diff --git a/.gitignore b/.gitignore
index 958c8ff..c9aebcc 100644
--- a/.gitignore
+++ b/.gitignore
@@ -20,3 +20,6 @@ Practicals/hlsdev/include/
 Practicals/hlsdev/build/
 # scratch space
 .tmp/
+
+# clangd's local index cache: machine-specific and regenerated automatically
+.cache/
diff --git a/Practicals/practical-3b/game_of_life_practical3b/.cache/clangd/index/gameoflife.cpp.24C7FF41FD0C8DAA.idx b/Practicals/practical-3b/game_of_life_practical3b/.cache/clangd/index/gameoflife.cpp.24C7FF41FD0C8DAA.idx
deleted file mode 100644
index 0da9c64..0000000
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diff --git a/Practicals/practical-3b/game_of_life_practical3b/.cache/clangd/index/testbench.cpp.D2F0A5C7CF73988D.idx b/Practicals/practical-3b/game_of_life_practical3b/.cache/clangd/index/testbench.cpp.D2F0A5C7CF73988D.idx
deleted file mode 100644
index 995c6c1..0000000
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diff --git a/Practicals/practical-3b/game_of_life_practical3b/.cache/clangd/index/toplevel.cpp.B52AE2AA83ACE367.idx b/Practicals/practical-3b/game_of_life_practical3b/.cache/clangd/index/toplevel.cpp.B52AE2AA83ACE367.idx
deleted file mode 100644
index 614804e..0000000
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