# CLAUDE.md This file provides guidance to Claude Code (claude.ai/code) when working with code in this repository. @AGENTS.md > The import above is load-bearing: this is a **customized Next.js 16** with breaking changes vs. > public docs. Before writing any Next.js code (routing, metadata, `next/image`, `next/font`, > route handlers, config), read the relevant guide under `node_modules/next/dist/docs/01-app/`. ## What this is `temetro` — an open-source AI chat that lets clinicians retrieve patient information in natural language. The product surface is currently **UI-only**: the chat appends a mock assistant reply (`components/chat/chat-panel.tsx`); there is no backend, model call, or patient data yet. ## Commands ```bash npm run dev # Next dev server (Turbopack) on http://localhost:3000 npm run build # production build (runs a full TypeScript typecheck — see caveat below) npm run start # serve the production build npm run lint # eslint (eslint-config-next: core-web-vitals + typescript) ``` There is **no test runner** configured (no `test` script, no vitest/jest/playwright). Don't invent test commands; verify changes by running the dev server. **Version control:** this folder is its own git repo. Commit after every change (`git -C . add -A && git commit`), with the `Co-Authored-By: Claude Opus 4.8 ` trailer. See the root `../CLAUDE.md` for the project-wide per-folder commit policy. ## Architecture - **Stack:** Next.js 16.2.6 (App Router) · React 19 · TypeScript · Tailwind CSS **v4**. Path alias `@/*` → repo root (`tsconfig.json`). `cn()` (clsx + tailwind-merge) lives in `lib/utils.ts`. - **`app/`** — App Router. `app/page.tsx` is the product chat page (sidebar + chat panel); `app/layout.tsx` **forces dark mode** by putting `dark` on `` and loads the fonts. - **`components/ui/`** — shadcn components, but built on **Base UI (`@base-ui/react`), not Radix.** APIs differ: composition uses the `render` prop and `useRender`/`mergeProps`, not `asChild`. Match existing files when adding/editing primitives. Config in `components.json` (style `base-luma`, baseColor `neutral`). - **`components/ai-elements/`** — a large AI-chat primitive library (`PromptInput`, `Conversation`, `Message`, `Suggestion`, etc.) typed against **AI SDK v6** (`ai` package: `UIMessage`, `ChatStatus`, `FileUIPart`). Note: `@ai-sdk/react` (`useChat`) is **not installed** — chat state is managed with local React state. - **`components/sidebar-02/`** — the dashboard sidebar (`SidebarProvider` / `Sidebar` / `SidebarInset` from `components/ui/sidebar.tsx`). `app-sidebar.tsx` holds the nav/teams config. - **`components/chat/`** — the product chat UI. `chat-panel.tsx` owns message state + empty/active layouts; `chat-input.tsx` is a bespoke (non–ai-elements) input matching a specific design. ## Theming Tailwind v4 with `@theme inline` and **oklch CSS variables** in `app/globals.css` (a Linear-inspired dark palette; `--primary` is indigo `#5e6ad2`). The app is dark-only. The radius scale (`rounded-2xl` … `rounded-4xl`) is derived from `--radius`, so those utilities are larger than stock Tailwind. ## Gotchas - `npm run build` currently **fails its typecheck** on a pre-existing error in `components/ai-elements/attachments.tsx` (`openDelay` prop). `npm run dev` (Turbopack) is unaffected because it only compiles the imported route and doesn't typecheck the whole tree. - **`lucide-react@1.17` dropped brand glyphs** (e.g. `Github`, `Discord`) — import them and you get a build error. Use inline SVGs instead. - A sibling **`../landing-page/`** directory is a copy of this app with a marketing landing page (`components/landing/`); it is a separate project, not part of this git repo. - Multiple lockfiles in the tree produce a harmless Turbopack "inferred workspace root" warning.