Give your technicians a phone assistant that knows your manuals and past repairs: AI agent prompt
When a technician on site is stuck, the answer is usually in a manual or in how someone fixed the same machine last time. Put both in one searchable library that technicians can ask from their phone, and let them mark answers right or wrong so it improves. In an Oct 9, 2026 post, Jorge Garzón, who runs a small family car-wash equipment repair company in Spain and isn't a programmer, described building this with Claude Code: technicians ask about a model's fault and get likely causes, what was done last time on that same machine, and the manual page, while anything involving money still needs his approval on his phone.
OperationsField repair knowledge baseadvancedThe prompt
Help me set up a repair assistant my technicians can ask from their phones. We service [type of equipment, e.g. HVAC units / car-wash machines / restaurant equipment]. I'll give you: the manuals and parts diagrams for these models [attach PDFs or list them], and our past repair notes [paste or attach, e.g. date, customer, machine model, fault, what fixed it]. First, organize the repair notes into a table by machine model and fault, and point out notes that are too vague to be useful. Then answer technician questions this way: 1) the 3 most likely causes, ranked; 2) what we did last time on this exact model or machine, with the date; 3) the manual and page to check; 4) safety warnings from the manual. If the answer isn't in the manuals or notes, say so instead of guessing. Test it now with these 3 real questions from my team: [paste questions]. Finally, suggest the simplest way to put this on our phones with [tool, e.g. a Claude Project / Custom GPT / NotebookLM] and how technicians can mark an answer right or wrong.
How to use it
- Copy the prompt above.
- Replace every [bracket] with your own details (or fill in the blanks on AgentPlaybook Real Estate, which remembers your answers for the next prompt).
- Paste it into Claude Code, Claude Projects, ChatGPT and review the answer before you use it.
Works with: Claude Code, Claude Projects, ChatGPT, NotebookLM, Telegram
Real-world example: dev.to/satgarzon/two-years-in-a-family-car-wash-service-company-runnin
Featured in: AI prompts for contractors, construction and field service businesses
Before you use it: what to check
Check yourself
- Remove names, contact details, account numbers and other personal data the task doesn't need before you paste, and check your AI tool's data and training settings.
- Read and edit the draft before it reaches a customer or goes public. If you later automate this prompt, start with "draft and notify me", not "send automatically".
- Check names, dates, numbers and any claim against your own source material before you use the answer. AI can misread or invent details.
Using an AI agent? Download this prompt as a SKILL.md agent skill with these checks built in, or get the .zip for Claude.ai. How to install skills.
Want to make this prompt even better? Grade it with the free prompt grader or build your own with the AI prompt generator.
32 copy-paste agent prompts (PDF) plus 5 new prompts every week.
Get it free