Where LifterLMS can be changed safely
Override templates, do not edit them
LifterLMS loads its front-end screens from template files and checks your theme first. A copy placed in a lifterlms folder inside the child theme is used in place of the original, and the plugin file is left alone. We copy as few files as possible. Many changes need no copy at all, because the templates are assembled from small parts attached to action hooks: the course syllabus, the progress bar, the instructor box and the pricing table are each hooked in at a set priority. Removing one, moving it or inserting something between two of them takes a few lines in a site plugin and leaves nothing to maintain when LifterLMS revises its markup.
Dashboard tabs and endpoints
The student dashboard builds its navigation from a filterable list of tabs. Each tab has a title, an endpoint in the URL and a function that outputs its content. So adding a Resources tab or dropping Achievements is a supported change. The usual mistake is forgetting that a new endpoint is a new rewrite rule, which is why a custom tab can show a 404 until permalinks are refreshed. We register the endpoint in the plugin and flush rules on activation so that error never reaches a student.
Rules around plans, orders and enrollment
LifterLMS fires an action whenever a student is enrolled or removed, when an access plan is purchased and when an order changes status. Custom rules attach there. Enrolling someone in a follow-up course, extending access for buyers of a certain plan or holding enrollment until an admin approves are all a matter of listening for the right event and calling the enrollment functions LifterLMS itself uses. We avoid writing to its tables directly. Going through the student and order objects means the plugin's own notifications, engagements and reports stay in step with what our code did.
Fields, engagements and certificates
Checkout, registration and account forms are editable in the block editor, and extra fields can be saved to user meta. The work is in what happens next: validating a tax ID on the server, showing the field on the order screen, adding it to exports and exposing it as a merge code so an engagement email or a certificate can print it. Custom engagement triggers follow the same idea. If your program has an event LifterLMS does not know about, such as a coaching call attended, we fire it and let the standard engagement system send the email or award the certificate.
Reports and what tends to break
Reporting changes range from an extra column in the students table to a new screen. For anything heavy we query in batches and cache the result, since order and enrollment data grows quickly. Regressions on customized LifterLMS sites mostly come from an overridden template that has fallen behind the original, a hook that changed its arguments or CSS aimed at class names that were renamed. We keep a list of every override and re-check it on staging at each LifterLMS update, the same routine we follow for our own add-on. It can also be folded into a WordPress maintenance plan.
