diff --git a/.git-blame-ignore-revs b/.git-blame-ignore-revs
new file mode 100644
index 0000000..c7b7b31
--- /dev/null
+++ b/.git-blame-ignore-revs
@@ -0,0 +1,6 @@
+# Revisions listed here are skipped by `git blame` (git >= 2.23) so mechanical,
+# whole-repo reformatting does not bury the real authorship of each line.
+# Configure once per clone:  git config blame.ignoreRevsFile .git-blame-ignore-revs
+#
+# Prettier one-time repo-wide format pass (R2 S1b, 2026-07-21)
+51c36c2071728d2cd7ae580b7bfdf21f6867a347