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Xiao Han xiaohan2012

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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.

@jackrusher
jackrusher / gcloud-tramp.el
Created June 19, 2019 13:58
Tramping into GCloud instances from within emacs
;; make sure you've set your default project with:
;; gcloud config set project <project-name>
(require 'tramp)
(add-to-list 'tramp-methods
'("gcssh"
(tramp-login-program "gcloud compute ssh")
(tramp-login-args (("%h")))
(tramp-async-args (("-q")))
(tramp-remote-shell "/bin/sh")
@erikzenker
erikzenker / metis.cc
Created March 10, 2015 14:49
Metis usage example
#include <cstddef> /* NULL */
#include <metis.h>
#include <iostream>
// Install metis from:
// http://glaros.dtc.umn.edu/gkhome/fetch/sw/metis/metis-5.1.0.tar.gz
// Build with
// g++ metis.cc -lmetis
@subfuzion
subfuzion / global-gitignore.md
Last active April 7, 2026 15:44
Global gitignore

There are certain files created by particular editors, IDEs, operating systems, etc., that do not belong in a repository. But adding system-specific files to the repo's .gitignore is considered a poor practice. This file should only exclude files and directories that are a part of the package that should not be versioned (such as the node_modules directory) as well as files that are generated (and regenerated) as artifacts of a build process.

All other files should be in your own global gitignore file:

  • Create a file called .gitignore in your home directory and add any filepath patterns you want to ignore.
  • Tell git where your global gitignore file is.

Note: The specific name and path you choose aren't important as long as you configure git to find it, as shown below. You could substitute .config/git/ignore for .gitignore in your home directory, if you prefer.

@tinybike
tinybike / weighted_median.py
Last active July 16, 2025 09:25
calculate a weighted median
#!/usr/bin/env python
# -*- coding: utf-8 -*-
"""
calculate a weighted median
@author Jack Peterson (jack@tinybike.net)
"""
from __future__ import division
import numpy as np
def weighted_median(data, weights):
@ctokheim
ctokheim / cython_tricks.md
Last active March 4, 2024 23:27
cython tricks

Cython

Cython has two major benefits:

  1. Making python code faster, particularly things that can't be done in scipy/numpy
  2. Wrapping/interfacing with C/C++ code

Cython gains most of it's benefit from statically typing arguments. However, statically typing is not required, in fact, regular python code is valid cython (but don't expect much of a speed up). By incrementally adding more type information, the code can speed up by several factors. This gist just provides a very basic usage of cython.

@mblondel
mblondel / letor_metrics.py
Last active September 19, 2024 06:13
Learning to rank metrics.
# (C) Mathieu Blondel, November 2013
# License: BSD 3 clause
import numpy as np
def ranking_precision_score(y_true, y_score, k=10):
"""Precision at rank k
Parameters
@jason-w
jason-w / gist:4969476
Created February 17, 2013 00:47
Helper functions that converts a MongoEngine Document to a Python Dict so it can be easily converted to JSON.
class Person (db.Document):
name = db.StringField(required=True)
created_date = db.ComplexDateTimeField(default=datetime.datetime.utcnow(), required=True)
def to_dict(self):
return helper.mongo_to_dict(self,[])
#helper.py
def mongo_to_dict(obj, exclude_fields):
@MohamedAlaa
MohamedAlaa / tmux-cheatsheet.markdown
Last active May 8, 2026 22:00
tmux shortcuts & cheatsheet

tmux shortcuts & cheatsheet

start new:

tmux

start new with session name:

tmux new -s myname