Alloca

A local-first annual budgeting single-page application built with SvelteKit. No backend, no account, no sync — your data stays in the browser.

What it does

Zero-based budgeting across 12 months. Every month must satisfy:

Income − Expenses − Savings = 0

Each entry is one of three types:

• Monthly recurring — appears in all 12 months, overridable per month
• Single month — one-time event in a specific month
• Annual distributed — yearly amount split evenly across 12 months, overridable per month

The dashboard shows a year summary and a month grid. Clicking a month opens a detail panel with inline-editable entries grouped by category.

Data is persisted automatically to IndexedDB via Dexie. Export and import as JSON.

Stack

• SvelteKit + Svelte 5 (runes mode)
• TypeScript
• TailwindCSS v4
• Dexie (IndexedDB)
• Zod (import validation)
• @sveltejs/adapter-static — pure SPA, no SSR

Requirements

• Node.js 18 or later
• npm

Setup

git clone git@github.com:Trede98/alloca.git alloca
cd alloca
npm install

Running locally

npm run dev

Opens at http://localhost:5173. The app seeds a demo budget on first load if IndexedDB is empty.

Type checking

npm run check

Building for production

npm run build

Output goes to build/. The result is a static site — serve it from any CDN or static host (Netlify, Vercel static, GitHub Pages, nginx, etc.).

Previewing the production build

npm run preview

Serves the build/ folder locally at http://localhost:4173.

Import / Export

Use the Import/Export menu in the app header to:

• Export — downloads the current budget as a JSON file
• Import — replaces the current budget after Zod validation and a confirmation prompt

The JSON format:

{
  "version": 1,
  "exportedAt": "2026-01-01T00:00:00.000Z",
  "budget": { ... }
}

Project structure

src/
  lib/
    budget.ts         # Pure calculation and mutation functions
    db.ts             # Dexie DB + load/save/replace helpers
    types.ts          # TypeScript interfaces
    schemas.ts        # Zod schemas for import validation
    format.ts         # formatCurrency, MONTH_NAMES
    seed.ts           # Demo budget generated on first load
    theme.ts          # Dark/light theme toggle (persisted to localStorage)
    components/
      BudgetDashboard.svelte
      MonthCard.svelte
      EntryList.svelte
      EntryRow.svelte
      EntryDialog.svelte
      SummaryBar.svelte
      ImportExportMenu.svelte
      BalanceBadge.svelte
  routes/
    +layout.ts        # ssr: false
    +layout.svelte
    +page.svelte      # Single route — loads budget, wires autosave