Android runs one instrumentation per package: a second `am instrument`
force-stops the first ("stop com.kuhy.a11ydump due to start instr"), and
so does `install -r`. The live two-session run on the Pixel caught two
sessions' dumps killing each other ("Process crashed"). dump_display now
runs install + instrument under a per-serial flock; a dump takes well
under a second, so queueing costs nothing noticeable.
After the fix the same 300 s run had 0 failures across 659 actions, and
the real screen and both apps stayed where they were.
Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com>
Claude-Session: https://claude.ai/code/session_01WpA6wW2DKiovQADTdjWJoH
A raw `adb shell input tap` took no lease, so one session's tap landed in
another session's app (2026-09-25). python_pkg.phone_guard classifies every
adb call in a Bash command and, as the Claude Code PreToolUse hook, takes
the matching phone_lease (one app / real screen / whole phone) or exits 2:
key/text input without -d, input on another session's virtual display, or
a lease still held elsewhere after 40 s.
android_ui gains --display self|<id>: it drives only this session's
phone_vd display under that app's lease, and every input carries -d.
uiautomator sees display 0 only, so virtual-display trees come from a tiny
instrumentation APK (A11yDump.java) built from source without Gradle.
Prunes the oldest evidence artifact to stay under the 60-file cap.
Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com>
Claude-Session: https://claude.ai/code/session_01WpA6wW2DKiovQADTdjWJoH
