Android file attachment silently fails on OneUI 7 (Android 15) via Remote Control — content not received

Description

When attaching files through the Claude Code mobile app using Remote Control on a Samsung Galaxy S25 Ultra (OneUI 7 / Android 15), the file appears to attach successfully — no error is shown — but the file content is never received by the Claude session. The attachment silently drops.

Steps to reproduce

1. Open Claude Code on a Samsung Galaxy S25 Ultra (OneUI 7 / Android 15)
2. Connect to a PC via Remote Control
3. Start a conversation and use the file attachment button to attach a .md file stored on the phone
4. No error appears; the file appears to attach
5. Claude does not receive any file content

Expected behavior

File content is transmitted and received by Claude, same as on other Android devices.

Actual behavior

File silently fails to transmit. No error message. Claude receives nothing.

Device info

• Affected device: Samsung Galaxy S25 Ultra
• OS: Android 15 / OneUI 7
• Claude Code app: latest version (updated)
• Mode: Remote Control connected to PC
• File type tested: Markdown (.md)

Not affected

• Samsung Galaxy Fold 6 (OneUI 6): file attachment via Remote Control works correctly with the same file types and workflow

Hypothesis

OneUI 7 / Android 15 changed how content URIs are resolved for file sharing. The app may be receiving a restricted URI from the file picker that resolves to nothing on Android 15, without surfacing an error. The Fold 6 on OneUI 6 uses the older URI scheme which Claude Code handles correctly.

Additional context

• The file picker opens normally
• File selection completes with no error
• The issue is specific to file content not being transmitted — photos appear to work (per issue #42156)
• Workaround: copy-paste text content directly