I built the to-do list, though I ran into a few problems along the way. The documentation wasn’t very clear, which slowed me down. I added a function to select a task and mark it as done or undone. The selection part works, but I can’t actually mark a task as done. This is because the page is static HTML: it can only read tasks.json, a file the Python script wrote earlier. Writing back to Google Tasks needs OAuth authentication, which lives in the Python script, and that doesn’t run in the browser. I’d also like to show the time a task is due, but the Google API doesn’t expose that information.