Two-person compatibility quiz. Person A takes it, sends a link to Person B, both see scored results with AI-generated insights when B is done.

• Fixed question set with personality scoring across multiple traits
• Person A submits answers → server returns a session ID + personality summary
• Person B opens the session link, submits answers → server scores compatibility, generates AI insights, and stores everything
• /api/result/:id re-fetches a completed pairing
• Per-IP rate limit (20 starts/joins per hour)
• AI insight generation is best-effort — failures don't block the result

Bun's built-in Bun.serve (no framework), SQLite via lib/db.js, scoring logic in lib/scoring.js, AI calls in lib/ai.js. Static frontend in public/.

bun install
bun run start   # serves on :3500 (PORT env overrides)

• The AI insights feature in lib/ai.js likely expects an LLM API key — check that file for the env var name before deploying with insights enabled.
• SQLite at data/duet.db is runtime data, gitignored.