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Jeremy Smith jeremysmithco

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@karpathy
karpathy / llm-wiki.md
Created April 4, 2026 16:25
llm-wiki

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.

@karpathy
karpathy / microgpt.py
Last active April 21, 2026 01:06
microgpt
"""
The most atomic way to train and run inference for a GPT in pure, dependency-free Python.
This file is the complete algorithm.
Everything else is just efficiency.
@karpathy
"""
import os # os.path.exists
import math # math.log, math.exp
@peterc
peterc / CONVENTIONS.md
Last active March 8, 2026 00:42
CONVENTIONS.md file for AI Rails 8 development
  • You MUST NOT try and generate a Rails app from scratch on your own by generating each file. For a NEW app you MUST use rails new first to generate all of the boilerplate files necessary.
  • Create an app in the current directory with rails new .
  • Use Tailwind CSS for styling. Use --css tailwind as an option on the rails new call to do this automatically.
  • Use Ruby 3.2+ and Rails 8.0+ practices.
  • Use the default Minitest approach for testing, do not use RSpec.
  • Default to using SQLite in development. rails new will do this automatically but take care if you write any custom SQL that it is SQLite compatible.
  • An app can be built with a devcontainer such as rails new myapp --devcontainer but only do this if requested directly.
  • Rails apps have a lot of directories to consider, such as app, config, db, etc.
  • Adhere to MVC conventions: singular model names (e.g., Product) map to plural tables (products); controllers are plural.
  • Guard against incapable browsers accessing controllers with `allo
@searls
searls / tailwind_class_builder.rb
Created July 3, 2024 17:19
Here's a custom Tailwind FormBuilder for Rails. To set this up, just set ` ActionView::Base.default_form_builder = FormBuilders::TailwindFormBuilder` somewhere (and customize all the CSS classes)
class TailwindClassBuilder
include ActionView::Helpers::TagHelper
def button_classes(options)
button_type = options.delete(:button_type) { :button }
class_names(
# general classes
"mt-4 px-1 sm:px-3 py-sm sm:py-1 font-semibold bg-transparent border rounded",
case button_type
@fxn
fxn / ruby-the-future-of-frozen-string-literals.md
Last active February 15, 2026 22:08

Ruby: The future of frozen string literals

What is a literal?

In programming languages, literals are textual representations of values in the source code. This is a syntactical concept.

Some examples:

7 # integer literal
@mpvosseller
mpvosseller / create_heroku_app.rb
Last active January 2, 2023 19:34
Ruby function to create a new Heroku app with the Heroku Platform API
# Function to create a new Heroku app instance using the ruby Heroku Platform API
#
# Documentation:
# https://devcenter.heroku.com/articles/setting-up-apps-using-the-heroku-platform-api
# https://devcenter.heroku.com/articles/platform-api-reference#app-setup
# https://github.com/heroku/platform-api
# https://heroku.github.io/platform-api
#
# Add the gem 'platform-api'
require "platform-api"