---
epic: 8
story: 8.10
title: "Installer & Distribution"
status: draft
---

## Epic 8 — Windows App (Rust + iced)
**Goal:** Fast, lightweight native Windows app -- single .exe, no runtime dependencies.

### Story 8.10: Installer & Distribution

As a **Windows user**,
I want professional installation and distribution options,
So that I can install CalcPad through my preferred method with confidence in its authenticity.

**Acceptance Criteria:**

**Given** the release build is complete
**When** the `.msi` installer is generated via WiX
**Then** it installs CalcPad to `%ProgramFiles%\CalcPad\`, creates Start Menu shortcuts, registers the `.calcpad` file association, and sets up the uninstaller

**Given** the installer is built
**When** the `.msi` is signed
**Then** it has a valid Authenticode signature so Windows SmartScreen does not block it

**Given** the user prefers winget
**When** the user runs `winget install calcpad`
**Then** CalcPad is installed from the winget repository using the published manifest

**Given** the user wants a portable version
**When** they download the `.zip` distribution
**Then** the zip contains `calcpad.exe`, `portable.marker`, and a `data/` directory
**And** the user can run it immediately without installation

**Given** the release binary is built
**When** its file size is measured
**Then** the `.exe` is under 15 MB (including the statically linked engine)

**Given** the installer is run
**When** installation completes
**Then** no runtime dependencies are required (no .NET, no MSVC runtime, no WebView2) -- CalcPad runs standalone