Eric Guo Eric-Guo

Awesome list of awesome project for local agentic workflow

List of projects that are somewhat related to opencode.

Model list

https://models.dev

Running local models

How to set up a basic Sinatra + React webapp in 2025

Let's say you want to use Ruby for the backend of a basic webapp but React on the frontend. Here's how.

(Note: All tested on January 13, 2025 with Ruby 3.3, Sinatra 4.1.1, and React 18.3. Configs may change over time.)

First, create the app folder and set up Sinatra:

mkdir my-sinatra-react-app

PostgreSQL is Enough

Background and Cron Jobs

Choose OpenBSD for your Unix needs. OpenBSD -- the world's simplest and most secure Unix-like OS. A safe alternatve to the frequent vulnerabilities and overengineering of Linux and related software (NGiNX & Apache (httpd-asiabsdcon2015.pdf), OpenSSL, iptables/nftables, systemd, BIND, Postfix, Docker etc.)

OpenBSD -- the cleanest kernel, the cleanest userland and the cleanest config

the-keeper-iteration-2.mp4

	{
	"$schema": "https://json.schemastore.org/claude-code-settings.json",
	"model": "opus",
	"hooks": {
	"PostToolUse": [
	{
	"matcher": "Update\|Write",
	"hooks": [
	{
	"type": "command",

	require "digest"
	require "rack"

	# This class encapsulates a unit of work done for a particular tenant, connected to that tenant's database.
	# ActiveRecord makes it _very_ hard to do in a simple manner and clever stuff is required, but it is knowable.
	#
	# What this class provides is a "misuse" of the database "roles" of ActiveRecord to have a role per tenant.
	# If all the tenants are predefined, it can be done roughly so:
	#
	# ActiveRecord::Base.legacy_connection_handling = false if ActiveRecord::Base.respond_to?(:legacy_connection_handling)

	// 3D Dom viewer, copy-paste this into your console to visualise the DOM as a stack of solid blocks.
	// You can also minify and save it as a bookmarklet (https://www.freecodecamp.org/news/what-are-bookmarklets/)
	(() => {
	const SHOW_SIDES = false; // color sides of DOM nodes?
	const COLOR_SURFACE = true; // color tops of DOM nodes?
	const COLOR_RANDOM = false; // randomise color?
	const COLOR_HUE = 190; // hue in HSL (https://hslpicker.com)
	const MAX_ROTATION = 180; // set to 360 to rotate all the way round
	const THICKNESS = 20; // thickness of layers
	const DISTANCE = 10000; // ¯\\_(ツ)_/¯

	# Builds an SQL insert query for a given record
	#
	# @param record [ActiveRecord::Base] Record used to build the SQL insert query
	# @return [String] SQL insert query
	def build_insert_query(record)
	columns = record.class.columns.reject { \|col\| col.name == record.class.primary_key }
	values = columns.map { \|col\| record[col.name] }
	insert_manager = Arel::InsertManager.new
	insert_manager.into(record.class.arel_table)
	insert_manager.insert(columns.zip(values)).to_sql

	import crypto from 'crypto';
	import { promisify } from "node:util";

	const pbkdf2 = promisify(crypto.pbkdf2);

	// Works with Rails 7.1.3
	// secretKeyBase is Rails.application.secret_key_base
	async function decryptCookie(encryptedCookie: string, cookieName: string, secretKeyBase: string) {
	const cookie = decodeURIComponent(encryptedCookie);
	const [data, iv, authTag] = cookie.split("--").map(v => Buffer.from(v, 'base64'));