A successful demo tells you what a skill can do with one clean input. Before giving it real files, make three small fixtures that reveal where you need a human check.
- A clean fixture. Make a synthetic invoice with a date, an invoice number and a total. Write down the expected output before running the skill.
- A missing field. Remove the date. Check that the skill leaves it blank or flags it for review. An invented date should fail the test.
- An ambiguous value. Add two totals with clear labels. Check whether the skill picks the requested field and preserves the original value for review.
Run each fixture in a scratch folder and compare the results with the same expectations each time. Keep the inputs and expected outputs together so you can repeat the check after an update.
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