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Aaron aaronvenezia

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@peterc
peterc / CONVENTIONS.md
Last active April 23, 2025 06:55
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
@smellman
smellman / geojson_to_epsg3857.rb
Created August 8, 2023 10:54
GeoJSON (FeatureCollection) to EPSG:3857
#!/usr/bin/env ruby
# frozen_string_literal: true
require 'rgeo'
require 'rgeo/geo_json'
require 'rgeo/proj4'
require 'optparse'
OptionParser.new do |opts|
opts.banner = 'Usage: geojson_to_epsg3857.rb [options]'