Compare: one task, two briefs · The Sandbox

1. Scenario

Pick a work role starter with synthetic material, or switch to Bring your own.

Bakery wholesale delivery delay text

Small Business · Synthetic material

You run a six-person wholesale bakery. Your early van had a flat tyre on the ring road at 05:40, and four café customers will get their sourdough and pastry crates 45 minutes late.

Synthetic dispatch note, River Mill Bakery (05:50):
- Route 2 van had a punctured front tyre at 05:40; spare fitted, van moving again at 05:55.
- Affected stops: Corner Cup (new ETA 06:50), Station Kiosk (new ETA 07:10), Park Café (new ETA 07:25), Library Coffee (new ETA 07:40).
- All sourdough loaves and morning pastries are onboard and still warm in insulated crates.
- If any café opens before their new ETA and wants to cancel today's pastry tray for a full credit, reply 'CREDIT' to this text before 06:30.

2. Work area

Edit the briefs or setup below before you run.

Brief A (the vague or tempting ask)

Brief B (named audience, locked facts, clear structure)

Output A

Example. No model ran.

Good morning, We are so sorry for the inconvenience this morning, as our Route 2 delivery van unfortunately suffered a flat tyre on the ring road at 05:40. Our driver has worked quickly to change the wheel and is back on the road now. Your sourdough and pastries are safe in insulated crates and will be with you about 45 minutes later than usual. If the delay causes an issue for your opening, please let us know and we can arrange a credit for your pastry tray.

Output B

Example. No model ran.

Hi [Café Name], River Mill Bakery here: your delivery today has a new ETA of [New ETA] after a flat tyre on Route 2 (van is moving again now). Your full sourdough and pastry order is onboard in insulated crates. If you open before [New ETA] and want to cancel today's pastry tray for a full credit, reply CREDIT before 06:30.

3. Run

Nothing leaves your browser until you press Run.

Sends the scenario material and the two briefs you run. to job sandbox_run (claude-haiku-5-5, effort low). Raw text is processed in memory and not stored.

4. Inspect

See what left the browser, which model ran, and the receipt.

Example. No model ran. · source: offline

What left the browser

Nothing sent yet. Showing the built-in offline example.

What stayed on device

Your draft briefs and scenario selection on this device.

Model and job

sandbox_run · claude-haiku-5-5 (effort low, max 1500 tokens). Fast Haiku runs keep side-by-side brief comparisons under a few seconds so you can test small wording changes.

Runs and source

0 runs used · source: offline · Example. No model ran.

5. Judge

Which brief gives a café owner opening up at 06:00 their exact new delivery time and credit option on one phone screen?

Kept the facts

Matched the tone

Stayed within what it knew

Usable without heavy edits

How sure are you75%

50 is a coin flip. 99 is certain. Honest confidence scores best.

6. Debrief and Keep

What to check next time, the matching lesson, and keeping this setup as a recipe.

What to check next time

A café owner unlocking the door at 06:00 does not want three sentences of apology before finding out when the bread arrives. Putting the ETA in the first sentence and naming the exact reply keyword makes the message useful immediately.

Lesson: TokensSkill: before you send

Keep as a recipe

Save the stronger brief and scenario setup to your device so you can reuse or adapt it in Keep.

Open Keep