Android: `fill` truncates input with standard ASCII special characters (+, @)

[clayne11]

Description

fill on Android truncates text input when the string contains standard ASCII special characters like + and @. Only the first few characters are entered before input stops.

Steps to Reproduce

1. Open an app with a text field on Android emulator:

   agent-device open com.example.app --platform android --session my-session

2. Take a snapshot showing a text field:

   agent-device snapshot -i --session my-session

   Output: @e2 [text-field] "PHONE_NUMBER_or_EMAIL_ADDRESS"

3. Fill the field with an email containing + and @:

   agent-device fill @e2 "curtis.layne+test+73kmc@uber.com" --session my-session

4. Error:

   Error (COMMAND_FAILED): Android fill verification failed
   {
     "expected": "curtis.layne+test+73kmc@uber.com",
     "actual": "curti"
   }
   

Expected Behavior

fill should enter the complete string including + and @ characters. These are standard ASCII characters (not emoji or CJK), so the non-ASCII IME limitation mentioned in the docs should not apply.

Workaround

Fall back to adb shell input text with the phone number (digits only) instead of email. For strings with special chars, adb shell input text with URL-encoded characters works but is not ideal (%2B for +, %40 for @).

Environment

• agent-device version: latest (installed via npx)
• Platform: Android emulator (Pixel 8 Pro API 36)
• Host OS: macOS (Darwin, Apple Silicon)
• Context: WebView-based login form (Uber auth)

Notes

• Issue Fail to fill text with Chinese character or emoji #116 was similar but for non-ASCII (Chinese/emoji) characters and was fixed by PR fix: harden Android non-ASCII text input path #118 with clipboard injection fallback.
• This bug is different: the characters are standard ASCII but input truncates after ~5 chars. Possibly a timing/race condition in character-by-character input, or +/@ being interpreted as special by the underlying adb shell input text command.