ContextCity // one codexierge to guide 'em all
- We built the ContextCity Codex concierge: an Expo mobile experience where Dartagnan guides travelers through city highlights.
Core trick
GPT workers curate social signals into reels, and Remotion renders localized MP4s with synced narration and subtitles per language.
Description
- We built the ContextCity Codex concierge: an Expo mobile experience where Dartagnan guides travelers through city highlights.
- GPT-backed workers curate social signals into reels, Remotion renders localized MP4s, and the app surfaces rationale, itinerary, and concierge cues.
- A “Route to {POI}” card and localized overlay tie reels directly to multi-step actions (plan, book, guide, celebrate).
- The demo showcases Felix in SoHo across French, English, and Spanish, including synchronized narration, subtitles, and concierge voice.
README excerpt
# ContextCity Codex Concierge This repository houses the hackathon build for the **GPT-5 Startup Hackathon NYC**, showcasing "ContextCity: One Codex to guide 'em all". ## What We're Building - **Context-aware city concierge** centered on the Spain vs. France World Cup final in NYC. - Dartagnan the Doodle fronts the experience while GPT-5 Codex curates multi-language social highlight reels, itineraries, and bookings. - Remotion renders localized MP4 reels (FR/EN/ES) with matching narration; Expo consumes them alongside Codex rationale, itinerary map card, and concierge overlay cues. - All work is open source for hackathon verification; no pre-existing code. ## 🎥 Demo Video - Watch the end-to-end concierge flow here: [ContextCity Codex Concierge Demo](https://youtube.com/shorts/XryFMA-IeTg). ## Key Docs - `FEATURE_SOCIAL_FEEDS.md` – full feature spec and hackathon scenario. - `TODO.md` – engineering backlog tuned for the event weekend. - `AGENTS.md` – contributor guide. - `DEMO.md` – 60-second pitch and live demo script. ## Getting Started 1. Clone the repo during the hackathon window. 2. Install dependencies with `yarn install` (JS) and `poetry install` (Python) once code scaffolding lands. 3. Follow `TODO.md` to stand up the concierge MVP. ## Hackathon Notes - Judges: expect live demos, not slides. - Submission: upload a 1-minute demo video with repo link. - All commits should land during the event and reference hackathon tasks. Let's show how Codex can guide every vis