Mr. Mustard presents // Insert ambition to play // 1 free credit

One seed. 1x the output.

A personal AI coach, a four-track curriculum, and the exact prompts to ship software, design, and ideas with nothing but your Claude subscription. Mr. Mustard trains you. Claude does the reps. Your first coaching session starts on this page, free.

mr-mustard — coach session 001
$ [MUSTARD MODE: ON] // 1 free credit
INSERT AMBITION TO PLAY. What do you want to build?
>

FREE PLAY = 1 LIVE COACHING RUN + THE STARTER PROMPT SAMPLER. NO CARD. NEVER USED CLAUDE OR A TERMINAL? START HERE FIRST →

See the levels

The method // How it plays

A coach, a game, and a machine that builds.

01

Mr. Mustard trains you

A live AI coach who knows your track, your mission, and the thing you said you want to build. He gives you the next rep, checks your work, and keeps score.

02

Claude does the reps

Every mission is built on your own Claude subscription. You learn by shipping real artifacts (apps, pages, specs, systems), never by watching videos.

03

You keep the multiplier

XP and streaks are the game. The prize is the skill: after four tracks you run Claude like the studio does, on everything, forever.

The machine // A real session, replayed

This is what an evening looks like.

claude — a real session, replayed● REC

Four tracks // 28 missions // 4 boss fights

Pick your cabinet.

[ TRACK 01/04 ]7 MISSIONS

CODE

Ship real software

Boss mission

Take one idea of your own from empty folder to a working web app that anyone can open on a live URL.

Install Claude Code and open your first sessionThe describe, build, run, refine loopGive your project a memory with CLAUDE.md+4 more
[ TRACK 02/04 ]7 MISSIONS

DESIGN

Design like a studio

Boss mission

Take one real page that looks generic and rebuild it into something you would proudly put in a portfolio.

Write a brief that kills the generic AI lookDesign tokens and three directions before you commitCritique and iterate with screenshots+4 more
[ TRACK 03/04 ]7 MISSIONS

COWORK

Your AI chief of staff

Boss mission

Run one full workday with Claude in the loop on everything you do, and document the hours you got back.

Build the daily briefing habitWrite in your own voice, not robot voiceResearch and synthesis that gives you decisions+4 more
[ TRACK 04/04 ]7 MISSIONS

IDEATE

From spark to spec

Boss mission

Turn one fuzzy dream project into a validated one page spec that is ready to hand straight to the CODE track.

Excavate the idea that is stuck in your headPressure test it with Claude as a skepticTalk to the market and find your position+4 more

Proof // Not theory

This is the studio's own operating system.

Mr. Mustard, your coach

Nothing in MUSTARD MODE is a course-creator theory. Every mission, prompt, and blueprint is the working method behind the storefronts, voice agents, client builds, and tools Modern Mustard Seed ships solo, daily, with Claude. You are not buying information. You are installing an operating system that is already running a real studio.

30+

products and client systems shipped by this studio with Claude, most by one person

4

live AI voice agents answering real phone numbers, built the same way you will learn

1

method. The one Modern Mustard Seed runs every single day. Now with a coach.

A manifesto

The era of the entrepreneur

One person with a coach and Claude can now build what used to take a team of fifty.

That is the era we are in. MUSTARD MODE exists to hand you the tools and the reps.

Built forfounders
Get your tools

Where we stand

Integrity in AI is not a footnote here.

A coach who only cared about speed would teach you shortcuts. Ours cares about the name on the work. MUSTARD MODE is built on three rules that do not bend, whether you are shipping a hobby project or something your business depends on.

[ 01 ]

You own what you ship

Claude writes the code. You make the calls. Every mission ends with you understanding what you built well enough to explain it, not just paste it.

[ 02 ]

Say when AI built it

If a client, a boss, or a reader would care that AI was in the loop, tell them. Speed is not a reason to be quiet about how the work got made.

[ 03 ]

Amplify skill, never replace judgment

The coach exists to make your taste and your standards travel faster, not to make them optional. A tool that thinks for you stops working the day you need it most.

Choose your level // Lifetime access on 01 and 02

Insert coin.

[ LEVEL 01 ]

Player

$197

The full coach app. Learn the method, run the missions, ship.

  • ■Mr. Mustard, your live AI coach (chat, on the Claude API)
  • ■All 4 tracks: Code, Design, Cowork, Ideate (28 missions)
  • ■The full prompt library (42 battle-ready prompts)
  • ■Progress HUD: XP, streaks, milestones
  • ■Lifetime access and free updates
MOST PICKED[ LEVEL 02 ]

Builder

$397

Everything in Player, plus the vault and a real human review of what you ship.

  • ■Everything in Player
  • ■The Builder vault: 9 complete blueprints and templates
  • ■Ship-off: submit your boss-mission build for a personal review from the studio
  • ■Founding cohort badge on your HUD
[ LEVEL 03 ]

Founders' Cabinet

$97/mo

The inner circle. Build alongside Sarah, monthly, with everything included.

  • ■Everything in Player and Builder, included while active
  • ■Monthly live build-along with Sarah
  • ■Every future drop and track, day one
  • ■Priority coach lane

[ LEVEL 00 ] FREE PLAY. Your first coaching session starts on this page. One free credit, no card.

PLAY YOUR FREE CREDIT ↑

The guarantee, printed in mono

Play the method for 14 days. If you do the missions and MUSTARD MODE does not change how much you ship, email Sarah for a full refund. No questions, handled by hand.

Price check

Set it against one month of a developer, one bootcamp deposit, or one more year of not building. The whole method is less than a nice dinner out per track, once.

Player questions

Do I need to know how to code?+

No. MUSTARD MODE assumes nothing but curiosity and a Claude subscription. The Code track takes you from your first Claude Code session to a live shipped app, and the other three tracks need zero code at all.

What do I need to play?+

A Claude subscription (the regular one you may already have), a computer, and about 30 minutes per mission. Mr. Mustard handles the rest.

How is the coach different from just using Claude?+

Mr. Mustard knows the method, your track, your mission, and what you said you want to build. Instead of a blank chat box, you get a coach who tells you the next rep, checks your work, and keeps score. The skill you build transfers to every Claude session you ever run.

How is this different from The Terminal?+

The Terminal is our self-study engineering program (a deep playbook plus ops dashboard, $497). MUSTARD MODE is the coach-led experience: a live AI coach, four tracks beyond just code, missions, XP, and a prompt library. Many people run both. If you want a coach on your shoulder, start here.

How long does it take?+

Each mission is 15 to 60 minutes. Most players finish their first track inside two weeks and ship their boss mission (a real, live artifact) by week three.

What exactly happens after I buy?+

Checkout takes a minute. You get an access link by email, your HQ opens instantly, and if you played your free credit, your run is already loaded. Mission one starts immediately.

Refunds?+

Yes. Play the method for 14 days. If you do the missions and it does not change how much you ship, email Sarah for a full refund. Handled by hand, no forms.

[ MUSTARD MODE: ON ]

The seed is small.
The tree is not.

Choose your level

Already playing? Open your HQ