Hello, workflow (60 seconds)

Goal

Create a workflow with one Bash block that publishes ok: true. Time: 5 minutes. Needs: Bash on PATH.

Steps

Open Workflows (Cmd/Ctrl+Shift+G) and choose New workflow.
Under Settings (next to Editor), name it Hello workflow.
Add a Code block. New Code blocks start as Bash.
In Properties → Code, set the snippet to:
```
echo '{"ok":true}'
```
Open Properties → Schema and add a property named ok with type boolean.
Click Save, then Run.

The same workflow as YAML

Open the YAML tab. You should see something like this. The block ID is generated, so yours may differ.

schema: 1
name: Hello workflow
id: hello-workflow
blocks:
  - id: hello
    name: Hello
    kind: code
    language: bash
    body: |
      echo '{"ok":true}'
    outputs:
      type: object
      properties:
        ok:
          type: boolean

Tip

You can also paste YAML straight into the YAML tab and switch back to Editor. The rest of the course often gives you YAML to paste, because it’s the quickest way to get to a known starting point.

Check your run

The card shows Running, then Done.
Properties → Output shows ok: true, together with exit: 0 and status: ok.
Your terminal stayed usable throughout, because workflows don’t block the prompt.

Why the last line matters

Because the block declares an output (ok), the last non-empty line of stdout must be one JSON object, and that object must include ok as a boolean. Stage 2 covers this rule in detail.

Exercise

Change the snippet to print Starting… before the JSON line. Does the block still pass? Then try printing Done after the JSON.

Details

echo Starting… followed by echo '{"ok":true}' passes, because only the last non-empty line is parsed. Printing Done after the JSON fails with The last non-empty line of code output must be a JSON object. Send diagnostic messages to stderr (echo Done >&2) instead.

Reference: Build a workflow → In 60 seconds