Reverse Engineer a WordPress Plugin (Phase 1)

I have a WordPress plugin that I need reverse engineering.

The plugin contains multiple custom classes and custom post types, each post type having multiple custom meta fields.

For each post type I need to extract the data model; e.g. post type, fields, field types etc in preparation for recreating the data model in Laravel/MySQL. It looks like there are 14 custom post types in total.

For each class I need to extract the functions and the required/optional parameters for each function (approximately 29 classes total).

Background

The WordPress plugin is a control panel that interfaces with external servers using bash scripts/REST.

I am planning on rewriting this plugin in Laravel while maintaining the existing data structure as much as possible and re-using the existing bash scripts.

Special consideration will be given for developers that have experience in the following:
WP Plugins (essential)
Laravel (nice to have)
Bash scripts (nice to have).

Generic 'Copy & Paste' and paste responses will be rejected instantly.