A Val Town app for comparing LLM model outputs side-by-side.

• docs/vt.md — Val Town platform docs: hosting, runtime, triggers, standard libraries, project structure
• docs/vt-sqlite.md — Val Town SQLite usage (more up-to-date than vt.md for SQLite)
• docs/zen.md — OpenCode Zen API gateway docs: endpoints, pricing, model access
• docs/models.json — Model metadata: IDs, capabilities, costs, context limits, provider SDKs
• .claude/skills/ai-elements/ — AI Elements component patterns (used as design inspiration, not directly — requires Next.js)

• Runtime: Deno (Val Town serverless)
• Backend: Hono framework
• Frontend: React 18.2.0 via esm.sh + Tailwind via CDN
• Database: Val Town SQLite
• AI Gateway: OpenCode Zen (https://opencode.ai/zen/v1/)
• Auth: Env var password (PROMPTCOMPARE_PASSWORD) with session cookie

• All React files need /** @jsxImportSource https://esm.sh/react@18.2.0 */
• Pin all React deps to 18.2.0 with ?deps=react@18.2.0,react-dom@18.2.0
• Use https://esm.sh for all npm imports
• SQLite: import from https://esm.town/v/std/sqlite/main.ts (val-scoped DB)
• Never use Deno in shared/ code
• Redirects: use new Response(null, { status: 302, headers: { Location: "..." } }) not Response.redirect
• Entry point: export default app.fetch in backend/index.ts