User actions and system behavior
These diagrams connect UI actions to internal processing. Before reading the implementation, use them to see where users wait and what lets them continue.
Make a video ready for questions
After upload, users still wait for transcription and search preparation. Distinguish upload failures from processing failures in the UI.
Answer a question
Some questions can be answered using metadata alone. Questions about lesson content refer to subtitles. See prompt design for tools and limits.
How study mode differs
In addition to answering open questions, study mode uses PLOG concepts, prerequisites, questions, and hints. Video processing completion and learning-graph readiness are separate states.
Related: Video states, PLOG and study mode, Flow by responsibility.