Tutorials

Building ambient agents with Amazon Bedrock AgentCore: From event-driven signals to human-in-the-loop workflows

Ambient agents respond to events such as an Amazon S3 upload, a schedule, or an alert instead of waiting for a chat prompt. This post walks through building framework-agnostic ambient agents on Amazon Bedrock AgentCore using Amazon SQS, AWS Lambda, and Amazon DynamoDB, with a single ask_human tool and a Jobs page for human-in-the-loop review.

Tutorial · AI Agents · Infrastructure · Tutorials · Developer Tools

Functional ultrasound imaging from scratch

Functional ultrasound imaging (fUSI) is a brain imaging modality that is just starting to be demonstrated in human studies. I’m sure many will be familiar with structural ultrasound imaging, which forms static images using ultrasound, as in a sonogram1. Functional ultrasound instead captures movies of brain tissue very rapidly, tracking subtle changes caused by the blood flow that follows neural activity.

Tutorial · Science · Machine Learning · Research · Tutorials

Building Production-Ready AI Agents with Spring AI, Guardrails, Evaluation, Observability, and Human-in-the-Loop

A Spring AI tutorial on hardening agents for production: guardrails, evaluation loops, observability, tool authorization, and human-in-the-loop approval beyond a basic MCP-connected demo.

Tutorial · AI Agents · Tutorials · Programming · Software Engineering

Reverse Engineering NovaLogic's Comanche Terrain Maps

A detailed reverse-engineering walkthrough of Comanche: Maximum Overkill MS-DOS terrain/map files—how NovaLogic packed heightmaps and related data, and how to reconstruct the landscapes.

Tutorial · Programming · Graphics · Tutorials · History

How to Build a Reliable AI Assistant with the Claude API

A freeCodeCamp tutorial building ShopHelper with the Claude API: conversation history, tools, multi-block responses, workflow patterns, and evaluating whether prompt changes actually help.

Tutorial · AI · Tutorials · LLMs · Programming

Using any C++ library in Godot

Using any C++ library in Godot Godot has become one of the most popular game engines of the last few years. It is free, open source under the MIT license, and small enough to download and start using in minutes.

Tutorial · Programming · C · Tutorials · Graphics

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

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

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