Cinq: Amar, Martine, Gio, Alden and Goldie
Five private-beta companions on one engine. Each is one page: add up to 10 photos, ask a question, or both, and get an answer with a point of view.
- Gio (design): See with a designer's eye. The custom GPT's design point of view, addressed to whoever is asking.
- Amar (travel): Travel like it matters. Cinq's travel advisor, named for Amar Lalvani and shaped by his taste and experience.
- Martini (style): Dress like you. A personal style advisor for men's, women's and mixed wardrobes: outfit checks, shopping, packing, dress codes, invest / save / skip.
- Alden (wine, cocktails & spirits): The right drink at the right time Helps you choose what to drink, from a bottle on a wine list to a cocktail at the bar, with sake and beer taken just as seriously. Deep knowledge, no pretense.
- Untangled (clarity): Clear decisions from complexity. Map a tangle of people, incentives, facts and assumptions. Separate signal from noise, control from non-control, labor from fruits. Restore your ability to decide.
The code is shared. Each companion is its own Vercel project with its own address, name, icon and link preview, chosen by one setting: COMPANION=gio, tony, martini, alden or goldie (hub for the Cinq landing page).
Jack has retired. He stays in the code as Jack (jack.ts, jack-prompt.ts) so his old address, still COMPANION=jack, shows a page saying he's no longer one of Cinq's advisors, under his own name and icon. It takes no new questions (the ask route answers 410). Nothing a person asked Jack was ever saved, so there is nothing to move, and nothing presents Jack's link as Alden.
- No saved conversations. A visit is one conversation. Follow-up questions work while the page is open; New or a reload starts fresh.
- Nothing stored. Photos are shrunk in the browser and sent with the question. The app has no database tables of its own and keeps no files.
- Live checks. Gio searches the web for real listings and prices; Amar checks that places are still open and still worth it.
- Invitation only. Each tester gets a login; strangers (and their questions on your Anthropic bill) stay out.
Access
Open by default. Anyone with the address can use the app, with no sign-in. The start screen has a Share button that sends the address by Messages, Mail or WhatsApp. Each visitor can ask 40 questions an hour (QUESTIONS_PER_HOUR), and every question goes on your Anthropic account, so set a monthly spend limit at platform.claude.com → Settings → Limits. The pages are marked not-for-search-engines, but anyone you send the link to can forward it.
Sign-in, if you want it back: set REQUIRE_SIGN_IN=true on a project and redeploy. Then:
- By hand. Supabase → Authentication → Users → Add user, tick Auto Confirm User, and send them their login.
- By link. Also set
INVITE_CODE to something long and hard to guess. The start screen's button becomes Invite, sharing https://<address>/join/<INVITE_CODE>. Whoever opens it enters an email and is in, no password. Ban people in Supabase to remove them; change INVITE_CODE to retire the link.
- Home Screen. On iPhone the Home Screen app keeps its own sign-in, apart from Safari: people who joined by link tap Joined with an invitation? on the sign-in page and paste the link and their email.
On a phone, Share → Add to Home Screen installs the app with its own icon, opening full screen.
When something goes wrong
Testers see plain messages ("Amar isn't available right now", "Gio is busy right now"). The reason (a rejected key, no credit, a missing setting) goes to the server log: Vercel → your project → Logs, filtered to errors.
Privacy
- What leaves the browser. Each question goes to the app on Vercel with the visit's conversation so far: the text, photos at 1280px for the new question, and smaller copies of earlier photos. The app passes it to Anthropic and streams the answer back. When a companion searches the web, the query goes through Anthropic's server-side web search tool.
- What's kept. No conversations. While each answer is written, and briefly afterwards, the answer alone (never the question or photos) is kept in Vercel's Runtime Cache under a random id only that browser tab knows, so a phone that switches apps mid-answer can collect it on return. It expires 15 minutes after its last update, or sooner if Vercel evicts it. Stop leaves only a marker saying the answer was stopped, which expires the same way. Supabase is used only for sign-in.
- No analytics, no telemetry. No tracking scripts or error-reporting service. The npm scripts turn off Next.js build telemetry; set
NEXT_TELEMETRY_DISABLED=1 on Vercel too. Fonts are bundled at build time, so the browser never contacts Google. Leave Vercel Analytics and Speed Insights off.
How it works
Browser ──► Next.js on Vercel ──► Anthropic (claude-opus-5-5, web search)
│
└──► Supabase Auth (sign-in only)
src/components/studio.tsx is the whole interface: the start screen, the conversation and the composer (camera button, optional text, send). A failed answer puts the question and photos back to resend; answers can be copied.src/lib/companions/ holds each companion: its system prompt (gio-prompt.ts, tony-prompt.ts, martini-prompt.ts, alden-prompt.ts, untangled-prompt.ts; jack-prompt.ts for the retired Jack), its capabilities, and the words the page shows (name, tagline, placeholder, status lines). currentCompanion() picks one from COMPANION; ACTIVE_LINEUP is the five on Cinq.src/app/icon.tsx, apple-icon.tsx, opengraph-image.tsx and manifest.ts give each companion its home-screen icon (a letter on each companion's iconTile colour; Alden's claret tile is a placeholder until an approved Alden icon exists) and link preview, drawn at build time with the fonts in assets/fonts (SIL Open Font License).src/lib/ask/photos.ts shrinks photos in the browser. src/lib/ask/budget.ts keeps each request under Vercel's 4.5 MB body limit by dropping the oldest photos from long visits first.src/app/api/ask/route.ts checks the sign-in, validates the request and streams the answer as NDJSON.src/lib/ask/prompt.ts assembles what the model sees, in order: the companion's system prompt, then an app capabilities block (what the app does, that it keeps nothing, that it doesn't know who's asking), then the conversation.src/lib/ai/anthropic.ts streams from Claude with web search, resumes paused search turns, and falls back server-side when a request is refused.
To change how a companion thinks, edit its src/lib/companions/<name>-prompt.ts and redeploy both projects' latest deployment (a merge does this automatically).
Setup
Needs Node 20+.
npm install- Create a Supabase project (or run
npx supabase start locally, which needs Docker).
- In Supabase → Authentication → Users → Add user, create the one login you'll share. Tick Auto Confirm User.
- In Authentication → Sign In / Providers, turn off Allow new users to sign up.
cp .env.example .env.local and fill in the Supabase URL and publishable key and your Anthropic key. Set COMPANION=tony, martini or jack to run another companion.npm run dev and open http://localhost:3000.
The supabase/ folder holds migrations from the earlier, fuller version of Gio. The app no longer reads those tables; an existing project can keep them, and a new one doesn't need them.
Check it
npm test # prompt assembly, the ask route, request budgeting, the Anthropic provider
npm run lint
npm run typecheck
npm run build
scripts/dev/mock-anthropic.mjs is an offline stand-in for the Anthropic API. Run it and set ANTHROPIC_BASE_URL=http://127.0.0.1:4010 to try the app without a key.
Environment variables
Every variable is documented in .env.example.
| Variable | Purpose |
|---|
COMPANION | gio (default), tony, martini, alden, goldie, or hub; jack only on Jack's retired address. Read at build time: redeploy after changing it |
NEXT_PUBLIC_SUPABASE_URL, NEXT_PUBLIC_SUPABASE_PUBLISHABLE_KEY | Sign-in, when it's on. NEXT_PUBLIC_SUPABASE_ANON_KEY also works, as set by the Vercel Supabase integration |
ANTHROPIC_API_KEY | Claude |
CHAT_MODEL | Defaults to claude-opus-5-5 (GIO_CHAT_MODEL also works) |
CHAT_EFFORT | How much the companion thinks before answering. Defaults to high |
WEB_SEARCH_MAX_USES | Web searches allowed per answer. Defaults to Gio 5, Amar 8, Martini 5, Alden 5, Goldie 0; 0 turns search off |
REQUIRE_SIGN_IN | Optional. true requires sign-in; unset, the app is open to anyone with the address |
QUESTIONS_PER_HOUR | Optional. Per-visitor cap, default 40; 0 turns it off |
INVITE_CODE | Optional, with sign-in on. Turns on link invitations (/join/<code>) and the Invite button |
SUPABASE_SERVICE_ROLE_KEY | Needed for link invitations; server-side only. Set by the Vercel Supabase integration (SUPABASE_SECRET_KEY also works) |
NEXT_PUBLIC_ALDEN_URL | Hub only. Alden's address for his card on Cinq. Unset, a preview's card says "Coming soon", and a production hub build stops (src/lib/launch.ts) so the live hub never does |
NEXT_TELEMETRY_DISABLED | Set to 1 |
Deploy to Vercel
- Import this repo into Vercel.
vercel.json pins the framework to Next.js.
- Add the environment variables above, for Production and Preview.
- Deploy, open the URL on your phone, and add it to the home screen.
A second companion is a second Vercel project from the same repo: Add New → Project → import The-Host again, name it (say, tony), and add the same variables plus COMPANION=tony. Connect the same Supabase project (Storage → Connect) so testers keep one login. Every merge to main redeploys both.
Answers stream. The ask route allows up to 300 seconds and ends an answer 20 seconds before that with a message, keeping what was written; lower maxDuration in src/app/api/ask/route.ts if your plan's limit is lower, or raise it (up to your plan's limit) to give long answers more time.
Live prices come from web search, which must be enabled for your Anthropic organization. If a companion never searches, an admin can turn it on in the Claude Console under organization privacy settings.
