Charles Wei JavaCS3

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.

2019 Personal Highlights

Jan.

去美国北卡出差，第一次和美国人打德州扑克，去了Duke大学

Jun.

参加大学同学婚礼，当了第二次伴郎

Jul.

放弃公租房

正则表达式学习

正则表达式是一个可以帮助我们匹配复杂字符串模式的工具

匹配字符(What)

.
[abcd] [a-zA-Z] [^abcd]
\d \s \t \w ...

匹配数量(How)

How to setup ssh proxy

Add the following in your ~/.ssh/config

Host <dest domain/ip>
  ProxyCommand ssh -q -W %h:%p <proxy user>@<proxy domain/ip>

Example

Interview Quizz: Cashier

A cashier in a shop need a program that will print out a receipt for a given order. And you're going to implement that.

Q1: Simple Printing

We're going to use some objects interaction to represent a payment process, and then print a receipt.

# python version

	#include <stdio.h>
	#include <stdlib.h>

	#define CHAR2INT(x) (('0' <= x && x <= '9') ? \
	(x - '0') : \
	(('a' <= x && x <= 'f') ? \
	(10 + (x - 'a')) : \
	(('A' <= x && x <= 'F') ? (10 + (x - 'A')) : (0))))

	#define UUID2ARRAY(uuid) { \

	const assert = require('assert')

	const ENCODERS = {
	raw(len) {
	return function(v) {
	assert(v instanceof Buffer)
	const buffer = Buffer.alloc(len)
	v.copy(buffer)

	return buffer

	for fgbg in 38 48 ; do #Foreground/Background
	for color in {0..256} ; do #Colors
	#Display the color
	echo -en "\e[${fgbg};5;${color}m ${color}\t\e[0m"
	#Display 10 colors per lines
	if [ $((($color + 1) % 10)) == 0 ] ; then
	echo #New line
	fi
	done
	echo #New line

	# Style Guide: https://github.com/google/styleguide/blob/gh-pages/pyguide.md
	# Pythonic: https://docs.python-guide.org/writing/style/

	from __future__ import absolute_import
	from __future__ import division
	from __future__ import print_function

	import os
	import sys
	import string

	#!/usr/bin/env python
	# Style Guide: https://github.com/google/styleguide/blob/gh-pages/pyguide.md
	# Pythonic: https://docs.python-guide.org/writing/style/

	from __future__ import absolute_import
	from __future__ import division
	from __future__ import print_function

	import os
	import re