geoffreylitt

name	explain-diff-html
description	Use when the user asks for a rich explanation of a code change, diff, branch, or PR. Produces HTML output.

Explain Diff

Please make me a rich, interactive explanation of the specified code change.

It should have these sections:

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.

dabit3

PI is a TypeScript toolkit for building AI agents. It's a monorepo of packages that layer on top of each other: pi-ai handles LLM communication across providers, pi-agent-core adds the agent loop with tool calling, pi-coding-agent gives you a full coding agent with built-in tools, session persistence, and extensibility, and pi-tui provides a terminal UI for building CLI interfaces.

These are the same packages that power OpenClaw. This guide walks through each layer, progressively building up to a fully featured coding assistant with a terminal UI, session persistence, and custom tools.

By understanding how to compose these layers, you can build production-grade agentic software on your own terms, without being locked into a specific abstraction.

Pi was created by @badlogicgames. This is a great writeup from him that explains some of the design decisions made when creating it.

The stack

andrewmd5

package main

import (
	"fmt"
	"os"

	"github.com/bytecodealliance/wasmtime-go/v31"
)

// Default memory configuration (matching JavaScript defaults)

cpursley

PostgreSQL is Enough

See the new site: https://postgresisenough.dev

---

• Simplify: move code into database functions
• Just Use Postgres for Everything
• Just use Postgres
• PostgreSQL is the worlds’ best database

peterw

import openai
import streamlit as st
from streamlit_chat import message
from dotenv import load_dotenv
import os 
from langchain.embeddings.openai import OpenAIEmbeddings
from langchain.vectorstores import Chroma
import openai
from langchain.document_loaders import UnstructuredMarkdownLoader
from langchain.chains.question_answering import load_qa_chain

peterw

import openai
import streamlit as st
from streamlit_chat import message
from dotenv import load_dotenv
import os 
from langchain.embeddings.openai import OpenAIEmbeddings
from langchain.vectorstores import Chroma
import openai
from langchain.document_loaders import UnstructuredMarkdownLoader
from langchain.chains.question_answering import load_qa_chain

rawnly

import { useCalendar } from '@h6s/calendar';
import { useMachine } from '@xstate/react';
import { Button as AriaButton } from 'ariakit/button';
import clsx from 'clsx';
import { isSunday, isSameDay, addMonths, isFuture, isPast, setDate } from 'date-fns';
import format from 'date-fns/format';
import isWithinInterval from 'date-fns/isWithinInterval';
import { FC, useCallback, useMemo } from 'react';

import Select from '@components/forms/components/Select';

samselikoff

import * as d3 from "d3";
import {
  eachMonthOfInterval,
  endOfMonth,
  format,
  isSameMonth,
  parseISO,
  startOfMonth,
} from "date-fns";
import useMeasure from "react-use-measure";

samselikoff

import { isTest } from "@/lib/constants";
import { Dialog } from "@headlessui/react";
import { motion } from "framer-motion";

const TRANSITIONS = {
  DURATION: !isTest ? 0.5 : 0,
  EASE: [0.32, 0.72, 0, 1],
};

function Modal({ onClose = () => {}, initialFocusRef, children }) {