 floating-point chip: register exchange
  16. Cheese Paper: a text editor specifically designed for writing
  17. Jef Raskin, the Visionary Behind the Mac (2013)
  18. Show HN: Komi-learn – continuous memory and self-improvement for coding agents
  19. A Gentle Introduction to Lattice-Based Cryptography [pdf]
  20. Show HN: Breathe CLI – Paced resonance breathing in the macOS terminal

From Hacker News

Stories 1 – 10
No. 01New Apple AppsApplies to you

Microsoft Office 2019 and 2021 for Mac view-only conversion

Microsoft is forcing Mac users of Office 2019 and 2021 into view-only mode — effectively bricking paid perpetual licenses. If you're on macOS and haven't subscribed to Microsoft 365, your Word and Excel files are about to become read-only. A major consumer rights flashpoint with 295 comments worth reading.

No. 02AI ToolsApplies to you

Domain expertise has always been the real moat

As AI flattens general coding ability, the argument here is that deep domain knowledge is what separates great engineers from replaceable ones. A timely counter-narrative to the 'AI will do everything' hype — and a direct challenge to how AI coding tools are being marketed. One of the most-discussed threads this week.

No. 03AI ToolsApplies to you

OpenRouter raises $113M Series B

OpenRouter — the API aggregator that lets you switch between Claude, GPT, Gemini and dozens of other models with one endpoint — just raised $113M. If you're building AI workflows or using Claude Code, this is the infrastructure layer getting supercharged. Big validation for model-agnostic development.

No. 04Dev ToolsApplies to you

Openrsync: An implementation of rsync, by the OpenBSD team

The OpenBSD team has written a clean-room rsync implementation — and it's already shipping in macOS. This is the rsync you're using on your Mac right now, and understanding its lineage matters. A well-documented codebase worth reading if you do any serious file sync scripting.

No. 05AI ToolsApplies to you

Please Do Not Vibe Fuck Up This Software

An rsync maintainer opens a GitHub issue pleading with AI-assisted contributors not to submit vibe-coded pull requests that break decades of careful engineering. A raw, unfiltered perspective on what happens when AI coding tools meet critical open-source infrastructure. Essential reading for anyone using Claude Code on real projects.

No. 06Dev ToolsApplies to you

Pandoc Templates

A curated gallery of polished Pandoc templates for converting Markdown to beautiful PDFs, slides, and Word docs. If you're writing docs, specs, or notes in Markdown (or Obsidian), this is an immediate upgrade to your output pipeline. Actionable today.

No. 07Dev Tools

Zig: Build System Reworked

Zig's build system is getting a significant architectural rework — a big deal for a language that treats its build system as a first-class citizen. The devlog details the philosophy shift and what it means for cross-compilation and dependency management. Worth tracking if you follow systems languages.

No. 08Creative Software

The AV2 Video Standard Has Released (Final v1.0 Specification)

AV2, the successor to AV1, has hit v1.0 — promising dramatically better compression for video at the same quality. This will eventually flow into every streaming platform, browser, and video editing tool. The royalty-free codec wars just escalated.

No. 09Privacy & SecurityApplies to you

Parallel Reconstruction of Lawful TLS Wiretapping

A security researcher demonstrates how government-mandated TLS wiretapping backdoors can be reconstructed and potentially exploited by third parties. The 'lawful intercept' argument for weakening encryption gets a concrete technical refutation. Chilling and important.

No. 10Creative Software

Voxel Space (2017)

An interactive deep-dive into the voxel terrain rendering technique used in Comanche (1992) — explained with live demos running in the browser. The algorithm is elegantly simple and produces stunning results with minimal geometry. A delightful piece of graphics archaeology.

From Pinboard Popular

Stories 11 – 20
No. 11Creative Software

Shantell Sans (2023)

Shantell Sans is a hand-drawn variable font with a fascinating design process documented in detail — covering the collaboration between artist Shantell Martin and type designers. The behind-the-scenes look at variable font mechanics is genuinely educational for anyone who cares about typography and UI design.

No. 12Weird Science

I found a seashell in the middle of the desert

A developer in Saudi Arabia finds a seashell in the desert and goes full nerd — using geological data, historical sea-level records, and Python to figure out how it got there. Charming, methodical, and a great example of curiosity-driven personal science.

No. 13Creative Software

Navier-Stokes fluid simulation explained with Godot game engine

A beautifully written explainer that uses Godot as a sandbox to visualize Navier-Stokes equations step by step. If you've ever wanted to understand fluid simulation without a PhD, this is the most accessible route. Useful for creative coders and game devs alike.

No. 14Dev Tools

Show HN: 500 years of Joseon court omens as an observability dashboard

Someone mapped 500 years of supernatural omens recorded in Joseon Dynasty court records onto a modern observability-style dashboard — complete with SLOs and incident timelines. Absurdist and brilliant, but also a genuinely clever demonstration of dashboard UX applied to historical data.

No. 15Weird Science

Microcode inside the Intel 8087 floating-point chip: register exchange

Ken Shirriff is back with another silicon-level teardown, this time tracing how the 8087 FPU's microcode handles register stack exchanges. The level of detail — right down to transistor-level die photos — is staggering. Required reading for anyone who loves computer history.

No. 16Dev ToolsApplies to you

Cheese Paper: a text editor specifically designed for writing

Cheese Paper is a minimalist, distraction-free text editor built specifically for writing prose — not code. Think iA Writer's philosophy but with fresh design decisions. Worth a look if you write long-form content alongside your dev work or use Obsidian for notes.

No. 17New Apple AppsApplies to you

Jef Raskin, the Visionary Behind the Mac (2013)

A profile of Jef Raskin, the human interface visionary who originated the Mac project before Steve Jobs took it over. Resurfaces as a counterpoint to the Jobs mythology — Raskin's ideas about modeless interfaces and cognitive load are still more radical than most modern UI design. Great context for any Apple enthusiast.

No. 18AI ToolsApplies to you

Show HN: Komi-learn – continuous memory and self-improvement for coding agents

Komi-learn is an open-source framework that gives coding agents like Claude Code persistent memory and a self-improvement loop — so the agent learns from past mistakes across sessions. Early-stage but directly relevant to anyone building or using AI coding assistants. Worth watching.

No. 19Privacy & Security

A Gentle Introduction to Lattice-Based Cryptography [pdf]

With post-quantum cryptography standards now finalized, understanding lattice-based crypto is increasingly practical knowledge for security-aware developers. This PDF is unusually readable for a math-heavy topic, building intuition before equations. Bookmark it for a weekend deep-dive.

No. 20New Apple AppsApplies to you

Show HN: Breathe CLI – Paced resonance breathing in the macOS terminal

A tiny macOS terminal tool that guides you through paced breathing exercises right in your shell — no app switching required. Silly-sounding but genuinely useful for devs who live in the terminal and want a 60-second reset between focus sessions. Install it today.