APIs and background work

Follow one save from HTTP input to durable data

A research team saves links in a shared reading list. The API accepts a URL, records it, and may attempt to obtain a display title. The URL can be safely saved even when that optional lookup fails. The later lessons introduce concurrent work, deadlines, tracing, and durable jobs around this interaction.

Start with the supplied local HTTP/SQLite API. Each project tells you which behavior is already implemented and which boundary you will add. AWS diagrams describe deployment responsibilities, while local commands remain the first runnable step.