From Copywriter to AI-Native Marketer: The Full Playbook with Shaun Thresher

Shaun Thresher built his own AI powered second brain, using Claude Code, to run his marketing and copywriting work end to end. In this episode, Shaun walks through how he moved from bouncing between two separate AI chat windows to a single centralised system that reads his voice, his clients' details and his workflows before it writes a word.

He explains why one well briefed agent with multiple skills beats a pile of specialised agents, how he trains AI to score new content against his best performing posts so it stops sounding repetitive, and how he uses AI to dig up prospect lists most competitors never find, including one built from a public FDA compliance database. Whether you're just starting to explore Claude or ChatGPT, or you're ready to build a proper system around your marketing operation, this conversation is full of practical, hard won lessons.

Guest Introduction

Shaun Thresher is a copywriter turned AI systems builder who spent eight years at Agora Financial, a top US direct-response shop, before becoming CMO of online assets at a publicly-traded company and later CEO of one of its e-commerce brands. He now runs BioRevGrowth, building AI powered "second brain" systems for marketers, and since January 2025 has led marketing and technical operations for a US-based long COVID doctor. 

Key Topics

Moving from copying and pasting between ChatGPT and Claude to a single centralised second brain, built and stored in GitHubThe difference between agents, skills and workflows, and why Shaun now favours one well briefed content agent with multiple skills over many separate agentsHow Shaun sources prospect lists from public databases, including an FDA compliance database, instead of relying solely on paid tools like ClayBuilding a "digital fingerprint" from a client's best performing content so AI generated posts match their voice and toneScoring new content against a curated pool of top performing past content to avoid repetitive, generic AI output ("AI slop")Why Claude Code offers more flexibility than a standard chat interface, including API and MCP connections into tools like Google Ads and Meta AdsCommon pitfalls: memory systems that quietly stop working, and installing unfamiliar agents without understanding how they operateAdvice for marketers starting out: pick one problem to solve, invest in a higher tier AI plan, and find a community for support

Resources & Links

People Mentioned

Ethan Mollick - Wharton professor and AI researcherNate B. Jones - AI strategist and newsletter writerDavid Arnoux - runs the GenAI Circle community Shaun is part of

Companies & Tools

BioRevGrowth - Shaun's growth and revenue consultancy for biotech and nutraceutical companies Clay - data enrichment and outreach platformGitHubVercelChatGPT and OpenAI CodexClaude Code / Claude DesktopGoogle Ads, Meta AdsFirecrawlZernio -social media scheduling and publishing APIRemotion - animation library used for content generationSecond Brain 2.0 - the pre-built go-to-market agent system Shaun purchased and plugged into his own setup.

Contact & Credits

Host: Shahin Hoda

Guest: Shaun Thresher

Produced by: Shahin Hoda and Alexander Hipwell

Edited by: Alexander Hipwell & Dave Somido

Music by: Breakmaster Cylinder

Podcast Co-ordinator: Jonah Igsie

APAC's B2B Growth Podcast is Presented by xGrowth