Core admin functionality files from wp-admin/includes/.

Source: wp-admin/includes/

Categories

AJAX & Actions

• ajax-actions.php.md – Admin AJAX handlers

Dashboard

• dashboard.php.md – Dashboard widgets and display
• credits.php.md – Credits page functions

Content Management

• comment.php.md – Comment management
• bookmark.php.md – Bookmark/links management
• export.php.md – Export functions
• import.php.md – Import functions

File System

• file.php.md – File operations
• image.php.md – Image functions
• image-edit.php.md – Image editing

Upgraders

• class-wp-upgrader.php.md – Base upgrader
• class-core-upgrader.php.md – Core upgrader
• class-plugin-upgrader.php.md – Plugin upgrader
• class-theme-upgrader.php.md – Theme upgrader

List Tables

• class-wp-list-table.php.md – Base list table
• class-wp-posts-list-table.php.md – Posts table
• class-wp-users-list-table.php.md – Users table
• class-wp-comments-list-table.php.md – Comments table
• class-wp-media-list-table.php.md – Media table
• class-wp-plugins-list-table.php.md – Plugins table
• class-wp-themes-list-table.php.md – Themes table
• class-wp-terms-list-table.php.md – Terms table

Filesystem Abstraction

• class-wp-filesystem-base.php.md – Filesystem base
• class-wp-filesystem-direct.php.md – Direct filesystem
• class-wp-filesystem-ftpext.php.md – FTP filesystem
• class-wp-filesystem-ssh2.php.md – SSH2 filesystem

Site Health

• class-wp-site-health.php.md – Site Health checks
• class-wp-debug-data.php.md – Debug data collection