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peterc / CONVENTIONS.md
Last active January 17, 2026 13:46
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
require "strscan"
class Scanner
TOK = []
TOK["{".ord] = :LBRACE; TOK["}".ord] = :RBRACE; TOK[";".ord] = :SEMI
def initialize data
@scan = StringScanner.new data
@prev_pos = @scan.pos
end
from flask import Flask
from flask.ext.classy import FlaskView
# we'll make a list to hold some quotes for our app
quotes = [
"A noble spirit embiggens the smallest man! ~ Jebediah Springfield",
"If there is a way to do it better... find it. ~ Thomas Edison",
"No one knows what he can do till he tries. ~ Publilius Syrus"
]
@dstroot
dstroot / install_postgresql.sh
Created June 13, 2012 00:26
Install PostgreSQL on Amazon AMI
#!/bin/bash
###############################################
# To use:
# https://raw.github.com/gist/2776351/???
# chmod 777 install_postgresql.sh
# ./install_postgresql.sh
###############################################
echo "*****************************************"
echo " Installing PostgreSQL"
echo "*****************************************"