diff --git a/.gitignore b/.gitignore
index 8ac7d1f..38f3d18 100644
--- a/.gitignore
+++ b/.gitignore
@@ -9,6 +9,12 @@ build-tsan/
 .DS_Store
 compile_commands.json
 
+# Python build/cache artifacts
+__pycache__/
+*.py[cod]
+*.egg-info/
+.pytest_cache/
+
 # Local Claude Code agent state (memory, skills, etc.)
 .claude/
 build-tsan-d/
diff --git a/clients/python/secsgem_client/__pycache__/__init__.cpython-312.pyc b/clients/python/secsgem_client/__pycache__/__init__.cpython-312.pyc
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diff --git a/clients/python/secsgem_client/__pycache__/_client.cpython-312.pyc b/clients/python/secsgem_client/__pycache__/_client.cpython-312.pyc
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diff --git a/clients/python/secsgem_client/__pycache__/_enums.cpython-312.pyc b/clients/python/secsgem_client/__pycache__/_enums.cpython-312.pyc
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diff --git a/clients/python/secsgem_client/_proto/__pycache__/__init__.cpython-312.pyc b/clients/python/secsgem_client/_proto/__pycache__/__init__.cpython-312.pyc
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diff --git a/clients/python/secsgem_client/_proto/__pycache__/equipment_pb2.cpython-312.pyc b/clients/python/secsgem_client/_proto/__pycache__/equipment_pb2.cpython-312.pyc
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diff --git a/clients/python/secsgem_client/_proto/__pycache__/equipment_pb2_grpc.cpython-312.pyc b/clients/python/secsgem_client/_proto/__pycache__/equipment_pb2_grpc.cpython-312.pyc
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diff --git a/interop/.gitignore b/interop/.gitignore
deleted file mode 100644
index c18dd8d..0000000
--- a/interop/.gitignore
+++ /dev/null
@@ -1 +0,0 @@
-__pycache__/