users.php

• URL: /wp-admin/users.php
• Capability required: list_users (and related caps like edit_users, delete_users, promote_users, remove_users).
• What it does: Lists users, handles bulk actions (delete, remove, change role), and filtering/search.
• Key hooks: handle_bulk_actions-{$screen}, delete_user_form, users_have_additional_content.

user-new.php

• URL: /wp-admin/user-new.php
• Capability required: create_users (or promote_users in multisite).
• What it does: Adds new users or invites existing users to the site; supports multisite invite flow.
• Key hooks: user_new_form, user_new_form_tag, invite_user, invited_user_email, pre_user_login, autocomplete_users_for_site_admins.

user-edit.php

• URL: /wp-admin/user-edit.php?user_id={ID}
• Capability required: edit_user for target user (and edit_users to edit other users).
• What it does: User profile editor for any user; handles role changes and application passwords.
• Key hooks: show_user_profile, edit_user_profile, personal_options, profile_personal_options, show_password_fields, additional_capabilities_display, user_edit_form_tag, edit_user_profile_update, personal_options_update, admin_color_scheme_picker, wp_create_application_password_form, user_profile_picture_description.

profile.php

• URL: /wp-admin/profile.php
• Capability required: read (own profile).
• What it does: Redirects to or renders the current user’s profile editor (self-profile).
• Key hooks: (none in file; profile screen hooks come from user-edit.php).