Standing on open-source shoulders.

• React — the UI library the whole interface is built on

• Vite — build tool and dev server
• TypeScript — typed JavaScript across the app
• Tailwind CSS — utility-first styling
• PostCSS — CSS transformation pipeline
• Autoprefixer — automatic vendor prefixes
• ESLint — linting (with typescript-eslint)
• Prettier — code formatting
• Vitest — test runner
• Testing Library — component testing
• jsdom — DOM environment for tests

• FastAPI — web framework for the game API
• Uvicorn — ASGI server
• pytest — backend test framework
• HTTPX — HTTP client used in tests

• Ollama — self-hosted model runtime for Spy Games mission text
• Gemma — Google's open model (gemma3:1b), used under the Gemma Terms of Use

• Cloudflare Pages — static hosting and global CDN for the site
• Cloudflare Tunnel — secure link between the site and the game server
• Docker — containers the game server and model runtime run in

The chess, checkers, reversi, Connect Four, Nine Men's Morris, and cipher engines are original work — Cognivo doesn't depend on a third-party game library. The rules of chess, checkers, reversi, Connect Four and Nine Men's Morris are in the public domain. Spy Games mission messages are drafted by the small open model above, running on Cognivo's own server; the ciphers applied to them are original code.