karpathy

LLM Wiki

A pattern for building personal knowledge bases using LLMs.

This is an idea file, it is designed to be copy pasted to your own LLM Agent (e.g. OpenAI Codex, Claude Code, OpenCode / Pi, or etc.). Its goal is to communicate the high level idea, but your agent will build out the specifics in collaboration with you.

The core idea

Most people's experience with LLMs and documents looks like RAG: you upload a collection of files, the LLM retrieves relevant chunks at query time, and generates an answer. This works, but the LLM is rediscovering knowledge from scratch on every question. There's no accumulation. Ask a subtle question that requires synthesizing five documents, and the LLM has to find and piece together the relevant fragments every time. Nothing is built up. NotebookLM, ChatGPT file uploads, and most RAG systems work this way.

hensg

Ghostty Keyboard Shortcuts

Default keyboard shortcuts for Ghostty terminal emulator. Platform-specific differences are noted where applicable.

Window Management

Action	Windows/Linux	macOS
New window	Ctrl+Shift+N	Cmd+N
Close window	Alt+F4	Cmd+Shift+W

dolzenko

exceptions = []
tree = {}
ObjectSpace.each_object(Class) do |cls|
  next unless cls.ancestors.include? Exception
  next if exceptions.include? cls
  next if cls.superclass == SystemCallError # avoid dumping Errno's
  exceptions << cls
  cls.ancestors.delete_if {|e| [Object, Kernel].include? e }.reverse.inject(tree) {|memo,cls| memo[cls] ||= {}}
end

iamwildtuna

Meta (Instagram, Facebook)
// Узлы
157.240.253.174, 157.240.253.172, 157.240.253.167, 157.240.253.63, 157.240.253.32
157.240.252.174, 157.240.252.172, 157.240.252.167, 157.240.252.63, 157.240.252.38
57.144.112.34, 57.144.110.1, 157.240.205.174, 87.245.223.97

// Подсети
213.102.128.0/24
204.15.20.0/22
199.201.0.0/16

yahonda

Ruby 3.1 on Rails

Actions required to use Ruby 3.1.0 with Rails

Rails 7.0.Z

• Rails 7.0.1 is compatible with Ruby 3.1.0.
• Rails 7.0.1 addes net-smtp, net-imap and net-pop gems as Action Mailbox and Action Mailer dependency, you do not need to add them explicitly in your application Gemfile anymore.
• thor 1.2.1 has been released. You will not see DidYouMean::SPELL_CHECKERS.merge deprecate warnings anymore.

Rails 6.1.Z

• Use Rails 6.1.5 to support database.yml with aliases and secrets.yml with aliases.

extratone

Action	Command
Move to next chat	Ctrl + Tab
Move to next chat	Ctrl + PageDown
Move to next chat	Alt + Arrow Down
Move to previous chat	Ctrl + Shift + Tab
Move to previous chat	Ctrl + PageUp
Move to previous chat	Alt + Arrow Up
Go to Previous Folder	Ctrl + Shift + Arrow Up
Go to Next Folder	Ctrl + Shift + Arrow Down

etozzato

if Rails.env.development?
  FileUtils.mkdir_p(Rails.root.join('config', 'certs'))
  key_path = Rails.root.join('config', 'certs', 'development.key')
  crt_path = Rails.root.join('config', 'certs', 'development.crt')
  unless File.exist?(key_path) && File.exist?(crt_path)

    def cert_domain
      'localhost' # Setting[:cookie_domain] || 'localhost'
    end

vncsna

set -e, -u, -o, -x pipefail

The set lines

• These lines deliberately cause your script to fail. Wait, what? Believe me, this is a good thing.
• With these settings, certain common errors will cause the script to immediately fail, explicitly and loudly. Otherwise, you can get hidden bugs that are discovered only when they blow up in production.

• set -euxo pipefail is short for:

set -e
set -u

jamesmcm

# Running specific applications through a VPN with network namespaces

# Initial state
curl ifconfig.co/city
sudo ip link list
sudo ip netns list

# Disable Uncomplicated Firewall (Ubuntu)
sudo ufw disable

jimmychu0807

use std::str;

fn main() {
  // -- FROM: vec of chars --
  let src1: Vec<char> = vec!['j','{','"','i','m','m','y','"','}'];
  // to String
  let string1: String = src1.iter().collect::<String>();
  // to str
  let str1: &str = &src1.iter().collect::<String>();
  // to vec of byte