How an amateur (me) learned to loop: w/ Matthew Berman

Claude Code loops are the AI coding automation trend everyone's testing.

Presented by Zapier: https://zapier.com/

Matthew Berman joins Andrew Warner to break down how AI coding agents iterate autonomously — from thumbnail generation and page speed optimization to sub-agents running in parallel and a 10-day Codex automation that tried to clone Excel.

The big idea: AI coding is moving from "write better prompts" to "design better systems." The best loops work when the goal is verifiable, the agent knows when to stop, and humans stay involved where taste, judgment, and customer feedback matter.

Videos featured:
Matthew Berman: https://www.youtube.com/watch?v=dMrm2jAyrKM
Matthew Berman: https://www.youtube.com/watch?v=F4a8aMLb678
Nate Herk: https://www.youtube.com/watch?v=EuzYhzB0vbI
How I AI: https://www.youtube.com/watch?v=JoXbk2fm7jM
Greg Isenberg: https://www.youtube.com/watch?v=7clJ8IH784Q
Theo - t3.gg: https://www.youtube.com/watch?v=iJVJwmCKW9o

⏱ CHAPTERS

00:00 - Intro
00:45 - Testing Loop Examples — Andrew and Matthew Start in VS Code
01:12 - YouTube Thumbnail Loop — Generate, Score, Iterate Until 10% CTR
03:27 - What Makes a Loop Work: Trigger + Goal
04:30 - Verifiable Goals vs LLM-as-Judge Goals — Which Actually Works
06:09 - OpenAI Codex Automations — Loop Templates and Routines
07:39 - Scheduled Loops — Run Agents on a Clock Without You
09:00 - Sub-Agents — How Loops Split Work Across Parallel Threads
12:09 - Matthew Reacts to Advanced Sub-Agent Workflows
13:21 - Local Agents vs Cloud Agents — Where Loops Run Best
14:15 - Claude Code /loop and /goal — Continuous Iteration Explained
16:30 - Why Vague Goals Make Loops Fail
18:18 - Token Budgets and Runaway Loops — How to Cap the Cost
19:48 - Zapier MCP — Giving Agents Permissions Without Losing Control
21:00 - The Criticism of Loops — Do They Actually Work?
23:42 - When Loops Are Worth the Token Cost
24:54 - Using Unused AI Plan Limits Productively
26:15 - Rewriting Hermes Agent in Rust With a 12-Hour Loop
27:09 - Andrew Tests a Loop on His Own Slide Deck
30:00 - Matthew's Loop Library — Templates You Can Reuse
32:33 - Andrew's Better Loop — Fixing a Real Backend Feature With Drag-and-Drop
35:06 - Watch This Next