AI agent for bowdenCloud apps
Bring your own AI into my apps. Ask in plain words, and bc‑agent works the app with you: it writes music, flies a spacecraft, traces family trees, plans launches and coaches chemistry.
Optional on every app: each one works fully without it. bc‑agent runs in your browser with your own OpenAI key, so there is nothing to sign up for.
Optional, by design
Every app I build works on its own, exactly as it always has. bc‑agent is an extra for people who already use AI and want to put it to work inside my products.
It is a small button in the bottom corner. Leave it closed and it stays out of the way. Open it, and the app gains an assistant that can see what you see and use the app's own controls: the same edits, moves and buttons you would make yourself.
Where it works
bc‑agent knows each app the way its builder does. It drives the app's own state and controls, so every change shows up in the app as if you had made it, and most can be undone.
Writes and edits notes, creates instrument tracks, sets tempo, key and the harmony lane, runs the app's own commands, and plays. Each change is one undo step.
“Add a syncopated finger-bass line that follows the chords.”
Open MIDI
In Explore mode it flies the ship, inspects any of the 94 objects, sets the date and plans real orbits. In Story mode it is a tutor: hints and explanations, never the answer.
“Put the ship in a low circular orbit around Titan, as low as is safe.”
Open Planet Ari
Searches and focuses records, switches lenses and filters, and opens passages. It traces connections and lineage, with the verses that support each link.
“How is Lot related to Esau?”
Open Genesis
The same explorer over Matthew to Acts, including the Ministry lens and people who share a name, like the seven Marys.
“Trace Paul's journeys in Acts 13–28.”
Open Gospels and Acts
Explains the question, checks your working against the expected answer, and says why an answer was wrong. It coaches with the game's own hints and never submits for you.
“Can you check my working before I submit?”
Open Forge & Co.
Builds a whole plan from one sentence: cards, positions, colours and links. Then it edits, links and moves cards, manages boards and themes, and undoes its own changes.
“Plan a course launch, working backwards from 200 paying students by March.”
Open Strategic Planner
Say what you want to say, to whom and in whose voice. It picks the matching phrases and sends only when you ask. It sees only what you see on screen.
“Tell Mark the real Q3 win is drone delivery. Send it.”
Open Managing Up
Finds your mood among 51, searches its ranked feed by words, price and category, and saves picks to your list. Product pages are yours to open.
“Something cosy for a night in, under $30.”
Open MoodBuying
Answers questions about my projects from the site's own content, takes you to the right page, points at screens and videos, and opens live apps.
“Show me something built with 3D graphics.”
Open bowdencloud.comSee it at work
Each screen is a real conversation on the live apps. The panel lists every step bc‑agent takes, so you can see exactly what it did.
On a computer, bc‑agent docks to the side of the window. Drag its edge to make it wider. On a phone, it slides up from the bottom and stays above the keyboard, even on apps that are wider than the screen.
Swipe the sheet down to close it. Tap the mic to talk instead of typing.
Bring your own key
bc‑agent uses your OpenAI account, not mine. You add an API key once on each app, and the chat calls OpenAI directly from your browser.
There is no bc‑agent server. The chat is a few small files that run in your browser. Nothing sits between you and OpenAI that could keep, read or leak your key or your conversations. There is nothing for me to bill, either: OpenAI charges your account for what you use, and you can see every request in your OpenAI dashboard.
This is called bring your own key (BYOK). It keeps you in control: you choose the model, you set the budget, and you can turn the key off at any time.
Get started
Sign in at platform.openai.com/api-keys and create a key. A project key with a monthly budget is the safest choice. It starts with sk-.
Click the bc‑agent button in the bottom corner, or press Ctrl Shift Y.
Choose Add your API key, paste it, and choose Check key. When it says “Key works”, choose Save.
Type what you want, or tap one of the suggestions. bc‑agent shows each step as it works, then tells you what it did.
User guide
Voice is off until you turn it on in Settings › Voice.
| Keys | What they do |
|---|---|
| Ctrl Shift Y | Open or close the chat |
| Enter | Send. Shift Enter starts a new line |
| Hold Ctrl Space | Talk, when speech to text is on. Ctrl Shift Space also works, and Alt Space on a Mac |
| Esc | Cancel a recording, stop reading aloud, or close the chat |
While you type in the chat, your keys stay in the chat. Space won't start MIDI playing, and Delete won't delete notes.
The default model is gpt-5.4-nano, OpenAI's lowest-cost current tier. It handles everyday requests quickly and costs very little per message. A bigger model, such as gpt-5.4-mini, writes more interesting music, explains in more depth and handles longer plans. Choose Check key in Settings to list every model your key can use. OpenAI bills each message by its length, so long conversations and big models cost more. Your OpenAI usage page shows exactly what you have spent.
| You see | Try |
|---|---|
| OpenAI 401 | The key is wrong or was deleted. Paste it again and choose Check key. |
| OpenAI 429 | The key has hit a rate limit, its budget, or its credit. Wait a moment, or check billing in OpenAI's settings. |
| OpenAI 404 | Your key can't use that model. Choose Check key and pick one from the list. |
| Microphone blocked | Allow the microphone for the site from the icon at the left of the address bar, then try again. |
| A step marked ✕ | That step hit an error, and bc‑agent saw it too. It usually corrects itself in the next step. Choose the step to see the details. |
| MIDI reloads once | bc‑agent connects to MIDI the first time it is needed. Your song is saved first. |
Questions
No. Every app works fully without it. bc‑agent is an optional companion for people who want to use their own AI with my products.
bc‑agent itself is free. OpenAI charges your account for the requests your key makes, at its usual API prices. A budget in OpenAI's settings keeps the total in check.
No. There is no bc‑agent server. Your key and your conversation stay in your browser, and requests go straight from your browser to OpenAI.
Browsers keep each website's storage separate, and there is no server to share it through. That separation is also a protection: one app can't read the key you gave another.
No. bc‑agent uses the OpenAI API, which is billed separately from ChatGPT plans. You need an OpenAI platform account with billing set up, and an API key from it.
Only the app it is open on: your song, the board, the question on screen, and the app's own reference content. In Managing Up it sees only what the player sees. As a tutor in Forge & Co. and Planet Ari's Story mode, it reads the game's teaching notes so it can check your working, and it coaches rather than giving the answers away.
Current versions of Chrome, Edge, Safari and Firefox, on computers and phones. Voice needs a microphone, and the browser asks before using it.
Yes. It is an AI model, so check what matters. Its changes go through each app's own controls, most are one undo step, and every step is listed in the panel so you can see what it did.
Under the hood
bc‑agent is a single script that each of my apps loads from this site. It finds the app it is on, adds the chat in a sealed-off panel, and loads that app's tools only when you first open it. It drives each app through its own state and controls, so undo, autosave and the interface behave exactly as they do for your own edits.
<script src="https://agent.bowdencloud.com/agent.js" data-side="right"></script>It began as a browser extension, and the same tools now run in the page. There is no account, no tracking and no server: just static files and your own key.