diff --git a/.claude-done b/.claude-done
index 3c329694..925daed8 100644
--- a/.claude-done
+++ b/.claude-done
@@ -1,56 +1,36 @@
-# Vault from GitHub — Implementation Summary
+# Bug Fix: Editor Auto-Save
 
-## What was built
+## What was fixed
+The editor was not saving changes to disk. Editing a note and switching tabs or closing the app would lose all changes.
 
-A "Vault from GitHub" feature that lets users create or clone a vault from a GitHub repository, directly from within the Laputa app.
+## Root cause
+No `save_note_content` Tauri command existed, no `onChange` handler on the BlockNote editor, and no save mechanism of any kind for body content (only frontmatter updates were saved).
 
-## Architecture
+## Implementation
 
-### Rust Backend (`src-tauri/src/github.rs`)
-- `github_list_repos` — Paginated GitHub API call to list authenticated user's repos (up to 1000)
-- `github_create_repo` — Creates a new GitHub repo via API with auto_init
-- `clone_repo` — Clones a repo locally using HTTPS + OAuth token injection, configures remote auth
-- Helper functions: `inject_token_into_url`, `configure_remote_auth`
-- All three exposed as Tauri commands in `lib.rs`
+### Backend (Rust)
+- Added `save_note_content()` in `vault.rs` with path validation (parent dir existence, read-only check)
+- Registered the Tauri command in `lib.rs`
+- 5 new Rust tests for save functionality
 
-### Frontend (`src/components/GitHubVaultModal.tsx`)
-- Two-tab modal: "Clone Existing" and "Create New"
-- Clone tab: searchable repo list with Private/Public badges, auto-fill clone path
-- Create tab: repo name, Private/Public toggle, auto-fill clone path
-- Loading and cloning progress states
-- No-token state redirects to Settings
-- Integrated into `App.tsx` via StatusBar vault menu
+### Frontend
+- **`useAutoSave` hook** — 500ms debounced save via Tauri command, with `flush()` for immediate save on tab switch
+- **`Editor.tsx` onChange** — Serializes BlockNote blocks back to markdown, restores wikilinks, reconstructs full file (frontmatter + title + body), passes to auto-save
+- **`suppressChangeRef`** — Prevents false saves during programmatic content swaps (tab switching)
+- **`restoreWikilinksInBlocks()`** — Reverse of `injectWikilinks`, collapses wikilink inline nodes back to `[[target]]` syntax
+- **Shared `walkBlocks()` helper** — Extracted to eliminate code duplication between inject/restore
 
-### Settings Extension
-- Added `github_token` field to Settings (Rust + TypeScript)
-- GitHub Token input field in SettingsPanel
-- Refactored `settings.rs` to use testable internal functions (`get_settings_at`, `save_settings_at`)
+### Mock layer
+- Added `save_note_content` handler in `mock-tauri.ts` for browser testing
 
-### Mock Data (`src/mock-tauri.ts`)
-- 5 realistic mock repos for browser-mode testing
-- Mock handlers for all 3 GitHub commands
+### Tests
+- 12 new frontend tests (6 for useAutoSave, 6 for wikilink restoration)
+- 5 new Rust tests for save_note_content
+- E2E test verifying editor loads and renders correctly
+- All 469 frontend + 174 Rust tests passing
+- Coverage thresholds maintained
 
-## Design Decisions
-
-1. **HTTPS+token auth over SSH**: Simpler for users (no SSH key setup), token injected into remote URL
-2. **Auto-fill clone path**: `~/Vaults/<repo-name>` — sensible default, editable
-3. **Private by default** for new repos — safer default for personal vaults
-4. **No OAuth flow**: GitHub token entered manually in Settings — ships faster, no server dependency
-5. **Extra vaults tracked in state**: Cloned vaults added to vault switcher dynamically (not persisted across sessions yet)
-
-## Test Coverage
-
-- **Frontend**: 80.79% statements, 83.34% lines (threshold: 70%)
-- **Rust**: 86.20% lines (threshold: 85%)
-- 12 GitHubVaultModal component tests
-- 12 Rust github.rs unit tests
-- 9 Rust settings.rs unit tests (refactored for coverage)
-- E2E Playwright verification: vault menu, modal tabs, repo list, search filter, repo selection
-
-## Commits (6 total)
-1. `design: vault-from-github wireframes`
-2. `feat: add Rust backend for GitHub vault operations`
-3. `feat: GitHub vault modal with clone/create flows`
-4. `test: add GitHubVaultModal component tests`
-5. `test: improve Rust test coverage for settings and github modules`
-6. `fix: remove unused GithubRepo import in mock-tauri.ts`
+## Key decisions
+- 500ms debounce balances responsiveness vs disk I/O
+- Flush pending saves on tab switch to prevent data loss
+- Full file reconstruction (frontmatter + title + body) ensures round-trip fidelity
diff --git a/e2e/auto-save.spec.ts b/e2e/auto-save.spec.ts
new file mode 100644
index 00000000..1ba4b724
--- /dev/null
+++ b/e2e/auto-save.spec.ts
@@ -0,0 +1,43 @@
+import { test, expect } from '@playwright/test'
+
+test.use({ baseURL: 'http://localhost:5239' })
+
+test.beforeEach(async ({ page }) => {
+  await page.goto('/')
+  await page.waitForTimeout(2000) // Wait for vault data to load
+})
+
+test('editor loads and renders note content for editing', async ({ page }) => {
+  await page.screenshot({ path: 'test-results/auto-save-01-initial.png', fullPage: true })
+
+  // 1. Click a note in the note list panel
+  const noteList = page.locator('.app__note-list')
+  await expect(noteList).toBeVisible({ timeout: 5000 })
+  const firstNote = noteList.locator('div.cursor-pointer').first()
+  await expect(firstNote).toBeVisible({ timeout: 5000 })
+  await firstNote.click()
+  await page.waitForTimeout(1000)
+
+  // 2. Verify the BlockNote editor is visible with content
+  const editor = page.locator('.bn-editor')
+  await expect(editor).toBeVisible({ timeout: 5000 })
+
+  // Verify the editor is contenteditable (ready for editing)
+  const isEditable = await editor.getAttribute('contenteditable')
+  expect(isEditable).toBe('true')
+
+  await page.screenshot({ path: 'test-results/auto-save-02-note-open.png', fullPage: true })
+
+  // 3. Verify the editor has content (not empty)
+  const editorText = await page.evaluate(() => {
+    const el = document.querySelector('.bn-editor')
+    return el?.textContent ?? ''
+  })
+  expect(editorText.length).toBeGreaterThan(10)
+
+  // 4. Verify tab bar shows the active note
+  const tabBar = page.locator('.editor')
+  await expect(tabBar).toBeVisible()
+
+  await page.screenshot({ path: 'test-results/auto-save-03-editor-ready.png', fullPage: true })
+})
diff --git a/src/App.tsx b/src/App.tsx
index 5239a1f5..b398577f 100644
--- a/src/App.tsx
+++ b/src/App.tsx
@@ -83,7 +83,7 @@ function App() {
 
   const updateTabAndContent = useCallback((path: string, content: string) => {
     vault.updateContent(path, content)
-    notes.setTabs((prev: { entry: { path: string }; content: string }[]) =>
+    notes.setTabs((prev) =>
       prev.map((t) => t.entry.path === path ? { ...t, content } : t)
     )
   }, [vault, notes])
diff --git a/src/components/Editor.tsx b/src/components/Editor.tsx
index 8c18c990..62bf7af0 100644
--- a/src/components/Editor.tsx
+++ b/src/components/Editor.tsx
@@ -290,7 +290,7 @@ export const Editor = memo(function Editor({
     // Convert blocks → markdown, restoring wikilinks first
     const blocks = editor.document
     const restored = restoreWikilinksInBlocks(blocks)
-    const bodyMarkdown = editor.blocksToMarkdownLossy(restored)
+    const bodyMarkdown = editor.blocksToMarkdownLossy(restored as typeof blocks)
 
     // Reconstruct the full file: preserve original frontmatter + title heading
     const [frontmatter] = splitFrontmatter(tab.content)
diff --git a/src/hooks/useAutoSave.test.ts b/src/hooks/useAutoSave.test.ts
index a3f672de..62bfa7d4 100644
--- a/src/hooks/useAutoSave.test.ts
+++ b/src/hooks/useAutoSave.test.ts
@@ -2,7 +2,7 @@ import { describe, it, expect, vi, beforeEach, afterEach } from 'vitest'
 import { renderHook, act } from '@testing-library/react'
 import { useAutoSave } from './useAutoSave'
 
-const mockInvokeFn = vi.fn(() => Promise.resolve(null))
+const mockInvokeFn = vi.fn<(cmd: string, args?: Record<string, unknown>) => Promise<null>>(() => Promise.resolve(null))
 
 vi.mock('@tauri-apps/api/core', () => ({
   invoke: vi.fn(),
@@ -15,11 +15,11 @@ vi.mock('../mock-tauri', () => ({
 }))
 
 describe('useAutoSave', () => {
-  let updateContent: ReturnType<typeof vi.fn>
+  let updateContent: (path: string, content: string) => void
 
   beforeEach(() => {
     vi.useFakeTimers()
-    updateContent = vi.fn()
+    updateContent = vi.fn<(path: string, content: string) => void>()
     mockInvokeFn.mockClear()
   })