feat(settings): add read-aloud filename token

Expose media-overlay-aware naming across file creation and delivery paths while preserving existing client contracts. Keep settings router mocks compatible with the application router exports.

Closes #1590

client/src/features/settings/__tests__/FileNamingSettings.spec.ts

@@ -147,6 +147,18 @@ describe('FileNamingSettings', () => {
     }
   })
 
+  it('offers the readaloud token and previews read-aloud and plain EPUB outcomes', async () => {
+    const wrapper = await mountPage()
+
+    expect(buttonWith(wrapper, '{readaloud}')).toBeDefined()
+    await patternField(wrapper).setValue('{title}< ({readaloud})>')
+
+    expect(wrapper.text()).toContain('Read-aloud comparison')
+    expect(wrapper.text()).toContain('Read-aloud EPUB')
+    expect(wrapper.text()).toContain('Plain EPUB')
+    expect(wrapper.text()).toContain('Neuromancer (readaloud)')
+  })
+
   it('saves the cross-platform toggle immediately without a separate save button', async () => {
     const wrapper = await mountPage()
 

client/src/features/settings/__tests__/SettingsNav.spec.ts

@@ -14,10 +14,14 @@ const routeState = { name: 'settings-appearance-theme' }
 
 const push = vi.fn<(to: { name: string }) => void>()
 
-vi.mock('vue-router', () => ({
-  useRoute: () => ({ name: routeState.name }),
-  useRouter: () => ({ push }),
-}))
+vi.mock('vue-router', async (importOriginal) => {
+  const actual = await importOriginal<typeof import('vue-router')>()
+  return {
+    ...actual,
+    useRoute: () => ({ name: routeState.name }),
+    useRouter: () => ({ push }),
+  }
+})
 
 const navStatus = vi.hoisted(() => ({ scanning: false }))
 

client/src/features/settings/__tests__/SettingsSidebar.spec.ts

@@ -10,10 +10,14 @@ const permState = {
   demoRestricted: false,
 }
 
-vi.mock('vue-router', () => ({
-  useRoute: () => ({ name: 'settings-appearance-theme' }),
-  useRouter: () => ({ push: vi.fn<(to: { name: string }) => void>() }),
-}))
+vi.mock('vue-router', async (importOriginal) => {
+  const actual = await importOriginal<typeof import('vue-router')>()
+  return {
+    ...actual,
+    useRoute: () => ({ name: 'settings-appearance-theme' }),
+    useRouter: () => ({ push: vi.fn<(to: { name: string }) => void>() }),
+  }
+})
 
 vi.mock('@/features/auth/composables/usePermissions', () => ({
   usePermissions: () => ({

client/src/features/settings/file-naming/components/NamingResultPanel.vue

@@ -36,6 +36,8 @@ function resolve(metadata: Record<string, string>): string {
 }
 
 const resolved = computed(() => resolve(EXAMPLE_PATTERN_METADATA))
+const usesReadaloudToken = computed(() => props.pattern.includes('{readaloud'))
+const plainEpubResult = computed(() => resolve({ ...EXAMPLE_PATTERN_METADATA, readaloud: '' }))
 
 const fallbackCases = computed(() =>
   MISSING_METADATA_CASES.map((previewCase) => ({
@@ -113,6 +115,22 @@ function handleSanitize(value: boolean) {
       </dl>
     </div>
 
+    <div v-if="usesReadaloudToken" class="border-t border-border px-3.5 py-3">
+      <h4 class="mb-1 text-[10px] font-bold uppercase tracking-wider text-muted-foreground">
+        {{ t('settings.reader.fileNaming.readaloudComparison') }}
+      </h4>
+      <dl class="divide-y divide-dashed divide-border">
+        <div class="py-1.5">
+          <dt class="text-[11px] font-semibold text-muted-foreground">{{ t('settings.reader.fileNaming.readaloudEpub') }}</dt>
+          <dd class="mt-0.5 break-words font-mono text-[11px] text-foreground">{{ resolved }}</dd>
+        </div>
+        <div class="py-1.5">
+          <dt class="text-[11px] font-semibold text-muted-foreground">{{ t('settings.reader.fileNaming.plainEpub') }}</dt>
+          <dd class="mt-0.5 break-words font-mono text-[11px] text-foreground">{{ plainEpubResult }}</dd>
+        </div>
+      </dl>
+    </div>
+
     <div class="flex items-center gap-3 border-t border-border bg-muted/30 px-3.5 py-3">
       <div class="min-w-0 flex-1">
         <p class="settings-label">{{ t('settings.reader.fileNaming.crossPlatform') }}</p>

client/src/features/settings/file-naming/components/PatternTokenPalette.vue

@@ -24,6 +24,7 @@ const TOKEN_DESCRIPTION_KEYS: Record<PatternToken, string> = {
   library: 'settings.reader.fileNaming.tokenLibrary',
   originalFilename: 'settings.reader.fileNaming.tokenOriginalFilename',
   extension: 'settings.reader.fileNaming.tokenExtension',
+  readaloud: 'settings.reader.fileNaming.tokenReadaloud',
 }
 
 const MODIFIER_DESCRIPTION_KEYS: Record<PatternModifier, string> = {

client/src/locales/en.json

@@ -2324,6 +2324,7 @@
         "tokenLibrary": "Library name",
         "tokenOriginalFilename": "Original filename (without extension)",
         "tokenExtension": "File extension (without dot)",
+        "tokenReadaloud": "The word readaloud for an EPUB with media overlays",
         "patternHelpIntro": "Patterns use tokens like {titleToken} and {authorsToken}, plus modifiers and optional segments.",
         "browseTokensAndExamples": "Browse tokens and examples",
         "subtitleShort": "Folder and filename patterns for stored files.",
@@ -2386,6 +2387,9 @@
         "resultCopyFailed": "Failed to copy the resolved result",
         "sampleBookNote": "Sample book used for every preview",
         "missingMetadata": "If metadata is missing",
+        "readaloudComparison": "Read-aloud comparison",
+        "readaloudEpub": "Read-aloud EPUB",
+        "plainEpub": "Plain EPUB",
         "caseNoSeriesLabel": "No series",
         "caseNoYearLabel": "No year",
         "caseNoAuthorLabel": "No author",

packages/types/src/pattern-resolver.ts

@@ -19,6 +19,7 @@ export const EXAMPLE_PATTERN_METADATA: Record<string, string> = {
   library: "Books",
   originalFilename: "neuromancer",
   extension: "epub",
+  readaloud: "readaloud",
 };
 
 export const PATTERN_TOKENS = [
@@ -35,6 +36,7 @@ export const PATTERN_TOKENS = [
   { token: "library", description: "Library name" },
   { token: "originalFilename", description: "Original filename (without extension)" },
   { token: "extension", description: "File extension (without dot)" },
+  { token: "readaloud", description: "The word readaloud for an EPUB with media overlays" },
 ] as const;
 
 export type PatternToken = (typeof PATTERN_TOKENS)[number]["token"];

server/src/common/utils/pattern-tokens.utils.test.ts

@@ -1,6 +1,6 @@
 import { describe, expect, it } from 'vitest';
 
-import { buildPatternTokens } from './pattern-tokens.utils';
+import { buildPatternTokens, patternReferencesToken } from './pattern-tokens.utils';
 
 describe('pattern-tokens.utils', () => {
   describe('buildPatternTokens', () => {
@@ -108,5 +108,25 @@ describe('pattern-tokens.utils', () => {
       expect(legacy['seriesIndex']).toBe('03');
       expect(malformed['seriesIndex']).toBeUndefined();
     });
+
+    it('emits readaloud only for an EPUB with media overlays', () => {
+      expect(buildPatternTokens({ metadata, originalStem: 'book', format: 'epub', mediaOverlayAvailable: true })['readaloud']).toBe('readaloud');
+      expect(buildPatternTokens({ metadata, originalStem: 'book', format: 'EPUB', mediaOverlayAvailable: true })['readaloud']).toBe('readaloud');
+      expect(buildPatternTokens({ metadata, originalStem: 'book', format: 'epub', mediaOverlayAvailable: false })['readaloud']).toBeUndefined();
+      expect(buildPatternTokens({ metadata, originalStem: 'book', format: 'm4b', mediaOverlayAvailable: true })['readaloud']).toBeUndefined();
+    });
+  });
+
+  describe('patternReferencesToken', () => {
+    it('matches a token with or without a modifier', () => {
+      expect(patternReferencesToken('{title}< ({readaloud})>', 'readaloud')).toBe(true);
+      expect(patternReferencesToken('{readaloud:upper}', 'readaloud')).toBe(true);
+    });
+
+    it('does not match a prefix, literal text, or another token', () => {
+      expect(patternReferencesToken('{readaloudEdition}', 'readaloud')).toBe(false);
+      expect(patternReferencesToken('readaloud {title}', 'readaloud')).toBe(false);
+      expect(patternReferencesToken('{title}', 'readaloud')).toBe(false);
+    });
   });
 });

server/src/common/utils/pattern-tokens.utils.ts

@@ -24,6 +24,14 @@ export interface PatternTokenInput {
   originalStem: string;
   format: string;
   libraryName?: string | null;
+  mediaOverlayAvailable?: boolean | null;
+}
+
+export function patternReferencesToken(pattern: string, token: string): boolean {
+  for (const match of pattern.matchAll(/\{([^}:]+)(?::[^}]+)?}/g)) {
+    if (match[1] === token) return true;
+  }
+  return false;
 }
 
 /**
@@ -36,7 +44,7 @@ export interface PatternTokenInput {
  * treats the two identically, and omitting them keeps the map readable in logs.
  */
 export function buildPatternTokens(input: PatternTokenInput): Record<string, string> {
-  const { metadata, authors = [], narrators = [], originalStem, format, libraryName } = input;
+  const { metadata, authors = [], narrators = [], originalStem, format, libraryName, mediaOverlayAvailable } = input;
   const tokens: Record<string, string> = { originalFilename: originalStem, extension: format };
 
   if (libraryName) tokens['library'] = libraryName;
@@ -52,6 +60,7 @@ export function buildPatternTokens(input: PatternTokenInput): Record<string, str
   if (seriesIndex) tokens['seriesIndex'] = seriesIndex;
   if (authors.length > 0) tokens['authors'] = authors.join(', ');
   if (narrators.length > 0) tokens['narrators'] = narrators.join(', ');
+  if (format.toLowerCase() === 'epub' && mediaOverlayAvailable === true) tokens['readaloud'] = 'readaloud';
 
   return tokens;
 }

server/src/common/utils/readaloud-pattern.integration.test.ts

@@ -0,0 +1,161 @@
+import { mkdtemp, mkdir, readdir, rename, rm, writeFile } from 'fs/promises';
+import { tmpdir } from 'os';
+import { basename, dirname, join } from 'path';
+import { ZipArchive } from 'archiver';
+import { afterEach, describe, expect, it } from 'vitest';
+
+import { resolveBookFileTargets } from '../../modules/file-write/book-file-targets';
+import { inspectEpubMediaOverlayFields } from '../../modules/reader/epub/epub-media-overlay-capability';
+
+const CONTAINER_XML = `<?xml version="1.0" encoding="UTF-8"?>
+<container version="1.0" xmlns="urn:oasis:names:tc:opendocument:xmlns:container">
+  <rootfiles><rootfile full-path="EPUB/content.opf" media-type="application/oebps-package+xml"/></rootfiles>
+</container>`;
+
+const CHAPTER_XHTML = `<?xml version="1.0" encoding="UTF-8"?>
+<html xmlns="http://www.w3.org/1999/xhtml"><body><p id="line">Dune</p></body></html>`;
+
+const PLAIN_OPF = `<?xml version="1.0" encoding="UTF-8"?>
+<package xmlns="http://www.idpf.org/2007/opf" version="3.0">
+  <manifest><item id="chapter" href="chapter.xhtml" media-type="application/xhtml+xml"/></manifest>
+  <spine><itemref idref="chapter"/></spine>
+</package>`;
+
+const READALOUD_OPF = `<?xml version="1.0" encoding="UTF-8"?>
+<package xmlns="http://www.idpf.org/2007/opf" version="3.0">
+  <manifest>
+    <item id="chapter" href="chapter.xhtml" media-type="application/xhtml+xml" media-overlay="overlay"/>
+    <item id="overlay" href="chapter.smil" media-type="application/smil+xml"/>
+    <item id="audio" href="audio.mp3" media-type="audio/mpeg"/>
+  </manifest>
+  <spine><itemref idref="chapter"/></spine>
+</package>`;
+
+const CHAPTER_SMIL = `<?xml version="1.0" encoding="UTF-8"?>
+<smil xmlns="http://www.w3.org/ns/SMIL" version="3.0">
+  <body><seq><par><text src="chapter.xhtml#line"/><audio src="audio.mp3" clipBegin="0s" clipEnd="3s"/></par></seq></body>
+</smil>`;
+
+type ZipEntry = { name: string; content: string | Buffer; store?: boolean };
+
+async function writeEpub(path: string, entries: ZipEntry[]): Promise<void> {
+  const archive = new ZipArchive({ zlib: { level: 0 } });
+  const chunks: Buffer[] = [];
+  archive.on('data', (chunk: Buffer) => chunks.push(chunk));
+  const complete = new Promise<void>((resolve, reject) => {
+    archive.on('end', resolve);
+    archive.on('error', reject);
+  });
+  archive.append('application/epub+zip', { name: 'mimetype', store: true });
+  archive.append(CONTAINER_XML, { name: 'META-INF/container.xml' });
+  for (const entry of entries) archive.append(entry.content, { name: entry.name, store: entry.store });
+  await archive.finalize();
+  await complete;
+  await writeFile(path, Buffer.concat(chunks));
+}
+
+describe('readaloud naming integration', () => {
+  let fixtureRoot: string | null = null;
+
+  afterEach(async () => {
+    if (fixtureRoot) await rm(fixtureRoot, { recursive: true, force: true });
+    fixtureRoot = null;
+  });
+
+  it('detects real EPUB media overlays and moves mixed formats to distinct resolved names', async () => {
+    fixtureRoot = await mkdtemp(join(tmpdir(), 'bookorbit-readaloud-pattern-'));
+    const incoming = join(fixtureRoot, 'incoming');
+    const library = join(fixtureRoot, 'library');
+    await Promise.all([mkdir(incoming), mkdir(library)]);
+
+    const plainPath = join(incoming, 'plain.epub');
+    const readaloudPath = join(incoming, 'combined.epub');
+    const audiobookPath = join(incoming, 'audio.m4b');
+    await Promise.all([
+      writeEpub(plainPath, [
+        { name: 'EPUB/content.opf', content: PLAIN_OPF },
+        { name: 'EPUB/chapter.xhtml', content: CHAPTER_XHTML },
+      ]),
+      writeEpub(readaloudPath, [
+        { name: 'EPUB/content.opf', content: READALOUD_OPF },
+        { name: 'EPUB/chapter.xhtml', content: CHAPTER_XHTML },
+        { name: 'EPUB/chapter.smil', content: CHAPTER_SMIL },
+        { name: 'EPUB/audio.mp3', content: Buffer.alloc(32, 1) },
+      ]),
+      writeFile(audiobookPath, Buffer.from('m4b fixture')),
+    ]);
+
+    const [plainCapability, readaloudCapability, audiobookCapability] = await Promise.all([
+      inspectEpubMediaOverlayFields(plainPath, 'epub'),
+      inspectEpubMediaOverlayFields(readaloudPath, 'EPUB'),
+      inspectEpubMediaOverlayFields(audiobookPath, 'm4b'),
+    ]);
+
+    expect(plainCapability.mediaOverlayAvailable).toBe(false);
+    expect(plainCapability.mediaOverlayCheckedAt).toBeInstanceOf(Date);
+    expect(readaloudCapability.mediaOverlayAvailable).toBe(true);
+    expect(readaloudCapability.mediaOverlayDurationSeconds).toBe(3);
+    expect(audiobookCapability.mediaOverlayAvailable).toBe(false);
+    expect(audiobookCapability.mediaOverlayCheckedAt).toBeNull();
+
+    const files = [
+      {
+        id: 1,
+        absolutePath: plainPath,
+        format: 'epub',
+        role: 'content',
+        sortOrder: null,
+        mediaOverlayAvailable: plainCapability.mediaOverlayAvailable,
+      },
+      {
+        id: 2,
+        absolutePath: readaloudPath,
+        format: 'EPUB',
+        role: 'content',
+        sortOrder: null,
+        mediaOverlayAvailable: readaloudCapability.mediaOverlayAvailable,
+      },
+      {
+        id: 3,
+        absolutePath: audiobookPath,
+        format: 'm4b',
+        role: 'content',
+        sortOrder: null,
+        mediaOverlayAvailable: true,
+      },
+    ];
+    const targets = resolveBookFileTargets({
+      primaryFileId: 1,
+      files,
+      metadata: {
+        title: 'Dune',
+        subtitle: null,
+        publisher: null,
+        language: null,
+        isbn13: null,
+        publishedYear: null,
+        seriesName: null,
+        seriesIndex: null,
+      },
+      authors: ['Frank Herbert'],
+      narrators: [],
+      libraryName: 'Books',
+      libraryFolderPath: library,
+      bookFolderPath: incoming,
+      organizationMode: 'book_per_folder',
+      pattern: '{title}/{title}< ({readaloud})>',
+      sanitizeForCrossPlatform: false,
+    });
+
+    for (const file of files) {
+      const target = targets.get(file.id);
+      expect(target).toBeDefined();
+      await mkdir(dirname(target!), { recursive: true });
+      await rename(file.absolutePath, target!);
+    }
+
+    const filenames = (await readdir(join(library, 'Dune'))).sort();
+    expect(filenames).toEqual(['Dune (readaloud).epub', 'Dune.epub', 'Dune.m4b']);
+    expect([...targets.values()].map((target) => basename(target)).sort()).toEqual(filenames);
+  });
+});

server/src/modules/book-dock/book-dock-finalize.service.test.ts

@@ -1197,6 +1197,26 @@ describe('BookDockFinalizeService', () => {
     expect(result[0].newName).toBe('Dune.epub');
   });
 
+  it('previewNames marks a read-aloud EPUB and uses the same destination for finalization', async () => {
+    const { service, repo, db } = makeService();
+    const row = makeRow({ id: 1, targetLibraryId: 10, selectedMetadata: { title: 'Dune' } as BookDockMetadata });
+    const library = { id: 10, name: 'Books', fileNamingPattern: '{title}< ({readaloud})>', organizationMode: 'book_per_file' };
+    repo.findByIds.mockResolvedValue([row]);
+    db.select.mockReturnValue({
+      from: vi.fn().mockReturnValue({
+        where: vi.fn().mockResolvedValue([library]),
+      }),
+    });
+    const inspect = vi.spyOn(service as any, 'inspectMediaOverlayAvailable').mockResolvedValue(true);
+
+    const [preview] = await service.previewNames([1], false, [], undefined, 1, true);
+    const destination = await (service as any).resolveDestination(library, '/library', row, 'epub');
+
+    expect(preview.newName).toBe('Dune (readaloud).epub');
+    expect(destination).toBe('/library/Dune (readaloud).epub');
+    expect(inspect).toHaveBeenCalledTimes(2);
+  });
+
   it('previewNames sanitizes generated names when cross-platform mode is enabled', async () => {
     const { service, repo, appSettings, db } = makeService();
     appSettings.isCrossPlatformPathSanitizationEnabled.mockResolvedValue(true);

server/src/modules/book-dock/book-dock-finalize.service.ts

@@ -48,7 +48,7 @@ import { SeriesMembershipService } from '../../common/services/series-membership
 import { sanitizeLogValue } from '../../common/utils/log-sanitize.utils';
 import { resolveExistingPathSpelling } from '../../common/utils/path-identity.utils';
 import { normalizePublishedDate, publishedYearFromDateKey } from '../../common/utils/published-date.utils';
-import { buildPatternTokens } from '../../common/utils/pattern-tokens.utils';
+import { buildPatternTokens, patternReferencesToken } from '../../common/utils/pattern-tokens.utils';
 import { DB } from '../../db';
 import * as schema from '../../db/schema';
 import { bookMetadata, libraries, libraryFolders } from '../../db/schema';
@@ -60,6 +60,7 @@ import { MetadataScoreService } from '../metadata-score/metadata-score.service';
 import { UploadProcessorService, type UnitBookFileInput, type UnitBookRecords } from '../upload/upload-processor.service';
 import { UploadStorageService } from '../upload/upload-storage.service';
 import { UploadValidatorService } from '../upload/upload-validator.service';
+import { inspectEpubMediaOverlayFields } from '../reader/epub/epub-media-overlay-capability';
 import { BookDockRepository } from './book-dock.repository';
 import { BookDockEventsService, BOOK_DOCK_FILE_INGESTED } from './book-dock-events.service';
 import { BookDockGateway } from './book-dock.gateway';
@@ -1056,15 +1057,17 @@ export class BookDockFinalizeService implements OnModuleInit, OnApplicationBoots
       ? new Map((await this.db.select().from(libraries).where(inArray(libraries.id, libraryIds))).map((lib) => [lib.id, lib]))
       : new Map<number, typeof libraries.$inferSelect>();
 
-    return rows.map((row) => {
-      const format = row.format ?? extname(row.fileName).toLowerCase().slice(1);
-      const effectiveLibraryId = row.targetLibraryId ?? defaultLibraryId ?? null;
-      const lib = effectiveLibraryId !== null ? libraryMap.get(effectiveLibraryId) : undefined;
-      const pattern = lib?.fileNamingPattern ?? (lib?.organizationMode === 'book_per_folder' ? appPatternFolder : appPatternFile);
-      const newName = this.resolveRelativeDestination(lib, row, format, pattern, sanitizeForCrossPlatform);
+    return Promise.all(
+      rows.map(async (row) => {
+        const format = row.format ?? extname(row.fileName).toLowerCase().slice(1);
+        const effectiveLibraryId = row.targetLibraryId ?? defaultLibraryId ?? null;
+        const lib = effectiveLibraryId !== null ? libraryMap.get(effectiveLibraryId) : undefined;
+        const pattern = lib?.fileNamingPattern ?? (lib?.organizationMode === 'book_per_folder' ? appPatternFolder : appPatternFile);
+        const newName = await this.resolveRelativeDestination(lib, row, format, pattern, sanitizeForCrossPlatform);
 
-      return { fileId: row.id, fileName: row.fileName, newName };
-    });
+        return { fileId: row.id, fileName: row.fileName, newName };
+      }),
+    );
   }
 
   private async resolveDestination(library: NamingLibrary, folderPath: string, row: BookDockFileRow, format: string): Promise<string> {
@@ -1075,7 +1078,7 @@ export class BookDockFinalizeService implements OnModuleInit, OnApplicationBoots
         : await this.appSettings.getUploadPattern());
     const sanitizeForCrossPlatform = await this.appSettings.isCrossPlatformPathSanitizationEnabled();
 
-    return join(folderPath, this.resolveRelativeDestination(library, row, format, pattern, sanitizeForCrossPlatform));
+    return join(folderPath, await this.resolveRelativeDestination(library, row, format, pattern, sanitizeForCrossPlatform));
   }
 
   /**
@@ -1086,16 +1089,19 @@ export class BookDockFinalizeService implements OnModuleInit, OnApplicationBoots
    * services; `book_per_file` differs only in that the file itself is the book, so without a
    * pattern it stays where it is instead of gaining a folder of its own.
    */
-  private resolveRelativeDestination(
+  private async resolveRelativeDestination(
     library: NamingLibrary | undefined,
     row: BookDockFileRow,
     format: string,
     pattern: string | null,
     sanitizeForCrossPlatform: boolean,
-  ): string {
+  ): Promise<string> {
     if (pattern) {
       const meta = row.selectedMetadata ?? row.embeddedMetadata ?? {};
-      const tokens = this.buildFilePatternTokens(meta, row.fileName, format, library?.name);
+      const mediaOverlayAvailable = patternReferencesToken(pattern, 'readaloud')
+        ? await this.inspectMediaOverlayAvailable(row.absolutePath, format)
+        : false;
+      const tokens = this.buildFilePatternTokens(meta, row.fileName, format, library?.name, mediaOverlayAvailable);
       const resolved = resolveUploadPath(pattern, tokens, format, { sanitizeForCrossPlatform });
       if (resolved) return resolved;
     }
@@ -1107,7 +1113,13 @@ export class BookDockFinalizeService implements OnModuleInit, OnApplicationBoots
     return row.fileName;
   }
 
-  private buildFilePatternTokens(meta: BookDockMetadata, fileName: string, format: string, libraryName?: string | null): Record<string, string> {
+  private buildFilePatternTokens(
+    meta: BookDockMetadata,
+    fileName: string,
+    format: string,
+    libraryName?: string | null,
+    mediaOverlayAvailable = false,
+  ): Record<string, string> {
     return buildPatternTokens({
       metadata: meta,
       authors: meta.authors,
@@ -1115,9 +1127,21 @@ export class BookDockFinalizeService implements OnModuleInit, OnApplicationBoots
       originalStem: basename(fileName, extname(fileName)),
       format,
       libraryName,
+      mediaOverlayAvailable,
     });
   }
 
+  private async inspectMediaOverlayAvailable(absolutePath: string, format: string): Promise<boolean> {
+    const startedAt = Date.now();
+    const fields = await inspectEpubMediaOverlayFields(absolutePath, format, (err) => {
+      const error = err instanceof Error ? err : new Error(String(err));
+      this.logger.warn(
+        `[book_dock.media_overlay_capability] [fail] path="${sanitizeLogValue(absolutePath)}" durationMs=${Date.now() - startedAt} errorClass=${error.constructor.name} error="${sanitizeLogValue(error.message)}" - EPUB media-overlay inspection failed`,
+      );
+    });
+    return fields.mediaOverlayAvailable;
+  }
+
   /**
    * The staged cover was read from the unit's primary file, so it fills only that file's medium on
    * the book that owns it. The other books of a loose-file unit get their own art from reconcile.

server/src/modules/book-move/book-move-planner.service.ts

@@ -220,6 +220,7 @@ export class BookMovePlannerService {
       originalStem,
       format,
       libraryName: input.target.libraryName,
+      mediaOverlayAvailable: file.mediaOverlayAvailable,
     });
     return resolveUploadPath(input.pattern!, tokens, format, { sanitizeForCrossPlatform: input.sanitizeForCrossPlatform });
   }

server/src/modules/book-move/book-move.repository.ts

@@ -32,6 +32,7 @@ export interface MoveBookFile {
   format: string | null;
   fileHash: string | null;
   sortOrder: number | null;
+  mediaOverlayAvailable: boolean;
 }
 
 export interface MoveBookData {
@@ -161,6 +162,7 @@ export class BookMoveRepository {
           format: bookFiles.format,
           fileHash: bookFiles.fileHash,
           sortOrder: bookFiles.sortOrder,
+          mediaOverlayAvailable: bookFiles.mediaOverlayAvailable,
         })
         .from(bookFiles)
         .where(inArray(bookFiles.bookId, batchIds))
@@ -192,6 +194,7 @@ export class BookMoveRepository {
           format: file.format,
           fileHash: file.fileHash,
           sortOrder: file.sortOrder,
+          mediaOverlayAvailable: file.mediaOverlayAvailable,
         };
         if (list) list.push(entry);
         else filesByBook.set(file.bookId, [entry]);

server/src/modules/book/book.controller.ts

@@ -439,9 +439,14 @@ export class BookController {
     const startedAt = Date.now();
     this.logger.log(`[${event}] [start] fileId=${fileId} userId=${user.id} - download file started`);
     try {
-      const { path, size, format, bookId } = await this.bookService.getFileInfo(fileId, user);
+      const { path, size, format, bookId, mediaOverlayAvailable } = await this.bookService.getFileInfo(fileId, user);
       const mimeType = resolveBookMimeType(format);
-      const filename = await this.bookService.resolveDownloadFilename({ bookId, absolutePath: path, format: format === 'unknown' ? null : format });
+      const filename = await this.bookService.resolveDownloadFilename({
+        bookId,
+        absolutePath: path,
+        format: format === 'unknown' ? null : format,
+        mediaOverlayAvailable,
+      });
 
       reply.header('Accept-Ranges', 'bytes');
       reply.header('Content-Disposition', contentDispositionHeader('attachment', filename, 'download'));

server/src/modules/book/book.repository.ts

@@ -2055,10 +2055,16 @@ export class BookRepository {
 
   async findPrimaryFilesByBookIds(
     bookIds: number[],
-  ): Promise<{ bookId: number; absolutePath: string; format: string | null; sizeBytes: number | null }[]> {
+  ): Promise<{ bookId: number; absolutePath: string; format: string | null; sizeBytes: number | null; mediaOverlayAvailable: boolean }[]> {
     if (bookIds.length === 0) return [];
     return this.db
-      .select({ bookId: books.id, absolutePath: bookFiles.absolutePath, format: bookFiles.format, sizeBytes: bookFiles.sizeBytes })
+      .select({
+        bookId: books.id,
+        absolutePath: bookFiles.absolutePath,
+        format: bookFiles.format,
+        sizeBytes: bookFiles.sizeBytes,
+        mediaOverlayAvailable: bookFiles.mediaOverlayAvailable,
+      })
       .from(books)
       .innerJoin(bookFiles, eq(bookFiles.id, books.primaryFileId))
       .where(inArray(books.id, bookIds))
@@ -2084,9 +2090,16 @@ export class BookRepository {
       .orderBy(asc(books.id));
   }
 
-  async findAllFilesByBookIds(
-    bookIds: number[],
-  ): Promise<{ bookId: number; absolutePath: string; format: string | null; sizeBytes: number | null; sortOrder: number }[]> {
+  async findAllFilesByBookIds(bookIds: number[]): Promise<
+    {
+      bookId: number;
+      absolutePath: string;
+      format: string | null;
+      sizeBytes: number | null;
+      sortOrder: number;
+      mediaOverlayAvailable: boolean;
+    }[]
+  > {
     if (bookIds.length === 0) return [];
     return this.db
       .select({
@@ -2095,6 +2108,7 @@ export class BookRepository {
         format: bookFiles.format,
         sizeBytes: bookFiles.sizeBytes,
         sortOrder: bookFiles.sortOrder,
+        mediaOverlayAvailable: bookFiles.mediaOverlayAvailable,
       })
       .from(bookFiles)
       .where(inArray(bookFiles.bookId, bookIds))

server/src/modules/book/book.service.test.ts

@@ -449,6 +449,29 @@ describe('BookService', () => {
 
       expect(filename).toBe('Dune.pdf.epub');
     });
+
+    it('adds the readaloud marker only to a media-overlay EPUB', async () => {
+      const { service, appSettings, bookRepo } = makeService();
+      appSettings.getDownloadPattern.mockResolvedValue('{title}< ({readaloud})>');
+      bookRepo.findPatternMetadataByBookIds.mockResolvedValue([metaRow(10, { title: 'Dune' })]);
+
+      await expect(
+        service.resolveDownloadFilename({
+          bookId: 10,
+          absolutePath: '/books/read-along.epub',
+          format: 'epub',
+          mediaOverlayAvailable: true,
+        }),
+      ).resolves.toBe('Dune (readaloud).epub');
+      await expect(
+        service.resolveDownloadFilename({
+          bookId: 10,
+          absolutePath: '/books/plain.epub',
+          format: 'epub',
+          mediaOverlayAvailable: false,
+        }),
+      ).resolves.toBe('Dune.epub');
+    });
   });
 
   describe('export files', () => {
@@ -501,6 +524,29 @@ describe('BookService', () => {
       expect(plan.archiveFilename).toBe('Frank Herbert - Dune.zip');
     });
 
+    it('keeps the readaloud marker on an EPUB inside an export but not on the ZIP archive', async () => {
+      const { service, appSettings, bookRepo } = makeService();
+      const user = makeUser();
+
+      appSettings.getDownloadPattern.mockResolvedValue('{title}< ({readaloud})>');
+      bookRepo.findLibraryIdsByBookIds.mockResolvedValue([{ id: 1, libraryId: 77 }]);
+      bookRepo.findPrimaryFilesByBookIds.mockResolvedValue([
+        {
+          bookId: 1,
+          absolutePath: '/books/read-aloud.epub',
+          format: 'epub',
+          sizeBytes: 100,
+          mediaOverlayAvailable: true,
+        },
+      ]);
+      bookRepo.findPatternMetadataByBookIds.mockResolvedValue([metaRow(1, { title: 'Dune' })]);
+
+      const plan = await service.getExportFiles([1], user, 'primary');
+
+      expect(plan.archiveFilename).toBe('Dune.zip');
+      expect(plan.files).toEqual([{ absolutePath: '/books/read-aloud.epub', zipPath: 'Dune (readaloud).epub', sizeBytes: 100 }]);
+    });
+
     it('uses the book title as originalFilename for single-book audiobook archive filenames', async () => {
       const { service, appSettings, bookRepo } = makeService();
       const user = makeUser();

server/src/modules/book/book.service.ts

@@ -182,6 +182,7 @@ type ExportCandidateFile = {
   format: string | null;
   sizeBytes: number | null;
   sortOrder?: number;
+  mediaOverlayAvailable: boolean;
 };
 
 export type ExportPlan = {
@@ -1371,7 +1372,7 @@ export class BookService {
     const fallback = this.sanitizeFilenameSegment(`${originalStem}.zip`, 'book.zip');
     const meta = metadataByBookId.get(firstFile.bookId);
     const tokens = {
-      ...this.buildDownloadPatternTokens(firstFile.absolutePath, firstFile.format, meta),
+      ...this.buildDownloadPatternTokens(firstFile.absolutePath, firstFile.format, false, meta),
       originalFilename: meta?.title?.trim() || originalStem,
       extension: 'zip',
     };
@@ -1389,6 +1390,7 @@ export class BookService {
   private buildDownloadPatternTokens(
     absolutePath: string,
     format: string | null,
+    mediaOverlayAvailable: boolean,
     meta?: Awaited<ReturnType<BookRepository['findPatternMetadataByBookIds']>>[number],
   ): Record<string, string> {
     const pathExtension = extname(absolutePath).toLowerCase().slice(1);
@@ -1402,17 +1404,23 @@ export class BookService {
       originalStem: stem,
       format: extension,
       libraryName: meta?.libraryName,
+      mediaOverlayAvailable,
     });
   }
 
-  private async resolveDownloadFilenameForFile(file: { bookId: number; absolutePath: string; format: string | null }): Promise<string> {
+  private async resolveDownloadFilenameForFile(file: {
+    bookId: number;
+    absolutePath: string;
+    format: string | null;
+    mediaOverlayAvailable: boolean;
+  }): Promise<string> {
     const originalFilename = basename(file.absolutePath);
     try {
       const [pattern, metaRows] = await Promise.all([
         this.appSettings.getDownloadPattern(),
         this.bookRepo.findPatternMetadataByBookIds([file.bookId]),
       ]);
-      const tokens = this.buildDownloadPatternTokens(file.absolutePath, file.format, metaRows[0]);
+      const tokens = this.buildDownloadPatternTokens(file.absolutePath, file.format, file.mediaOverlayAvailable, metaRows[0]);
       const resolvedPath = resolveUploadPath(pattern || DEFAULT_DOWNLOAD_PATTERN, tokens, tokens.extension);
       const resolvedName = resolvedPath?.split('/').filter(Boolean).pop() ?? null;
       return this.sanitizeFilenameSegment(resolvedName ?? originalFilename, originalFilename);
@@ -1430,7 +1438,7 @@ export class BookService {
   async getFileInfo(
     fileId: number,
     user: RequestUser,
-  ): Promise<{ path: string; size: number; format: string; bookId: number; originalFilename: string }> {
+  ): Promise<{ path: string; size: number; format: string; bookId: number; originalFilename: string; mediaOverlayAvailable: boolean }> {
     const file = await this.verifyFileAccess(fileId, user);
     let size: number;
     try {
@@ -1442,10 +1450,22 @@ export class BookService {
       throw err;
     }
     const originalFilename = basename(file.absolutePath);
-    return { path: file.absolutePath, size, format: file.format ?? 'unknown', bookId: file.bookId, originalFilename };
+    return {
+      path: file.absolutePath,
+      size,
+      format: file.format ?? 'unknown',
+      bookId: file.bookId,
+      originalFilename,
+      mediaOverlayAvailable: file.mediaOverlayAvailable,
+    };
   }
 
-  async resolveDownloadFilename(file: { bookId: number; absolutePath: string; format: string | null }): Promise<string> {
+  async resolveDownloadFilename(file: {
+    bookId: number;
+    absolutePath: string;
+    format: string | null;
+    mediaOverlayAvailable: boolean;
+  }): Promise<string> {
     return this.resolveDownloadFilenameForFile(file);
   }
 
@@ -3179,7 +3199,7 @@ export class BookService {
           throw new BadRequestException(`Export exceeds projected size limit of ${EXPORT_LIMITS.MAX_PROJECTED_BYTES} bytes.`);
         }
 
-        const tokens = this.buildDownloadPatternTokens(file.absolutePath, file.format, metadataByBookId.get(file.bookId));
+        const tokens = this.buildDownloadPatternTokens(file.absolutePath, file.format, file.mediaOverlayAvailable, metadataByBookId.get(file.bookId));
         const resolvedPath = resolveUploadPath(pattern || DEFAULT_DOWNLOAD_PATTERN, tokens, tokens.extension);
         const fallbackFilename = basename(file.absolutePath);
         const rawZipPath = resolvedPath ?? fallbackFilename;

server/src/modules/file-write/book-file-targets.test.ts

@@ -63,6 +63,66 @@ describe('resolveBookFileTargets', () => {
     });
   });
 
+  describe('read-aloud EPUBs', () => {
+    it('separates a plain EPUB, read-aloud EPUB, and audiobook using the file-specific token', () => {
+      const files: TargetBookFile[] = [
+        {
+          id: 1,
+          absolutePath: '/library/old/plain.epub',
+          format: 'epub',
+          role: 'content',
+          sortOrder: null,
+          mediaOverlayAvailable: false,
+        },
+        {
+          id: 2,
+          absolutePath: '/library/old/read-aloud.epub',
+          format: 'epub',
+          role: 'content',
+          sortOrder: null,
+          mediaOverlayAvailable: true,
+        },
+        {
+          id: 3,
+          absolutePath: '/library/old/audio.m4b',
+          format: 'm4b',
+          role: 'content',
+          sortOrder: null,
+          mediaOverlayAvailable: false,
+        },
+      ];
+
+      const targets = resolveBookFileTargets(
+        input({
+          files,
+          bookFolderPath: '/library/old',
+          organizationMode: 'book_per_folder',
+          pattern: '{title}/{title}< ({readaloud})>',
+        }),
+      );
+
+      expect(targets.get(1)).toBe('/library/Book/Book.epub');
+      expect(targets.get(2)).toBe('/library/Book/Book (readaloud).epub');
+      expect(targets.get(3)).toBe('/library/Book/Book.m4b');
+      expect(new Set(targets.values()).size).toBe(3);
+    });
+
+    it('does not trust the overlay flag on a non-EPUB file', () => {
+      const files: TargetBookFile[] = [
+        {
+          id: 1,
+          absolutePath: '/library/old/book.m4b',
+          format: 'm4b',
+          role: 'content',
+          sortOrder: null,
+          mediaOverlayAvailable: true,
+        },
+      ];
+
+      expect(resolvePrimaryFileTarget(input({ files, pattern: '{title}< ({readaloud})>' }))).toBe('/library/Book.m4b');
+    });
+  });
+
   /**
    * The bug this module exists for. Every part of an audiobook shares its metadata, so the pattern
    * resolves all of them onto one filename and the track suffix has to come back. A preview that

server/src/modules/file-write/book-file-targets.ts

@@ -10,6 +10,7 @@ export interface TargetBookFile {
   format: string | null;
   role: string | null;
   sortOrder: number | null;
+  mediaOverlayAvailable?: boolean | null;
 }
 
 export interface BookFileTargetsInput {
@@ -141,6 +142,7 @@ function resolveRelPathFor(file: TargetBookFile, input: BookFileTargetsInput): s
     originalStem: basename(file.absolutePath, extension),
     format,
     libraryName: input.libraryName,
+    mediaOverlayAvailable: file.mediaOverlayAvailable,
   });
   return resolveUploadPath(input.pattern, tokens, format, { sanitizeForCrossPlatform: input.sanitizeForCrossPlatform });
 }

server/src/modules/file-write/bulk-rename.repository.ts

@@ -106,6 +106,7 @@ export class BulkRenameRepository {
           format: bookFiles.format,
           role: bookFiles.role,
           sortOrder: bookFiles.sortOrder,
+          mediaOverlayAvailable: bookFiles.mediaOverlayAvailable,
         })
         .from(bookFiles)
         .where(inArray(bookFiles.bookId, libraryBookIds))
@@ -120,6 +121,7 @@ export class BulkRenameRepository {
         format: row.format,
         role: row.role,
         sortOrder: row.sortOrder,
+        mediaOverlayAvailable: row.mediaOverlayAvailable,
       };
       const existing = filesByBook.get(row.bookId);
       if (existing) existing.push(entry);

server/src/modules/file-write/file-rename.repository.test.ts

@@ -18,6 +18,7 @@ describe('FileRenameRepository', () => {
       relPath: 'old-folder/Old Title.epub',
       format: 'epub',
       role: 'primary',
+      mediaOverlayAvailable: true,
       libraryFolderId: 20,
       libraryFolderPath: '/library',
       libraryId: 30,
@@ -66,6 +67,7 @@ describe('FileRenameRepository', () => {
         relPath: 'old-folder/Old Title.epub',
         format: 'epub',
         role: 'primary',
+        mediaOverlayAvailable: true,
       },
       libraryId: 30,
       libraryFolderId: 20,

server/src/modules/file-write/file-rename.repository.ts

@@ -15,6 +15,7 @@ export interface BookRenameData {
     relPath: string | null;
     format: string | null;
     role: string;
+    mediaOverlayAvailable: boolean;
   };
   libraryId: number;
   libraryName: string;
@@ -56,6 +57,7 @@ export class FileRenameRepository {
         relPath: bookFiles.relPath,
         format: bookFiles.format,
         role: bookFiles.role,
+        mediaOverlayAvailable: bookFiles.mediaOverlayAvailable,
         libraryFolderId: bookFiles.libraryFolderId,
         libraryFolderPath: libraryFolders.path,
         libraryId: books.libraryId,
@@ -104,6 +106,7 @@ export class FileRenameRepository {
         relPath: row.relPath,
         format: row.format,
         role: row.role,
+        mediaOverlayAvailable: row.mediaOverlayAvailable,
       },
       libraryId: row.libraryId,
       libraryName: row.libraryName,
@@ -137,6 +140,7 @@ export class FileRenameRepository {
         role: bookFiles.role,
         format: bookFiles.format,
         sortOrder: bookFiles.sortOrder,
+        mediaOverlayAvailable: bookFiles.mediaOverlayAvailable,
       })
       .from(bookFiles)
       .where(eq(bookFiles.bookId, bookId))

server/src/modules/file-write/file-rename.service.ts

@@ -123,6 +123,7 @@ export class FileRenameService implements OnModuleDestroy {
       originalStem,
       format,
       libraryName: data.libraryName,
+      mediaOverlayAvailable: data.file.mediaOverlayAvailable,
     });
     const sanitizeForCrossPlatform = await this.appSettings.isCrossPlatformPathSanitizationEnabled();
     const resolvedRelPath = resolveUploadPath(pattern, tokens, format, { sanitizeForCrossPlatform });

server/src/modules/koreader/koreader-catalog.service.ts

@@ -528,6 +528,7 @@ export class KoreaderCatalogService {
       bookId: file.bookId,
       absolutePath: file.absolutePath,
       format: file.format,
+      mediaOverlayAvailable: false,
     });
 
     try {

server/src/modules/opds/opds.controller.ts

@@ -299,6 +299,7 @@ export class OpdsController {
         bookId,
         absolutePath,
         format: format === 'unknown' ? null : format,
+        mediaOverlayAvailable: false,
       });
 
       reply.header('Content-Disposition', contentDispositionHeader('attachment', filename, 'download'));

server/src/modules/upload/upload.service.test.ts

@@ -213,6 +213,62 @@ describe('UploadService', () => {
     expect(processor.processNewBookImportAsync).toHaveBeenCalledWith(99, 1, '/library/Frank Herbert/Dune.epub', 'epub');
   });
 
+  it('inspects and marks a read-aloud EPUB when the upload pattern references the token', async () => {
+    db.select
+      .mockReturnValueOnce(selectChain([{ id: 1, allowedFormats: ['epub'], fileNamingPattern: '{title}< ({readaloud})>' }]))
+      .mockReturnValueOnce(selectChain([{ id: 2, libraryId: 1, path: '/library' }]));
+    mockExtractEpubMetadata.mockResolvedValue({
+      title: 'Dune',
+      subtitle: null,
+      publisher: null,
+      publishedYear: null,
+      language: null,
+      seriesName: null,
+      seriesIndex: null,
+      isbn13: null,
+      authors: [{ name: 'Frank Herbert' }],
+      tags: [],
+      description: null,
+      isbn10: null,
+    });
+    const inspect = vi.spyOn(service as any, 'inspectMediaOverlayFields').mockResolvedValue({
+      mediaOverlayAvailable: true,
+      mediaOverlayDurationSeconds: 3600,
+      mediaOverlayCheckedAt: new Date(),
+    });
+
+    const result = await service.upload(1, 2, 'raw.epub', {} as any, user);
+
+    expect(result.filename).toBe('Dune (readaloud).epub');
+    expect(storage.moveToPath).toHaveBeenCalledWith('/tmp/upload.bin', '/library/Dune (readaloud).epub');
+    expect(inspect).toHaveBeenCalledOnce();
+  });
+
+  it('does not inspect media overlays for naming when the upload pattern omits the token', async () => {
+    db.select
+      .mockReturnValueOnce(selectChain([{ id: 1, allowedFormats: ['epub'], fileNamingPattern: '{title}' }]))
+      .mockReturnValueOnce(selectChain([{ id: 2, libraryId: 1, path: '/library' }]));
+    mockExtractEpubMetadata.mockResolvedValue({
+      title: 'Dune',
+      subtitle: null,
+      publisher: null,
+      publishedYear: null,
+      language: null,
+      seriesName: null,
+      seriesIndex: null,
+      isbn13: null,
+      authors: [{ name: 'Frank Herbert' }],
+      tags: [],
+      description: null,
+      isbn10: null,
+    });
+    const inspect = vi.spyOn(service as any, 'inspectMediaOverlayFields');
+
+    await service.upload(1, 2, 'raw.epub', {} as any, user);
+
+    expect(inspect).not.toHaveBeenCalled();
+  });
+
   it('stores the directory-entry spelling when an upload targets a case-insensitive parent path', async () => {
     db.select
       .mockReturnValueOnce(selectChain([{ id: 1, allowedFormats: ['epub'], fileNamingPattern: '{authors:first}/{title}.{extension}' }]))

server/src/modules/upload/upload.service.ts

@@ -6,7 +6,7 @@ import { Readable } from 'stream';
 import { and, asc, eq } from 'drizzle-orm';
 import { NodePgDatabase } from 'drizzle-orm/node-postgres';
 import { sanitizeLogValue } from '../../common/utils/log-sanitize.utils';
-import { buildPatternTokens } from '../../common/utils/pattern-tokens.utils';
+import { buildPatternTokens, patternReferencesToken } from '../../common/utils/pattern-tokens.utils';
 import { selectPrimaryFileKeepingCurrent } from '../../common/utils/primary-file-selection.utils';
 
 import { DB } from '../../db';
@@ -417,7 +417,10 @@ export class UploadService {
 
     if (pattern) {
       const stem = basename(filename, extname(filename));
-      const tokens = await this.buildUploadPatternTokens(tempPath, format, stem, library.name);
+      const mediaOverlayAvailable = patternReferencesToken(pattern, 'readaloud')
+        ? (await this.inspectMediaOverlayFields(tempPath, format)).mediaOverlayAvailable
+        : false;
+      const tokens = await this.buildUploadPatternTokens(tempPath, format, stem, library.name, mediaOverlayAvailable);
       const resolved = resolveUploadPath(pattern, tokens, format, { sanitizeForCrossPlatform });
 
       if (resolved) {
@@ -441,8 +444,9 @@ export class UploadService {
     format: string,
     stem: string,
     libraryName?: string | null,
+    mediaOverlayAvailable = false,
   ): Promise<Record<string, string>> {
-    const fallback = buildPatternTokens({ metadata: {}, originalStem: stem, format, libraryName });
+    const fallback = buildPatternTokens({ metadata: {}, originalStem: stem, format, libraryName, mediaOverlayAvailable });
     const event = 'upload.pattern_tokens';
     const startedAt = Date.now();
 
@@ -506,6 +510,7 @@ export class UploadService {
         originalStem: stem,
         format,
         libraryName,
+        mediaOverlayAvailable,
       });
     } catch (err) {
       const { errorClass, errorMessage } = this.parseError(err);