Top 10 Hacker News — Top Stories — April 5, 2026

An archived 2009 PDF textbook on computer music theory, reaching #2 with 131 upvotes—proof that HN readers still crave foundational knowledge, not just news.

OpenScreen offers a free, open-source alternative to the polished Screen Studio app, capturing 239 upvotes from users tired of proprietary screen recording tools.

Germany’s eIDAS implementation will soon force citizens to use Apple or Google accounts for digital identity, sparking 114 comments on privacy and tech dependency.

A universal monitoring tool called zml-smi works across GPUs, TPUs, and NPUs, gathering 30 upvotes from the hardware optimization crowd.

The 'LLM Wiki' demonstrates an 'idea file' approach to organizing knowledge for large language models, earning 159 upvotes for its structured, shareable methodology.

Rubysyn aims to formally clarify Ruby’s syntax and semantics, landing 31 upvotes with zero comments—suggesting interest but little debate.

Lisette is a small language inspired by Rust that compiles to Go, earning just 5 upvotes—a niche experiment that failed to ignite broad curiosity.

A satirical investigation counting Microsoft’s 'Copilot' products racked up 584 upvotes and 289 comments, reflecting deep frustration with brand overuse.

A small app built for the FSI German language course managed 22 upvotes, showing even modest learning tools can find an audience here.

An archived 2009 PDF textbook on computer music theory, reaching #2 with 131 upvotes—proof that HN readers still crave foundational knowledge, not just news.

OpenScreen offers a free, open-source alternative to the polished Screen Studio app, capturing 239 upvotes from users tired of proprietary screen recording tools.

Germany’s eIDAS implementation will soon force citizens to use Apple or Google accounts for digital identity, sparking 114 comments on privacy and tech dependency.

A universal monitoring tool called zml-smi works across GPUs, TPUs, and NPUs, gathering 30 upvotes from the hardware optimization crowd.

The 'LLM Wiki' demonstrates an 'idea file' approach to organizing knowledge for large language models, earning 159 upvotes for its structured, shareable methodology.

Rubysyn aims to formally clarify Ruby’s syntax and semantics, landing 31 upvotes with zero comments—suggesting interest but little debate.

Lisette is a small language inspired by Rust that compiles to Go, earning just 5 upvotes—a niche experiment that failed to ignite broad curiosity.

A satirical investigation counting Microsoft’s 'Copilot' products racked up 584 upvotes and 289 comments, reflecting deep frustration with brand overuse.

A small app built for the FSI German language course managed 22 upvotes, showing even modest learning tools can find an audience here.