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The Unofficial 37signals/DHH Rails Style Guide

About This Document

This style guide was generated by Claude Code through deep analysis of the Fizzy codebase - 37signals' open-source project management tool.

Why Fizzy matters: While 37signals has long advocated for "vanilla Rails" and opinionated software design, their production codebases (Basecamp, HEY, etc.) have historically been closed source. Fizzy changes that. For the first time, developers can study a real 37signals/DHH-style Rails application - not just blog posts and conference talks, but actual production code with all its patterns, trade-offs, and deliberate omissions.

How this was created: Claude Code analyzed the entire codebase - routes, controllers, models, concerns, views, JavaScript, CSS, tests, and configuration. The goal was to extract not just what patterns are used, but why - inferring philosophy from implementation choices.

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require "active_record"

namespace :db do

  db_config       = YAML::load(File.open('config/database.yml'))
  db_config_admin = db_config.merge({'database' => 'postgres', 'schema_search_path' => 'public'})

  desc "Create the database"
  task :create do
    ActiveRecord::Base.establish_connection(db_config_admin)

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--------------------------
-- CORE LIBRARY IMPORTS --
--------------------------
import Task         exposing (Task, ThreadID, andThen, sequence, succeed, spawn)
import Json.Decode  exposing (Decoder, list, int, string, (:=), map, object2)
import Signal       exposing (Signal, Mailbox, mailbox, send)
import List

---------------------------------
-- THIRD PARTY LIBRARY IMPORTS --

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--------------------------
-- CORE LIBRARY IMPORTS --
--------------------------
 
import Json.Decode as Decode  exposing (Decoder, object2, map, string, list, (:=))
import Task                   exposing (Task, andThen, succeed, fail, onError)
import Signal                 exposing (Signal, Mailbox, mailbox, message, send)
import String
 
-------------------------

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--------------------------
-- CORE LIBRARY IMPORTS --
--------------------------
import Task         exposing (Task, succeed, andThen, onError)
import Json.Decode  exposing (Decoder, object2, (:=), string, int, list, map)
import Signal       exposing (Signal, Mailbox, mailbox, send)
import List

---------------------------------
-- THIRD PARTY LIBRARY IMPORTS --

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package main

import (
	"fmt"
	"github.com/codegangsta/negroni"
	"github.com/julienschmidt/httprouter"
	"net/http"
)

func main() {

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# coding: utf-8
require 'sinatra'
set server: 'thin', connections: []

get '/' do
  halt erb(:login) unless params[:user]
  erb :chat, locals: { user: params[:user].gsub(/\W/, '') }
end

get '/stream', provides: 'text/event-stream' do

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// https://blogs.oracle.com/janp/entry/how_the_scp_protocol_works
package main

import (
	"code.google.com/p/go.crypto/ssh"
	"crypto"
	"crypto/rsa"
	"crypto/x509"
	"encoding/pem"
	"fmt"

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include $(GOROOT)/src/Make.inc

GOFMT=gofmt -spaces=true -tabindent=false -tabwidth=4

all:
	$(GC) jsontest.go 
	$(LD) -o jsontest.out  jsontest.$O

format:
	$(GOFMT) -w jsontest.go

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require 'faye'

Faye::WebSocket.load_adapter('thin')
use Faye::RackAdapter, :mount => '/faye', :timeout => 25

require ::File.expand_path('../config/environment',  __FILE__)
run App::Application