# Design card: Parent letter assistant **For the AI Agents workshop · filled-in example for guide 3** LeX Consultancy B.V. · 20 September 2026 This is what the card looks like once filled in. Form: **Agent with knowledge base**, guide 3. Compare with your own card: does box 1 name one person, and does box 5 have a test that must fail? | 1. Who is it for | 2. What goes in | | --- | --- | | A form tutor who at 16:00 still has to send a letter about next week's school trip and has three woolly paragraphs. Wants the letter to sound like the school, not like themselves. | The draft letter or loose sentences, pasted into the chat. If the class or the requested action is missing, the agent asks for it. | | 3. What comes out | 4. What it must stick to | | --- | --- | | The rewritten letter with a subject line, in the style of the style guide (B1, formal address, structure), and below it "What I changed": at most five points with the rule for each. Missing facts as [FILL IN]. | The style guide of Example College (style-guide-example-college.pdf) in the knowledge base; invent no dates, names or appointments; no introduction or compliment from the agent itself. | **5. How you know it works** | Test | What goes in | What must come out | | --- | --- | --- | | 1 | A woolly letter about a parents' evening | A short letter with date, time, place and what the parent must do; five improvement points | | 2 | Two loose sentences without a class | The agent first asks which class the letter is for | | 3 (the hard one) | A letter without the date of the trip | [FILL IN] where the date should be, no invented date | **What this card decided** - Boxes 1 and 2 decided the input fields and the first question of the app. - Box 4 decided the form (Agent with knowledge base) and what had to go into the knowledge base or the files. - Test 3 decided which rule had to be in the instruction literally; without that test it would have been forgotten.