System Card: Claude Opus 4 & Claude Sonnet 4

Direct link to a PDF on Anthropic’s CDN because they don’t appear to have a landing page anywhere for this document. Anthropic’s system cards are alwa...

Serving 200 million requests per day with a cgi-bin

Jake Gold tests how well 90s-era CGI works today, using a Go + SQLite CGI program running on a 16-thread AMD 3700X. Using CGI on modest hardware, it’s...

Anthropic: How we built our multi-agent research system

OK, I’m sold on multi-agent LLM systems now. I’ve been pretty skeptical of these until recently: why make your life more complicated by running multip...

AI and engineering tools - simonwillison.net

The tools on tools.simonwillison.net were mostly built using AI-assisted programming. This page lists 106 tools and their development history.

How to Secure Environment Variables for LLMs, MCPs, and AI Tools Using 1Password or Doppler

Stop hardcoding API keys in MCP configs and AI tool settings. Learn how to use 1Password CLI or Doppler to inject secrets just-in-time for Claude, Cur...

Claude Code: Automatic Linting, Error Analysis, & Custom Commands

How to leverage Claude Code's error analysis slash-commands and create your own linting commands to automate repetitive CLI tasks.

Claude Code Output Styles: Explanatory, Learning, and Custom Options

An implementation guide to Claude Code's /output-style, the built‑in Explanatory and Learning modes (with to-do prompts), and creating reusable custom...

How to Have LLMs Write More Efficient Code using Optimal Data Structures

LLMs often generate O(n²) solutions when O(n) would suffice. Learn how to prompt for optimal data structures, avoid common performance pitfalls, and g...

FlutterFlow

No-code platform for building native mobile applications using Flutter, enabling rapid app development without coding.

Heroes Jobs

The app for Gen Z searching for a job

repo-tokens-calculator

CLI token counter (Python + tiktoken + uv) with pretty summary

williamcallahan.com

Interactive personal site with beautiful terminal/code components & other dynamic content