PropelX

Rocket stage builder by BlueDrop, LLC. Browser-based interactive sandbox that lets a user assemble a multi-stage launch vehicle, specify a payload and destination, and see whether the design can physically reach orbit.

See Product Specification and PLAN.md.

Quickstart

pnpm install
pnpm -r build
pnpm -r test

Requires Node 20+ and pnpm 9+.

Repo layout

packages/engine       @propelx/engine   — pure TS physics engine (M1)
packages/web          @propelx/web      — React SPA (M2+)
packages/proxy        @propelx/proxy    — Together.ai proxy (M11)

Environment variables

Copy .env.example to .env and fill in:

• TOGETHER_AI_API_KEY — server-side only. Never expose via VITE_*.
• TOGETHER_MODEL — optional model override.
• WHITELABEL — white-label owner name (default: BlueDrop, LLC).
• WL_PRODUCT — product name + wordmark color scheme.
• PRODUCT_VERSION — version banner text.

License

© 2026 BlueDrop, LLC. All rights reserved.