Prototype product features as a non-coding PM

Documented elsewhere: eric Xiao cloned his trip-planner codebase and had Cursor describe it. He saved that description as an AGENTS.md file so new chats start with context. The agent located gaps such as no saved trips, loading indicator, map or follow-ups, and drew wireframes for each.

Agent or tool

Cursor

Topic

Software Development

Reported on

X

Added

2026-10-15

Why it matters

Coding agents are moving from autocomplete to doing whole tasks: reading a codebase, making a plan and changing many files. This case is a concrete example of where that works in practice. It is one of 106 sightings filed under Software Development on Agent Sightings (number 4 by interest), and one of 30 involving Cursor.

How you could try it

Here is a reusable prompt, written by us in our own words, that captures the task. Paste it into Cursor or any similar agent and adjust the details to your situation.

In this repo, prototype product features as a non-coding PM. Read relevant code, apply a minimal patch, run available checks, and summarize the diff. Stop before merge or deploy.

Copy prompt

The prompt breaks down into 3 steps you can check as the agent works:

1. In this repo, prototype product features as a non-coding PM.
2. Read relevant code, apply a minimal patch, run available checks, and summarize the diff.
3. Stop before merge or deploy.

Source

Read the original first-hand account on X: https://x.com/leerob/status/2041969870234120231. Our summary is a paraphrase; details are in the source.

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