Fill a Walmart pickup cart with 26 meal-plan groceries using ChatGPT computer control, stopping before checkout

Posted

Aug 24, 2026 by Arthur Sullivan (LinkedIn)

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Last checked

Oct 17, 2026

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Method:

How we verify

Evidence: Described by posterThe person describes what happened in words, without screenshots or video.

Outcome

With school and sports starting, Arthur Sullivan had ChatGPT make a meal plan and grocery list, then logged into Walmart and asked it to arrange the order: pickup time, store brands over name brands, and no purchase without review. Using ChatGPT Work's computer control, it added all 26 items to the cart; the only mistake was one lemon instead of two. Sullivan reviewed the order before buying.

Agent

ChatGPT

The source didn't share its exact prompt, so we wrote this from what it describes.

Run this task now, exactly as written below. Everything you need is here, so start straight away and only stop if something required is missing or a rule below tells you to.

Goal: Turn my meal plan's grocery list into a ready-to-review online grocery cart, without checking out.

Fill in before running:
- The grocery list with quantities: [LIST]
- Store and pickup or delivery time: [STORE / TIME]
- Preferences (e.g. store brand first, organic, budget): [PREFERENCES]

Rules:
- I'll sign in myself before you start.
- Add each item at the quantity on the list and follow my brand preferences.
- If an item is missing, pick the closest match and note it.
- Do not check out or pay; stop when the cart is ready.
- If a site asks me to sign in, pause and let me do it myself (including any CAPTCHA or two-step code); never guess or store passwords.
- Ask for my OK before you pay, book, send, submit or cancel anything.
- Check facts that can change (prices, opening hours, dates, availability, rules) against the official source, and tell me anything you couldn't verify.

Output: A filled cart and a list of every item added, with substitutions and quantity checks marked.

You'll know it worked when: the cart matches my list item-for-item and I only need to review and pay.

Run this task now, exactly as written below. Everything you need is here, so start straight away and only stop if something required is missing or a rule below tells you to.

Goal: Turn my meal plan's grocery list into a ready-to-review online grocery cart, without checking out.

Fill in before running:
- The grocery list with quantities: [LIST]
- Store and pickup or delivery time: [STORE / TIME]
- Preferences (e.g. store brand first, organic, budget): [PREFERENCES]

Rules:
- I'll sign in myself before you start.
- Add each item at the quantity on the list and follow my brand preferences.
- If an item is missing, pick the closest match and note it.
- Do not check out or pay; stop when the cart is ready.
- If a site asks me to sign in, pause and let me do it myself (including any CAPTCHA or two-step code); never guess or store passwords.
- Ask for my OK before you pay, book, send, submit or cancel anything.
- Check facts that can change (prices, opening hours, dates, availability, rules) against the official source, and tell me anything you couldn't verify.
- Before stopping, re-read the list and compare quantities against the cart line by line.

Output: A filled cart and a list of every item added, with substitutions and quantity checks marked.

You'll know it worked when: the cart matches my list item-for-item and I only need to review and pay.

Before you finish: re-read my goal and constraints, check your answer against each one, and list anything you assumed or couldn't confirm.

Source

https://www.linkedin.com/posts/arthurjsullivan_this-weeks-practical-ai-experiment-meal-activity-7497760598911279104-RWvL