diff --git a/conductor/tracks/fix_memory_subprocess_20260203/plan.md b/conductor/tracks/fix_memory_subprocess_20260203/plan.md
index 24be4ce..9218379 100644
--- a/conductor/tracks/fix_memory_subprocess_20260203/plan.md
+++ b/conductor/tracks/fix_memory_subprocess_20260203/plan.md
@@ -6,7 +6,7 @@
     - [ ] Ensure all callers pass lists of strings correctly.
 
 ## Phase 2: Fix Memory Leak in buildings.py
-- [ ] Task: Implement windowed reading for ground snapping
+- [x] Task: Implement windowed reading for ground snapping (f9668f0)
     - [ ] Calculate `srcwin` (xoff, yoff, xsize, ysize) based on tile bounds and VRT geotransform.
     - [ ] Update `ReadAsArray` to use the calculated window.
     - [ ] Handle edge cases (partial overlap).