diff --git a/.git-blame-ignore-revs b/.git-blame-ignore-revs
new file mode 100644
index 0000000..938949b
--- /dev/null
+++ b/.git-blame-ignore-revs
@@ -0,0 +1,6 @@
+# Commits that only reformat code, which `git blame` can skip. GitHub's blame view reads
+# this file automatically; to use it locally, run
+# `git config blame.ignoreRevsFile .git-blame-ignore-revs` once in your clone.
+
+# Format the code with rustfmt (#17)
+68a23f1d4cdc5b90c81ff751f1c70bfb854b39fd
diff --git a/CONTRIBUTING.md b/CONTRIBUTING.md
index 9155cf6..62fba16 100644
--- a/CONTRIBUTING.md
+++ b/CONTRIBUTING.md
@@ -43,6 +43,9 @@ rustup target add wasm32-unknown-unknown
 trunk serve --release --open
 ```
 
+To make `git blame` skip commits that only reformat code, as GitHub's blame view does,
+run `git config blame.ignoreRevsFile .git-blame-ignore-revs` once in your clone.
+
 ## Checks your change must pass
 
 CI runs these on every pull request. Running them locally first saves a round trip: