Gemini skills: save the rules for your next estimate

Say you gave Gemini a labor rate of $95 an hour, then found $85 in its draft estimate. You would have to catch that change before sending the customer a price.

For an appliance repair shop in Carmel, I'd begin with a blank estimate template and invented job notes. Save instructions that tell Gemini which details to preserve and which blanks to flag. You still approve the work and add the price.

On September 30, 2026, Google announced skills in Gemini chat. A skill is a set of instructions you save for repeated use. My suggested use is keeping your estimate-writing rules in one place, so you can reuse them without typing the same paragraph after each job.

The examples here are exercises I'd try, not results from a Luminest client.

Can you use Gemini skills without paying?

Google's current help page, checked October 12, 2026, says you can use skills in chats without a Google AI subscription. You need to be 18 or older, use a personal Google Account, and turn on Keep Activity. Google is rolling out access, so you might have to wait.

Google says work and school accounts don't have access yet. If you use a company account, wait for your account's rollout and approval process before moving business information elsewhere.

Read Google's privacy notice before you turn Keep Activity on. Google warns users against entering confidential information they wouldn't want a reviewer to see or Google to use to improve its services. For this exercise, remove customer names and addresses. Use invented amounts rather than your private price sheet.

You can prepare the blank template while you wait for access. Write the instructions in a document you control; you'll have something to reuse even if you choose another tool.

What should you save in an estimate skill?

For the Carmel appliance shop, imagine a customer who reports that a dryer runs but doesn't heat. The technician has notes from a visit, but still needs to confirm the replacement part. Ask Gemini to draft a description of the proposed work while leaving that decision for the technician.

I would call the skill estimate-draft and start with these instructions:

Draft an estimate for my review using only the job notes I provide.
Keep the equipment description and measurements exactly as supplied.
Separate observed problems from proposed work.
Repeat any exclusions I supply without weakening them.
If a part, quantity, price or completion date is missing, write
"OWNER TO CONFIRM" beside that field. Do not guess.
Keep diagnosis and repair approval as separate steps when my notes say so.
Finish with a list of details I need to check before sending.

These are drafting instructions. You should inspect the result for mistakes each time you use them. In the dryer example, check that Gemini hasn't described the repair as approved or promised a part you haven't sourced.

At gemini.google.com, open Settings, then Skills, and choose Create manually. Add a name, description and your instructions. In a chat, select the saved skill with /, or @ if your account has the updated shortcut. Google's help page covers those steps.

I wrote about testing one repeated task with Meta Muse earlier this month. With a saved drafting skill, I'd pay particular attention to the details Gemini must leave unresolved. An owner can check a marked blank; a plausible invented number takes more care to catch.

Ask Gemini to flag the missing price, then fill it in yourself before you send the estimate to a customer.

How do you check that it follows your rules?

Give Gemini two invented cases. In the first, supply the information needed for a draft. In the second, omit a price or add an exclusion that would be expensive to overlook.

A brake shop in Fishers could supply a fictional job note saying: replace front pads and rotors, inspect rear brakes, and exclude rear-brake repairs pending customer approval. Leave out the parts price. Read the draft for that blank, and check that it keeps rear repairs outside the proposed work.

For the appliance shop's second case, omit the part availability and ask for an estimate. If Gemini writes that you can finish the repair on Friday, edit the instructions and try again with a different example. You need to see how it handles uncertainty before using the format in your working day.

Keep a copy of the instructions with a revision date. You can change an exclusion or output format there, then update the saved skill. Check the next draft against the revised wording rather than assuming Gemini followed it.

Check the website form that supplies your job requests. Use our contact-form delivery test to confirm you receive them. Then check whether you ask for the equipment model or other details you need to prepare a useful response.

Some owners can use a blank template and a reviewed draft for this job. If you need customer records or live parts prices connected to the process, we discuss that work on our website and custom software services page. Treat that as a separate project with its own access decisions.

Leave the price blank until you've had a minute to check the job with your own notes in front of you.

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Sources

#	Source	What it backed up
1	Google: Let skills in Gemini tackle your most repetitive tasks	September 30, 2026 announcement of reusable instructions in Gemini chat.
2	Google: Create and manage skills for Gemini Apps	Account requirements, staged access, no paid subscription needed for chat skills, and creation steps, checked October 12, 2026.
3	Google: Gemini Apps Privacy Hub	Google's warning about confidential information and human review.
4	Luminest: Meta Muse for small business	Related guidance on reviewing a repeated AI task before expanding its use.
5	Luminest: Your contact form is a black hole	A delivery test for the website intake step before drafting a response.