INTERACTIVE ENGINEERING LAB
Full-Stack Application Engineering Studio
Fix a broken Save flow, follow the request into SQLite, and build a project you can run on your own computer.
Investigation steps
Source editor
Application preview
Request builder
SQLite console
Learning library
Release & portfolio
Run a clean database check, keep a project revision, or download the current source as a Node.js application.
Weekly practice
Learning evidence
Saved revisions
Activity
Execution trace
The preview simulates HTTP transport. API and database events come from the running handler and SQLite. Choose an event to inspect its data.