How to use ChatGPT agent for breakfast groceries
ChatGPT agent ordered breakfast groceries through Instacart after human cart edits and approval; slow substitutions and a missing delivery alert added friction.
linkedin.com
Original prompt
Shared by the source author. See source notes for context.
plan and buy ingredients to make Japanese breakfast for four.
Reach people exploring AI agents
See placements →What happened
A reduced grocery order was purchased and delivered on time; slow edits, an oversized initial cart and missing delivery notification limited the experience.
Reported by Sky Canaves — LinkedInHow the agent did it
- The agent converted the breakfast request into an HEB cart through Instacart after a human login takeover.
- Canaves requested a fish substitution and removed unwanted or already-owned pantry items from the costly proposed cart.
- The agent requested transaction confirmation; the order arrived on time but without the expected delivery notification.
Where a person stepped in
Canaves authenticated, corrected substitutions and pantry duplicates, reviewed spending and confirmed the consequential transaction.
Sky Canaves tested ChatGPT agent on the launch example of buying ingredients for Japanese breakfast for four. The run reached a real order and delivery, but required substantial correction rather than simply translating a meal idea into an appropriate purchase.
The agent could not shop directly from the local retailers she tried, so it used HEB through Instacart. Canaves took over the virtual browser to log in. Shopping was slow, and a requested substitution from farmed to wild salmon took much longer than she expected.
The proposed cart was around $130 before fees and tip and included ingredients already in her pantry. Canaves took control again to remove unwanted items. The agent requested confirmation before completing the transaction, and the resulting order arrived on time.
Delivery still had a practical failure: neither ChatGPT nor Instacart sent the notification she expected, leaving fish outside in the Texas heat. The demonstrated outcome is a completed, human-corrected grocery order, with pantry knowledge, spending limits, substitution latency and post-purchase notification all exposed as parts of the workflow that the initial meal prompt had not resolved.
Prompt
Original prompt
Source: LinkedIn · Sky Canaves
Frequently asked questions
Was the full proposed cart purchased?
No. Canaves removed items she already had or did not want.
Did the agent pay without confirmation?
No. The author explicitly reports a request for confirmation before transaction completion.
What happened after delivery?
The order arrived on time, but the expected delivery notification did not arrive.
More details
About this account
The agent converted the breakfast request into an HEB cart through Instacart after a human login takeover. Canaves requested a fish substitution and removed unwanted or already-owned pantry items from the costly proposed cart.
Full original post and exact main publication JSON-LD read. Original prompt was an OpenAI example the author explicitly reused. Initial $130 estimate excludes fees/tip and is not the final paid total. Original prompt excerpt.
Credit: Sky Canaves — LinkedIn
Source published 15 Sept 2025
Source checked 14 Oct 2026
Tools and topics
ChatGPT agent · Instacart · HEB
grocery checkout · pantry duplicates · delivery notification
Editorial completeness: 100/100. Measures documented fields, not agent performance or verified outcomes.