CardGo Desktop
A dedicated desktop app for your cards and context.
How it works
How CardGo works, in detail
Everything behind the short version: what goes inside a card, how CardGo keeps it current, and how your cards stay encrypted.
Seven sections,one card.
Profile, Now, Goals, Guidance, Memory, Timeline, Skills. Fill in what’s useful, skip the rest—empty sections save nothing. Pick one below to see what goes in it.
Profile
What is this card about?
Who or what this card is about. The things you would say first if someone asked, and would still be true next quarter.
Stable — changes in months, not days
Profile
- Product design lead at a 20-person startup
- Based in Tokyo (GMT+9)
- Two kids under five
Now
Where do things stand right now?
The present state of this part of your life. Short, current, and overwritten rather than added to — a Now section that only ever grows has quietly become a Timeline.
Replaced as things move
Now
- The auth migration is the current blocker
- Hiring one designer this quarter
Goals
What are you working toward?
What you are working toward, with enough of a horizon that an assistant can plan against it instead of guessing at it.
Closed once you get there
Goals
- Run a half marathon by October
- Ship billing before Q4
Guidance
How should AI help you here?
How you want to be helped here. These are rules rather than facts — the section that changes the shape of an answer instead of its content.
Standing instructions to the AI
Guidance
- Answer in metric units
- Keep briefs under 200 words
- Never propose meetings before 10am
Memory
What’s worth remembering?
The details you are tired of repeating. Small, durable, and worth carrying into every conversation this card joins.
Appended, and never expires
Memory
- My sister’s name is Lan
- Allergic to penicillin
- Prefers async over calls
Timeline
What happened, and when?
What happened and when, so an assistant can reason about the order of things rather than inferring it from the rest of the card.
Append-only, newest last
Timeline
- 2026-06-02 — Moved to Tokyo
- 2026-08-11 — Started marathon training
Skills
What can you ask for here?
Named moves this card supports. Write one once, then call it from the composer with a tap: the prompt goes in, and the rest of the card stays out of the way.
Invoked when you ask — never sent by default
Skills
- Weekly review
- Draft a reply
- Summarize for my manager
- Turn notes into tasks
New in CardGo
Cards that keep up with you.
Keeping a profile current is work, and work is why profiles go stale. So CardGo drafts the cards, surfaces the right one as you type, and files what you say back where it belongs.
Live now
Describe your life once. Get a whole set of cards.
One paragraph in — a named set out, already sorted into sections. You keep the ones that are right.
- /dream-cards
- /create-card
- /update-card
/dream-cards
I lead product design at a startup in Tokyo, I’m training for a half marathon, and I have two kids under five.
- Work
- Health
- Family
3 cards proposed
Suggestions and Capture read only your own draft, and read it on your device — a small model in your browser, not a server. CardGo never reads the conversation, and nothing is attached, saved, or changed until you tap.
Coming soon
More ways to use your cards.
Coming soon
CardGo Keyboard
A mobile keyboard for Android and iOS that brings your cards into any app.
Why CardGo
Better answers, with only the context you choose.
Choose what each chat knows
Attach only the card a conversation needs. Nothing else is shared.
Switch AIs without starting over
One card works in ChatGPT, Claude, Gemini, Perplexity, and Grok.
Encrypted end-to-end
Cards are locked on your device with a key we never receive. We store ciphertext.
Filter sensitive details before sharing
Review the snapshot before you attach a card. Sensitive values are filtered on your device, so you can see exactly what the AI will receive.
Coming soon
Share one card—not your profile
Send a read-only card when it helps. You decide exactly what goes with it.
Privacy by DesignEnd-to-end encrypted
Encrypted before it ever leaves your browser.
Your cards are sealed on your device with a key we never receive. What reaches CardGo is ciphertext — we can sync it, count it, and delete it, but we cannot read it.
What you write
Work
Product design lead · Timezone: Tokyo (GMT+9)
What our servers store
An opaque block of ciphertext.Ciphertext · 412 bytes · rev 7 — and nothing else
Your key is born on your device
The vault key is generated in your browser and never sent to CardGo. No copy, no escrow, no reset.
AES-256-GCM, a key per card
Every card gets its own content key, sealed with the browser’s built-in Web Crypto before it is uploaded.
Our servers hold ciphertext
We sync opaque blobs, sizes, and timestamps. Nobody at CardGo can read a card — there is no key to read it with.
A recovery phrase only you hold
Setup shows a 15-word phrase once and asks you to confirm it. We never store it, so only you can restore a vault.
Encryption protects your cards from us — it cannot protect what you deliberately send to an AI provider. Once you attach a card, that context is governed by that provider’s terms. Read the full privacy policy.
FAQ
Questions people ask before installing
What is an AI context card?
A short, structured block of context you want an AI to have: a Profile, what’s happening Now, Goals, Guidance, Memory, a Timeline and Skills. You write it once in CardGo and attach it to a conversation when it’s relevant — nothing is sent until you do.
Which AI chats does CardGo work with?
ChatGPT, Claude, Gemini, Perplexity and Grok, through the Chrome extension in desktop Chromium browsers such as Chrome, Edge, Brave and Arc. Mobile browsers cannot run extensions.
Does CardGo read my AI conversations?
No. It never reads your chat history or the AI’s replies. The only text the extension looks at is the message box and your own unsent draft, so it can suggest a card — and nothing is attached until you choose it.
What is shared when I attach a card?
Exactly the text you previewed: the card’s sections, added to your message when you press send, inside a visible “CardGo context” marker. Skills are sent only when you invoke one. No other card, no profile. Once sent, that context belongs to your conversation with that provider, under its terms.
Can CardGo read my encrypted cards?
No. Cards are encrypted in your browser with AES-256-GCM, one content key per card, under a vault key generated on your device and never sent to CardGo. Our servers store ciphertext and operational metadata. A 15-word recovery phrase you keep is the only way back into a vault — there is no reset.
Is CardGo a prompt manager or an AI memory tool?
Neither, exactly. Prompt managers store prompts; built-in memory lives inside one provider’s product. CardGo stores context about you and your work — encrypted, portable across five AI chats, and attached one conversation at a time, by you.
Is CardGo free?
Yes. CardGo is free to start, with no credit card. The Free plan includes up to 7 end-to-end encrypted cards that sync across your devices.
Early access
Try CardGo free.
Install the extension, build your first context card, and bring it to your next AI conversation.
Free early access · No credit card