WSL2/Docker Disk Space Cleanup

Problem

WSL2 stores all data in ext4.vhdx files that:

• GROW automatically when adding files/building Docker images
• NEVER SHRINK automatically when files are deleted
• docker system prune frees space inside WSL but NOT on Windows SSD

Workflow

PHASE 1: Diagnose → PHASE 2: Cleanup → PHASE 3: Compact VHDX → PHASE 4: Prevent

PHASE 1: Diagnose