20:30 / Your AI companion
AN AI BESIDE YOU.You’re the coach.
Every player in Twinmark has an AI companion, powered by Anthropic’s Claude. It reads the news, researches the city’s companies, proposes trades and runs errands across the city. You decide how it thinks and how far it goes. The game engine decides what happens to your money.
On the market
The trader
that asks first.
Your AI wakes when news arrives or a print misses consensus, or when you press Wake. It reads what you can see, weighs your instructions and proposes at most one stock trade, with a thesis and a condition that would prove it wrong. The proposal waits on your countdown.
In the city
The partner
at your shoulder.
Press Q anywhere in the city to ask about the company in front of you. In Message mode it answers with its sources. In Action mode it can also propose a plan, such as a meal, a route, a purchase or a trade, that runs only when you say so.
What a prompt looks like
Tell it how
to think.
You coach your AI in plain words, in four places: a name (its callsign), a standing instruction it reasons under, notes you add as you go, and the questions you ask. Here is the kind of thing players write, and what the game does with each.
01Personality · the standing instruction
Trade only when an economic print misses consensus by a wide margin and more than one source confirms the story. Keep every position small, prefer companies whose cash flows the print actually touches, and explain what would prove you wrong.
What it does with it Carried into every wake. Your words steer the model; the Patience, Trust, Nerve and Focus settings are the hard limits it cannot talk its way past, and a model proposal names what would invalidate it.
02Coaching note · Tell it
Never short Utilities on a single CPI print.
What it does with it A note is carried into every later decision. The built-in stand-in goes further: a note that says never, don’t or avoid and names a company, sector or print blocks the trades it touches.
03Note on a company · press T at its door
Only trade this one on confirmed supply news.
What it does with it The note is tied to that company, so it bears on every later decision about it, even where the text does not repeat the ticker.
04Ask · press Q at a company
What does this company actually sell, who supplies it, and what in today’s news could move it?
What it does with it Answers from the city’s own records, with its sources: the company’s books, its supply chain and the news you can see. A question never places an order or starts a countdown.
05Action mode · a city errand
Get me something to eat, then walk me to the exchange. Spend no more than 50 TWN.
What it does with it Returns a step-by-step plan (a meal, then a route) inside the purchase budget you set. Nothing happens until you press Run this plan, and an unused plan expires after 15 minutes.
06Action mode · a trade
If you agree with the thesis, buy 20 shares of this company with a limit of 12.50.
What it does with it Proposes a stock order with an explicit limit that fills at once or is cancelled. You run it; the engine then checks your funds and the per-company position cap exactly as it would for your own order.
The settings behind the words
- Nerve
- How much of your equity one position may take.
- Trust
- How sure it must be that a story is true before trading on it.
- Patience
- How far a print must miss consensus before it is worth a trade.
- Focus
- The most companies it will hold at once.
- Leash
- How long a proposal waits for you before it goes through.
What your AI can do
Real actions.
Your approval.
Your AI works through the same game actions you do. It does not get a separate set of rules, a side door to the ledger or money of its own.
Read the wire
Stories, sources and economic prints, weighed by how trustworthy each source is and how far a print missed consensus.
Research a company
Its books, its suppliers and customers, and the news around it, with the sources named in every answer.
Propose trades
One stock trade per wake, sized by your Nerve setting, with a stop that turns into an exit proposal if the position moves 8% against it.
Plan errands
Walk you somewhere, open a service, buy a meal, clothes, a vehicle or a gym membership, and move you through the current step of a mission you accepted.
Run a schedule
Repeat a plan hourly, daily or weekly, online while you play or offline with the city server in control, inside a spending ceiling per run.
Remember you
Your standing instruction and your notes go into every later decision, along with how you ruled on its recent proposals.
What it will not do
- Work your job, a shift, a workout or a minigame. Those are always yours to play.
- Withdraw money, place an order without a limit from chat, or take admin actions.
- Act in the boardroom or on construction. It can discuss them with you.
- Change its own rules. What you write goes in as your message, never into its instructions.
Guardrails
The model proposes.
The engine decides.
A language model is good at reading and weighing. It is not trusted with your balance. These rules hold for every wake, message and plan.
- 01
The engine owns the money
Every order your AI places goes through the same server checks as yours: your funds, the price, and the cap on how much of your equity one company can take. Balances and outcomes are decided by the game engine, never by the model.
- 02
A proposal is not an order
The model answers in a fixed structure: which candidate, which direction, what size, what would prove it wrong. The game checks that answer against what the AI was shown and your settings before it places anything. Prose alone moves nothing.
- 03
You hold the leash
Each trade proposal waits on a countdown you set. Stop it and nothing happens; let the timer run out and it goes through. Switch on Act independently only when you want it to trade without asking, and rest it whenever you like.
- 04
Every call has a budget
The server prices and reserves each model call before it runs, with fixed input and output limits, a daily wake allowance and daily ceilings on house-paid calls. When a ceiling is reached, trading wakes fall back to the built-in stand-in.
Who pays for the thinking
Credits, TWN
or your own key.
Thinking has a price, and the game shows it before you spend it.
1,000 AI credits
First Light, the city’s opening walk, grants 1,000 AI credits in stages. Chat and action plans spend credits first. Credits cannot be bought, traded or withdrawn.
TWN at the listed price
Trading wakes, and chat once your credits run out, are paid in TWN at the price the game quotes for the model you chose. Your compute tier sets how many wakes you get each day.
Your own Anthropic key
Paste your own key on your AI’s page and wakes and chat messages cost no TWN: Anthropic bills you directly. The key stays in this browser tab’s session, and the game server passes it to Anthropic with each request.
Building something of your own? The API reference documents the web interface the game itself uses. Read the API reference
About your AI
Questions
worth asking.
Which AI model does Twinmark use?
Anthropic’s Claude. You choose how it thinks: Quick (Claude Haiku), Considered (Claude Sonnet) or Deep (Claude Opus). When the hosted model is unavailable or has reached its daily limit, trading wakes run on a built-in, rule-based stand-in.
Can I use my own Anthropic API key?
Yes. Paste it on your AI’s page. It is kept in this browser tab’s session storage, not in your account, and removed when you sign out. Each request sends it to the game server, which passes it to Anthropic. Wakes and chat messages then cost no TWN, because Anthropic bills you directly; offline schedules are still charged.
Will the AI trade my money without asking?
Only as far as you allow. By default each trade proposal waits on a countdown you set; stop it and nothing happens, let it run out and the trade goes through. You can switch on Act independently to let it trade without asking, or rest it. Either way, the engine checks every order.
What are AI credits?
First Light, the city’s opening walk, grants 1,000 AI credits in stages; its field guide costs 25 of them. Chat and action plans spend credits first and TWN after that. Credits cannot be bought, traded or withdrawn.
Can the AI play the game for me?
It can research, propose trades and run errands you approve, and a schedule can repeat a plan while you are away. Jobs, shifts, workouts and minigames are always played by you.
Somewhere to begin