How to Build a Feature While You Sleep

We got Ryan Carson on the pod to break down the “Ralph Wiggum” Agent and why it’s suddenly everywhere. He walks me through a simple workflow that lets an autonomous agent build a full product feature while I sleep: start with a PRD, convert it into small user stories with tight acceptance criteria, then run a looped script that ships work in clean iterations. The big idea is you’re not “vibe coding” one giant prompt—you’re giving the agent testable, bite-sized tickets and letting it execute like an engineering team. By the end, Ryan shows how this becomes repeatable (and safer) with a memory layer—agents.md for long-term notes and progress.txt for iteration-to-iteration context.

Timestamps

00:00 – Intro

02:44 – What is the Ralph Wiggum AI Agent

03:40 – Step 1: PRD Generator

06:11 – Step 2: Convert PRD to Json

09:47 – Step 3: Run Ralph

12:05 – Step 4: Ralph Picks a Task

13:14 – Step 5: Ralph Implements Task

14:49 – Tokens + Cost: What It Actually Spends

15:45 – Guardrails: Small Stories + Clear Criteria Keep It Sane

16:19 – Step 6: Ralph commits the change

16:38 – Step 7: Ralph Updates PRD json file

16:55 – Step 8: Ralph Logs to Progress txt

20:08 – Step 9: Ralph Picks another Task

20:48 – Step 10: Ralph Finishes Tasks

21:18 – Example of how Ryan uses Ralph

24:08 – How To Start Today (Ralph Repo) and Tips

Links Mentioned:

Ralph Wiggum Agent: https://startup-ideas-pod.link/Ralph-agent 
AI Agent Skills: https://startup-ideas-pod.link/amp-skills 
AMP: https://startup-ideas-pod.link/amp-code 
Ryan’s Ralph Step-by-Step Guide: https://startup-ideas-pod.link/Ryans-Ralph-Guide

Key Points

• I can’t expect “sleep-shipping” unless I translate the feature into small, testable user stories with clear acceptance criteria.

• Ralph works like a Kanban loop: pull one story, implement, commit, mark pass/fail, then grab the next.

• The real leverage is the reset: each iteration starts fresh with a clean context window, instead of one giant, messy thread.

• agents.md becomes long-term memory across the repo; progress.txt is short-term memory across iterations.

• The bottleneck isn’t “coding”—it’s the upfront spec quality: PRD clarity, atomic stories, and verifiable criteria.

The #1 tool to find startup ideas/trends - https://www.ideabrowser.com

LCA helps Fortune 500s and fast-growing startups build their future - from Warner Music to Fortnite to Dropbox. We turn 'what if' into reality with AI, apps, and next-gen products https://latecheckout.agency/

The Vibe Marketer - Resources for people into vibe marketing/marketing with AI: https://www.thevibemarketer.com/

FIND ME ON SOCIAL

X/Twitter: https://twitter.com/gregisenberg

Instagram: https://instagram.com/gregisenberg/

LinkedIn: https://www.linkedin.com/in/gisenberg/

FIND RYAN ON SOCIAL:

X/Twitter: https://x.com/ryancarson

Amp: https://ampcode.com