diff --git a/({,+ b/({,+
deleted file mode 100644
index e69de29..0000000
diff --git a/.gitignore b/.gitignore
new file mode 100644
index 0000000..08d7bbc
--- /dev/null
+++ b/.gitignore
@@ -0,0 +1,9 @@
+# Whitelist: this repo holds ONLY measurement data with a fixed layout.
+# Everything at the root is ignored unless explicitly allowed below, so stray
+# files (shell redirection accidents, tool artifacts) can never be committed.
+/*
+!/.gitignore
+!/.gitea/
+!/README.md
+!/lamps/
+!/solar-charge-controllers/
diff --git a/review b/review
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index e69de29..0000000
diff --git a/{, b/{,
deleted file mode 100644
index e69de29..0000000