On the Project-level

Here I'll use the example of the IRC bot I write: Goomba

+ Goomba (Goomba namespace)
   |+ Configuration (Goomba.Configuration namespace)
   |   |- Config.boo
   |       |# class Config
   |+ Data (Goomba.Data namespace)
   |   |- Column.boo
   |   |   |# class Column
   |   |- Database.boo
   |   |   |# enum DatabaseType
   |   |   |# class Database
   |   |- DatabasePreferences.boo
   |   |   |# class DatabasePreferences
   |   |- Result.boo
   |       |# class Result
   |+ Plugins (Goomba.Plugins namespace)
   |   |- DefineCommand.boo
   |   |   |# class DefineCommand
   |   |       |# class Definition
   |   |- Hail.boo
   |   |   |# class Hail
   |   |       |# class HailMessage
   |   |- HelpCommand.boo
   |   |   |# class HelpCommand
   |   |- Logger.boo
   |   |   |# class Logger
   |   |       |# class Message
   |   |       |# class Action
   |   |- Quoter.boo
   |   |   |# class Quoter
   |   |       |# class Quote
   |   |- RawLogger.boo
   |   |   |# class RawLogger
   |   |- UrlGenerator.boo
   |   |   |# class UrlGenerator
   |   |       |# class Engine
   |   |- UserTracker.boo
   |   |   |# class UserTracker
   |   |       |# class User
   |   |- VersionCommand.boo
   |   |   |# class VersionCommand
   |   |- UrlTracker.boo
   |       |# class UrlTracker
   |           |# class Url
   |- ActionEventArgs.boo
   |   |# enum ActionType
   |   |# class ActionEventArgs
   |- DebugLogger.boo
   |   |# enum LogImportance
   |   |# class DebugLogger
   |- Goomba.boo
   |   |# class Goomba
   |   |! Main Body (This will be executed when Goomba.exe is run)
   |- GoombaPreferences.boo
   |   |# class GoombaPreferences
   |- IPlugin.boo
   |   |# interface IPlugin
   |- MessageEventArgs.boo
   |   |# enum MessageType
   |   |# class MessageEventArgs
   |- Sender.boo
       |# enum SenderType
       |# class Sender

Which I have set up to create the assemblies Goomba.exe, Goomba.Data.dll, Goomba.Configuration.dll, as well as one assembly per plugin.

You may have noticed a few important things:

• For every directory, it represents a different namespace, with the same name as the directory itself.
• Each .boo file has at most one class in it. That class will have the same exact name as the .boo file.
• The "Main Body" section is below the class Goomba definition. Any inline executable code must be at the bottom of a file in the assembly.
• Enums come before classes. This is merely a coding practice that is not required, but recommended. If an enum is larger than 15 values, place it in its own file.

On the File-level

Files must be defined in this order:

1. Module docstring
2. Namespace declaration
3. Import statements
4. Enums/Classes/Structs/Interfaces
5. Functions
6. Main code executed when script is run
7. Assembly attributes