Build an LLM Tokenizer and Attention from Scratch in TypeScript

SitePoint tutorial that implements BPE tokenization, cosine similarity vector search, and scaled dot-product attention in TypeScript—exposing LLM primitives as ordinary readable code.

Tutorial · LLMs · Tutorials · Programming · Machine Learning

Automating eval design and hillclimbing with Claude

Lance Martin (claude.dev) explains principles for production-like evals with held-out sets, then shows how the claude-api skill’s build-eval and hillclimb commands automate design and overfitting-aware improvement—including cost and performance case studies.

Tutorial · AI · LLMs · Tutorials · Benchmarks

A minimal kernel in Swift, running in QEMU

Antonin walks through writing a tiny kernel in Embedded Swift that boots in QEMU: the Swift package and compiler setup, bridging Swift to assembly with the @c attribute, providing the missing runtime functions, describing the memory layout with a linker script, printing to the serial console, and finally echoing typed characters back as a simple prompt.

Tutorial · Systems Programming · Programming · Tutorials

Replacing the old battery on rechargeable bike lights

Julia Evans walks through repairing decade-old rechargeable bike lights by replacing the battery at a makerspace—opening the case, identifying the cell, soldering a replacement, and what she learned as a non-electronics expert.

Tutorial · Hardware · Tutorials · Engineering · Education

Postgres AT TIME ZONE 'UTC' does NOT do what you think it does

A practical Postgres footgun: AT TIME ZONE 'UTC' converts timestamptz to timestamp without time zone—so month math and equality break unless you apply AT TIME ZONE twice.

Tutorial · Databases · Programming · Tutorials · Engineering

Modern Object Pascal Introduction for Programmers

A practical introduction to Modern Object Pascal for programmers coming from other languages: units, classes, generics, memory management, exceptions, and more—maintained by Michalis Kamburelis and the Castle Game Engine project.

Tutorial · Programming · Tutorials · Education

Digital Audio on the ZX Spectrum's 1-Bit Beeper

Michael Martin wraps a ZX Spectrum series with a practical write-up on coaxing high-quality digital audio from the machine's 1-bit beeper—covering techniques, trade-offs, and surprisingly good results on every Spectrum model.

Tutorial · Hardware · Programming · Tutorials · Systems Programming

Dissecting House of Apple 2 on modern glibc

An interactive GDB walkthrough of House of Apple 2 on glibc 2.43: FSOP past vtable checks, wide-stream arbitrary call, stack pivot, and ROP—with a follow-along lab.

Tutorial · Security · Linux · Systems Programming · Tutorials

The Greatest Pun: JavaScript's ${{ }} tagged template literal

Nishant Shukla unpacks JavaScript tagged template literals—how ${} interpolation and the tag function combine into a surprisingly powerful (and punny) language feature, with clear examples.

Tutorial · Programming · Web Development · Tutorials

Optimizing x264 Settings and Per-title Ladders

Jan Ozer shows how to tune x264 encodes and per-title bitrate ladders to cut bandwidth while improving quality—practical encoder settings and ladder design for H.264-heavy streaming workflows.

Tutorial · Performance · Tutorials · Programming

Local AI on a 12 GB GPU: what survived testing, and how to set it up

Hands-on notes testing local AI models on a 12 GB RTX 3060: which stacks fit in VRAM, how context length decides spills to CPU, and a practical setup that survived the author’s trials.

Tutorial · AI · LLMs · Hardware · Tutorials

NetBSD: Playing with disklabels

A hands-on walkthrough of NetBSD disklabels for someone coming from Linux/DOS: how labels are structured, how to inspect and edit them safely, and the gotchas when partitioning disks the BSD way.

Tutorial · Linux · Systems Programming · Open Source · Tutorials

Differences between foldl and foldr

The Haskell blog preserves Alexis King's widely used explanation that foldl and foldr differ in associativity rather than traversal direction, covering lazy versus strict folds, why foldl' is usually right for strict accumulation, when foldr suits lazy or short-circuiting work, and when foldMap is the better choice.

Tutorial · Programming · Tutorials · Performance

Writing a ray tracer in Brainfuck

A playful systems post that implements a ray tracer in Brainfuck—compilers, esolangs, and the surprising claim that sometimes the correct answer is to write a compiler.

Tutorial · Programming · Compilers · Graphics · Open Source

Packing Binary Is Fun, Actually

Pranav Desai’s hands-on tour of binary packing: why packing bits can be fun, the techniques that matter, and practical patterns for packing denser structures without losing your mind.

Blog post · Programming · Systems Programming · Performance · Engineering

SDF vs. MSDF vs. Slug: GPU Text Rendering

Chris Hanson compares SDF, MSDF, Slug, texture atlases, and Rive for GPU text: how signed-distance fields trade sharpness, memory, and shader cost when you draw outlines yourself.

Tutorial · Graphics · Programming · Hardware · Tutorials

Getting the most out of Opus 5.5 in Claude and Claude Code

Addy Osmani shares practical prompting, long-run steering, and verification tips for Anthropic’s Opus 5.5 model in Claude apps and Claude Code.

Tutorial · ai · llms · tutorials · developer-tools

Jev in 25 lines of Python

NobodyWho shows a local, 25-line Python sketch of Jev-style decision models: load a small GGUF, score labeled choices from logits, and print calibrated-looking probabilities without sending data to an API.

Tutorial · AI · LLMs · Programming · Open Source

Sending SMS with an Agentic AI using Twilio and Hermes Agent

Twilio posts cloud communications trends, customer stories, and tips for building scalable voice and SMS applications with Twilio's APIs.

Tutorial · AI Agents · Twilio · SMS · Tutorials

Duality in Optimization: A Visual Tutorial

Mohini Bariya’s arXiv tutorial builds geometric intuition for Lagrangian duality in optimization—bridging solver techniques and solution interpretation with visual explanations of the dual.

Research · Research · Mathematics · Machine Learning · Tutorials