Reload Window leaves orphaned claude child processes; panel hangs binding IPC

Versions

• Cursor 3.1.17 (darwin-arm64)
• Claude Code extension 2.1.120
• macOS Darwin 23.6.0

Repro

1. Open Cursor with the Claude Code panel active, start a conversation.
2. Cmd+Shift+P → "Developer: Reload Window".
3. Panel reloads blank, no input field. Hang persists indefinitely.
4. Terminal claude also hangs during this state.

Evidence

After reload, ps aux | grep "native-binary/claude" shows multiple live claude processes from prior sessions (observed: 3 PIDs, ~3.3GB combined resident memory) that were not terminated on extension deactivate.

Workaround: pkill -f "native-binary/claude" + reopen panel + /resume.

Expected

Extension deactivate() should terminate spawned claude child processes so the new extension host instance can bind IPC cleanly on reload.

Impact

Loses live conversation state on every reload. /resume recovers the transcript but not in-flight tool calls or plan-mode state. Started after a recent Cursor update; was not an issue on the prior Cursor version.