PrairieLearn

Use when changing or reviewing PrairieLearn element question.html contracts, including schema-level attributes/children, Python semantic validation, docs, and AI HTML validation support lists.

Write end-to-end browser tests using Playwright.

Conventions for writing tRPC routers and procedures.

Backwards compatibility rules when changing element controllers in `apps/prairielearn/elements/`.

Dealing with groups and teams in PrairieLearn, and confusion about table/column/variable names.