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# Why The authentication guide currently describes biometric prompts as a local gate. That is accurate for a biometric prompt by itself, but an authentication provider can pair the prompt with a device-bound credential to authenticate with a server and establish a new session. Clerk recently added this trusted-device flow for Expo, iOS, and Android. Documenting the distinction helps readers understand the difference between local biometric checks, server-verified trusted-device sign-in, and passkeys. Related documentation: - https://clerk.com/changelog/2026-08-17-biometric-sign-in-mobile-sdks - https://clerk.com/docs/expo/guides/development/custom-flows/authentication/biometric-sign-in # How - Clarify that a biometric prompt alone does not authenticate with a server. - Explain how an authentication provider can combine the prompt with a device-bound credential to create a session. - Use Clerk biometric sign-in as a concrete example. - Distinguish app-installation-scoped trusted-device credentials from WebAuthn passkeys. # Test Plan - Ran `npx -y oxfmt@0.47.0 --check docs/pages/develop/authentication.mdx`. - Ran `git diff --check`. - Confirmed the Clerk biometric sign-in and W3C WebAuthn links return HTTP 200. # Checklist - [ ] I added a `changelog.md` entry and rebuilt the package sources according to [this short guide](https://github.com/expo/expo/blob/main/CONTRIBUTING.md#-before-submitting) - [ ] This diff will work correctly for `npx expo prebuild` & EAS Build (eg: updated a module plugin). - [x] Conforms with the [Documentation Writing Style Guide](https://github.com/expo/expo/blob/main/guides/Expo%20Documentation%20Writing%20Style%20Guide.md)
# Why File.size is typed as number, but native Android and iOS bridges returned null when the file was missing or unreadable. For instance here on android (https://github.com/expo/expo/blob/main/packages/expo-file-system/android/src/main/java/expo/modules/filesystem/FileSystemFile.kt#L205-L211). But TS type it as `number` https://github.com/ACHP/expo/blob/5ff5560a425024bfc2f7bba3c67e83498cca1eaf/packages/expo-file-system/src/internal/NativeFileSystem.types.ts#L323 <img width="764" height="139" alt="image" src="https://github.com/user-attachments/assets/351828ea-6115-4c1c-ad4b-1aff388f1e18" /> # How Return 0 from both native bridges for those cases. File implements Blob, whose size must be a number, so number | null is not possible. # Test Plan Ran pnpm exec et check-packages expo-file-system. # Checklist - [x] I added a changelog.md entry and rebuilt the package sources according to this short guide (https://github.com/expo/expo/blob/main/CONTRIBUTING.md#-before-submitting) - [x] This diff will work correctly for npx expo prebuild & EAS Build (eg: updated a module plugin). - [x] Conforms with the [Documentation Writing Style Guide](https://github.com/expo/expo/blob/main/guides/Expo%20Documentation%20Writing%20Style%20Guide.md) --------- Co-authored-by: Bartłomiej Klocek <barthap10@gmail.com>
Automated upstream sync of generated reference content. | Generator | Status | | --- | --- | | App config schema | ➖ No changes | | Expo Skills | ✅ Synced | | EAS CLI reference | ➖ No changes | | Android permissions | ➖ No changes | ## Files - `docs/ui/components/ExpoSkillsTable/data/expo-skills.json` Co-authored-by: Expo Bot <expo-bot@users.noreply.github.com>
# Why The `NAVIGATION_DEPRECATED` action was deprecated and we can remove it. # How 1. Remove the action 2. Remove `DeprecatedNavigationInChildContext` 3. Remove all the usages # Test Plan CI # Checklist <!-- Please check the appropriate items below if they apply to your diff. --> - [x] I added a `changelog.md` entry and rebuilt the package sources according to [this short guide](https://github.com/expo/expo/blob/main/CONTRIBUTING.md#-before-submitting) - [ ] This diff will work correctly for `npx expo prebuild` & EAS Build (eg: updated a module plugin). - [ ] Conforms with the [Documentation Writing Style Guide](https://github.com/expo/expo/blob/main/guides/Expo%20Documentation%20Writing%20Style%20Guide.md) --------- Co-authored-by: Expo Bot <34669131+expo-bot@users.noreply.github.com>
# Why Linking is always enabled in expo-router, so we can remove the checks and logic for when it is not enabled # How <!-- How did you build this feature or fix this bug and why? --> # Test Plan CI # Checklist <!-- Please check the appropriate items below if they apply to your diff. --> - [x] I added a `changelog.md` entry and rebuilt the package sources according to [this short guide](https://github.com/expo/expo/blob/main/CONTRIBUTING.md#-before-submitting) - [ ] This diff will work correctly for `npx expo prebuild` & EAS Build (eg: updated a module plugin). - [ ] Conforms with the [Documentation Writing Style Guide](https://github.com/expo/expo/blob/main/guides/Expo%20Documentation%20Writing%20Style%20Guide.md) --------- Co-authored-by: Expo Bot <34669131+expo-bot@users.noreply.github.com>
… `expo-router/react-navigation` (#48895) # Why Remove the deprecated `Link` and `useLinkProps` exports from expo-router/react-navigation # How <!-- How did you build this feature or fix this bug and why? --> # Test Plan CI # Checklist <!-- Please check the appropriate items below if they apply to your diff. --> - [ ] I added a `changelog.md` entry and rebuilt the package sources according to [this short guide](https://github.com/expo/expo/blob/main/CONTRIBUTING.md#-before-submitting) - [ ] This diff will work correctly for `npx expo prebuild` & EAS Build (eg: updated a module plugin). - [ ] Conforms with the [Documentation Writing Style Guide](https://github.com/expo/expo/blob/main/guides/Expo%20Documentation%20Writing%20Style%20Guide.md) --- <sub>Stack created with <a href="https://github.com/github/gh-stack">GitHub Stacks CLI</a> • <a href="https://gh.io/stacks-feedback">Give Feedback 💬</a></sub>
# Why Fixes - #48982 Toggle currently sets state in `onAppear` which creates a small lag when it shows up the Checkmark. See before and after videos. The checkmark should appear on the first view render. ## Before https://github.com/user-attachments/assets/b912d6e8-3be0-4c15-95b1-ea70380a28cb ## After https://github.com/user-attachments/assets/2c246e7b-975b-40dc-99e5-5b9585b25589 <!-- Please describe the motivation for this PR, and link to relevant GitHub issues, forums posts, or feature requests. --> # How Set checked state in binding instead of onAppear. <!-- How did you build this feature or fix this bug and why? --> # Test Plan Tested the user shared repro <!-- Please describe how you tested this change and how a reviewer could reproduce your test, especially if this PR does not include automated tests! If possible, please also provide terminal output and/or screenshots demonstrating your test/reproduction. --> # Checklist <!-- Please check the appropriate items below if they apply to your diff. --> - [ ] I added a `changelog.md` entry and rebuilt the package sources according to [this short guide](https://github.com/expo/expo/blob/main/CONTRIBUTING.md#-before-submitting) - [ ] This diff will work correctly for `npx expo prebuild` & EAS Build (eg: updated a module plugin). - [ ] Conforms with the [Documentation Writing Style Guide](https://github.com/expo/expo/blob/main/guides/Expo%20Documentation%20Writing%20Style%20Guide.md) --------- Co-authored-by: Kudo Chien <kudo@expo.dev>
# Why Fixes - #49075 #43797 added `isEditing` flag but it never set to `false` after the manual drag is finished. So post manual drag, JS value prop update was getting dropped. <!-- Please describe the motivation for this PR, and link to relevant GitHub issues, forums posts, or feature requests. --> # How Use event count mechanism to keep the slider always accept new values and ignore if JS sends any old values due to async event. <!-- How did you build this feature or fix this bug and why? --> # Test Plan Tested user shared repro <!-- Please describe how you tested this change and how a reviewer could reproduce your test, especially if this PR does not include automated tests! If possible, please also provide terminal output and/or screenshots demonstrating your test/reproduction. --> # Checklist <!-- Please check the appropriate items below if they apply to your diff. --> - [ ] I added a `changelog.md` entry and rebuilt the package sources according to [this short guide](https://github.com/expo/expo/blob/main/CONTRIBUTING.md#-before-submitting) - [ ] This diff will work correctly for `npx expo prebuild` & EAS Build (eg: updated a module plugin). - [ ] Conforms with the [Documentation Writing Style Guide](https://github.com/expo/expo/blob/main/guides/Expo%20Documentation%20Writing%20Style%20Guide.md)
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