Expected vs observed

1. Download the bug version of the practice app from the link below this lesson. Put it in a new folder, for example ai-native/practice-bug. Don't overwrite your working copy.
2. Open it in OpenCode, make a save point, then ask OpenCode to start it (node serve.mjs) like last lesson.
3. In the browser, submit "Repair the light". Check that it appears in the list.
4. Refresh the page.
5. Watch what happens. Do it once more to be sure.
6. Create a file called BUG-REPORT.md in the folder (ask OpenCode to make it, or use a text editor) and fill in:

Expected:
Observed:
Steps to reproduce:
1.
2.
3.

Do not ask the agent to fix anything yet. Today you only describe.

You're done when a classmate could follow your three steps and see the same thing, without asking you a single question.

(Hint: Observed should be something like "the request disappears after refresh." Not "the database is broken." You don't know that yet!)

• A bug is a gap between expected and observed.
• A good report has three parts: expected, observed, steps to reproduce.
• Observed means only what you saw. Save guesses for next lesson.

Next lesson (5.3): you hand this report to the agent and ask why before anyone fixes anything.