# CLAUDE.md

This file provides guidance to Claude Code (claude.ai/code) when working with code in this repository.

## Commands

```bash
# Development
source ~/.nvm/nvm.sh && npm start          # Start Electron app with hot-reload

# Build & Package
source ~/.nvm/nvm.sh && npm run make       # Build distributable packages
source ~/.nvm/nvm.sh && npm run package    # Package without making installers

# Lint
source ~/.nvm/nvm.sh && npm run lint       # ESLint over .ts/.tsx files

# Database migrations (Drizzle)
source ~/.nvm/nvm.sh && npx drizzle-kit generate   # Generate migration from schema changes
source ~/.nvm/nvm.sh && npx drizzle-kit push        # Push schema directly (dev only)
```

There is no test suite currently.

## Architecture Overview

Adiuva is a local-first Electron desktop app. The three Electron processes communicate via a custom tRPC↔IPC bridge (the public `electron-trpc` package is incompatible with tRPC v11, so a custom implementation is used).

### Process Boundaries

```
Renderer (React)  ──ipcLink──►  Preload (contextBridge)  ──IPC──►  Main (tRPC router + SQLite)
```

1. **Main process** (`src/main/`) — Node.js, owns the database and all business logic
   - `index.ts` — Window creation, app lifecycle
   - `ipc.ts` — Custom handler that bridges `ipcMain` to tRPC procedures
   - `router/index.ts` — All tRPC routers (clients, projects, tasks, checkpoints, notes, settings, ai)
   - `db/index.ts` — Drizzle + better-sqlite3, WAL mode, singleton `getDb()`
   - `db/schema.ts` — All table definitions (clients, projects, tasks, checkpoints, notes)
   - `store.ts` — electron-store for persistent UI settings (e.g., `sidebarCollapsed`)

2. **Preload** (`src/preload/trpc.ts`) — Exposes `window.electronTRPC` with `sendMessage()` / `onMessage()`

3. **Renderer** (`src/renderer/`) — React 19, never accesses Node APIs directly
   - `lib/ipcLink.ts` — Custom TRPCLink that routes calls through `window.electronTRPC`
   - `lib/trpc.ts` — `createTRPCReact<AppRouter>()` typed client
   - `index.tsx` — QueryClient + tRPC + Router providers
   - All data access is through `trpc.*.*useQuery()` / `trpc.*.*.useMutation()`

### Routing

File-based routing via TanStack Router. Add a file to `src/renderer/routes/` and the route tree (`src/renderer/routeTree.gen.ts`) is auto-regenerated by the Vite plugin on next `npm start`. Routes:
- `__root.tsx` — Root layout wrapping everything in `AppShell`
- `index.tsx`, `tasks.tsx`, `timeline.tsx`, `projects.tsx`

### Database

Schema lives in `src/main/db/schema.ts`. Migrations are in `src/main/db/migrations/`. The DB is created in Electron's `userData` directory as `adiuva.db`. On startup, `initDb()` runs non-destructive migrations (CREATE TABLE IF NOT EXISTS).

To add a new table or column: edit `schema.ts`, run `drizzle-kit generate`, then `drizzle-kit push` (dev) or commit the migration file.

### Adding a New Feature (end-to-end pattern)

1. **Schema** — Add table/columns to `src/main/db/schema.ts`
2. **Router** — Add a tRPC sub-router in `src/main/router/index.ts`, merge it into `appRouter`
3. **Types** — `AppRouter` is exported from `src/main/router/index.ts` and imported in `src/renderer/lib/trpc.ts` — types flow automatically
4. **UI** — Create components under `src/renderer/components/<feature>/`, use `trpc.*.*useQuery()` for data

### Key Config Notes

- Vite configs use `.mts` extension (not `.ts`) to avoid ESM/CJS conflicts with electron-forge's externalize-deps plugin
- `@/*` path alias resolves to `src/renderer/*` (TypeScript + Vite + shadcn/ui all share this alias)
- shadcn/ui style: **new-york**, base color: **neutral**
- Icons: **lucide-react** throughout — do not introduce other icon libraries
- Tailwind 4 (not 3) — use CSS variable theming via `globals.css`, not `tailwind.config.js`