45 lines
1.5 KiB
Markdown
45 lines
1.5 KiB
Markdown
---
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epic: 7
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story: 7.7
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title: "iCloud Sync"
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status: draft
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---
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## Epic 7 — macOS App (Swift/SwiftUI)
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**Goal:** A beautiful, native macOS app that feels like it belongs on the platform.
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### Story 7.7: iCloud Sync
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As a **macOS user** with multiple Apple devices,
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I want my CalcPad settings and sheets to sync via iCloud,
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So that I can access my calculations on any device without manual import/export.
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**Acceptance Criteria:**
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**Given** the user is signed into iCloud on two Macs
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**When** the user changes a CalcPad setting (e.g., angle mode) on Mac A
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**Then** the setting syncs to Mac B via `NSUbiquitousKeyValueStore`
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**And** Mac B reflects the updated setting without restarting
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**Given** the user creates a new sheet on Mac A
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**When** iCloud sync completes
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**Then** the sheet appears in the sidebar on Mac B
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**Given** the user edits a sheet on Mac A while Mac B is offline
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**When** Mac B comes online
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**Then** the changes sync to Mac B and the sheet is updated
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**Given** the user edits different lines of the same sheet on Mac A and Mac B simultaneously
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**When** both devices sync
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**Then** non-overlapping edits are merged successfully
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**And** the final document contains both sets of changes
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**Given** the user edits the same line on Mac A and Mac B simultaneously
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**When** both devices sync
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**Then** a last-write-wins strategy is applied
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**And** no data corruption occurs (one version is chosen cleanly)
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**Given** the user is not signed into iCloud
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**When** the app launches
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**Then** sheets are stored locally only and no sync errors are shown
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