diff --git a/apps/readest-app/src-tauri/gen/apple/project.yml b/apps/readest-app/src-tauri/gen/apple/project.yml
index b230b5a7..5c0bda45 100644
--- a/apps/readest-app/src-tauri/gen/apple/project.yml
+++ b/apps/readest-app/src-tauri/gen/apple/project.yml
@@ -146,9 +146,13 @@ targets:
           NSExtensionPointIdentifier: com.apple.share-services
           NSExtensionPrincipalClass: $(PRODUCT_MODULE_NAME).ShareViewController
           NSExtensionAttributes:
+            # Web URLs only. Do NOT add NSExtensionActivationSupportsText: a
+            # .txt file is public.plain-text (conforms to public.text), so that
+            # key makes this article-URL clipper activate for plain-text FILES
+            # it can't handle (the share sheet hangs). Book files must fall
+            # through to the main app's CFBundleDocumentTypes import path.
             NSExtensionActivationRule:
               NSExtensionActivationSupportsWebURLWithMaxCount: 1
-              NSExtensionActivationSupportsText: true
     # Entitlements referenced via CODE_SIGN_ENTITLEMENTS build setting
     # rather than xcodegen's `entitlements:` block — otherwise xcodegen
     # may overwrite the file (even with no properties declared) during
diff --git a/apps/readest-app/src/__tests__/ios/share-extension-activation-rule.test.ts b/apps/readest-app/src/__tests__/ios/share-extension-activation-rule.test.ts
new file mode 100644
index 00000000..f5020526
--- /dev/null
+++ b/apps/readest-app/src/__tests__/ios/share-extension-activation-rule.test.ts
@@ -0,0 +1,43 @@
+import { describe, it, expect } from 'vitest';
+import { readFileSync } from 'fs';
+import { resolve } from 'path';
+
+/**
+ * Regression guard: sharing a `.txt` file to Readest on iOS got stuck.
+ *
+ * The Share Extension (added in #4256 / #4267) is an article-URL clipper — its
+ * `ShareViewController` only ever extracts an http(s) URL from the shared item.
+ * Its activation rule enabled `NSExtensionActivationSupportsText`, but a `.txt`
+ * file is UTI `public.plain-text` (which conforms to `public.text`), so that key
+ * made the extension activate for plain-text FILES it cannot handle: the share
+ * sheet hung instead of the file taking the main app's CFBundleDocumentTypes
+ * "Copy to Readest" open-in-place path (which imports txt fine, exactly like the
+ * EPUB/PDF that never matched the extension).
+ *
+ * Fix: the extension activates only for web URLs, never for text — so `.txt`
+ * (and any plain-text file) routes to the working document-open import path.
+ *
+ * We assert on `project.yml` only. It is the xcodegen source of truth: Tauri's
+ * iOS CLI runs `xcodegen` at build time, which regenerates each target's
+ * `Info.plist` from this file. The committed `ShareExtension/Info.plist` is a
+ * generated artifact (marked `skip-worktree`) and must not be relied on.
+ */
+
+// `NSExtensionActivationSupportsText` is legitimately named in a `#` comment
+// warning contributors not to re-add it. Strip comments so the check targets
+// active config only.
+const stripYamlComments = (text: string): string => text.replace(/#.*$/gm, '');
+
+const projectYml = stripYamlComments(
+  readFileSync(resolve(process.cwd(), 'src-tauri/gen/apple/project.yml'), 'utf-8'),
+);
+
+describe('iOS Share Extension activation rule (txt share stuck)', () => {
+  it('does not enable NSExtensionActivationSupportsText (would capture .txt files)', () => {
+    expect(projectYml).not.toContain('NSExtensionActivationSupportsText');
+  });
+
+  it('still activates for web URLs (article clipping preserved)', () => {
+    expect(projectYml).toContain('NSExtensionActivationSupportsWebURLWithMaxCount');
+  });
+});