TpLib Organization

Overview
The TilePlus Toolkit base runtime system, generically called "TpLib," is divided into two groups of code. This is a block diagram of the core software. Dashed lines are inheritance, solid lines are dependencies.
Static classes
These are static because they are required for editing support, or have low impact on domain reloading, or are required immediately in a built-app or when switching to Play mode in the Editor.
TpLib: The enabling and underlying library. Implements a Tilemap DataBase (TMDB) and queries, and provides update 'ticks' for various system functions.
TpZoneManagerLib: Editing support and Tile+Painter.
TpServiceManager: small and required immediately in Play mode.
TileFabLib: API for loading Tilefabs and managing ZoneManagers (Layout system). Needed for both Edit and Play/Build use.
TpTileUtils: small utility library, improper as service.
TpEvents: small, required immediately in Play mode.
Generally, these have to be present after a domain reload and are required for edit support for the Tile+Brush, TilePlusPainter, etc. Where possible, their domain reload time is minimized by:
Lazy initialization of arrays and lists
Simple 'InitializeOnLoad' methods.
Small memory allocations
Overrideable with a project-level scriptable object for runtime initialization.
Scriptable Runtime Services
In this documentation these are often referred to as SRS. SRS are dynamically-loadable Scriptable Objects designed for independent services like those shown below or for any you create.
There's a simple base-class for these that you can use to create your own and add them to the system-level Service Manager.
These are runtime-only. They aren't needed for edit support and would impact domain reload time for various reasons, or perhaps you don't actually want to use all of these extra features.
TpTweener: a tweener for tile sprites and GameObjects.
TpSpawner: pooled spawner
TpMessaging: Monobehaviour-to-tile or tile-to-tile messaging.
TpTilePositionDb: keeps track of occupied positions on specified Tilemaps.
Please see the Services section for more info.