[Baseline] Pre-zombie-fix checkpoint

Investigation complete - 5 agents identified root causes:
- periodic_save_check.py: 540 processes/hour (53%)
- Background sync-contexts: 200 processes/hour (20%)
- user-prompt-submit: 180 processes/hour (18%)
- task-complete: 90 processes/hour (9%)
Total: 1,010 zombie processes/hour, 3-7 GB RAM/hour

Phase 1 fixes ready to implement:
1. Reduce periodic save frequency (1min to 5min)
2. Add timeouts to all subprocess calls
3. Remove background sync-contexts spawning
4. Add mutex lock to prevent overlaps

See: FINAL_ZOMBIE_SOLUTION.md for complete analysis

Co-Authored-By: Claude Sonnet 4.5 <noreply@anthropic.com>

check_zombie_processes.ps1

@@ -0,0 +1,28 @@
+# Check for zombie/orphaned processes during Claude Code sessions
+# This script identifies processes that may be consuming memory
+
+Write-Host "[INFO] Checking for zombie processes..."
+Write-Host ""
+
+# Check for Python processes
+$pythonProcs = Get-Process | Where-Object {$_.ProcessName -like '*python*'}
+Write-Host "[PYTHON] Found $($pythonProcs.Count) Python processes"
+if ($pythonProcs.Count -gt 0) {
+    $pythonProcs | Select-Object ProcessName, Id, @{Name='MemoryMB';Expression={[math]::Round($_.WorkingSet64/1MB,2)}}, StartTime | Format-Table -AutoSize
+}
+
+# Check for Node processes
+$nodeProcs = Get-Process | Where-Object {$_.ProcessName -like '*node*'}
+Write-Host "[NODE] Found $($nodeProcs.Count) Node processes"
+if ($nodeProcs.Count -gt 0) {
+    $nodeProcs | Select-Object ProcessName, Id, @{Name='MemoryMB';Expression={[math]::Round($_.WorkingSet64/1MB,2)}}, StartTime | Format-Table -AutoSize
+}
+
+# Check for agent-related processes (background tasks)
+$backgroundProcs = Get-Process | Where-Object {$_.CommandLine -like '*agent*' -or $_.CommandLine -like '*Task*'}
+Write-Host "[BACKGROUND] Checking for agent/task processes..."
+
+# Total memory summary
+$totalMem = (Get-Process | Measure-Object WorkingSet64 -Sum).Sum
+Write-Host ""
+Write-Host "[SUMMARY] Total system memory in use: $([math]::Round($totalMem/1GB,2)) GB"