diff --git a/.gitattributes b/.gitattributes
new file mode 100644
index 00000000..4b30a400
--- /dev/null
+++ b/.gitattributes
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+# Enforce LF in the working tree regardless of a contributor's core.autocrlf.
+# Without this, Git on Windows smudges every text file to CRLF on clone, stash
+# pop, or checkout, which fails `bun run format:check` (prettier endOfLine: lf).
+* text=auto eol=lf
+
+# Binary assets Git must not touch.
+*.png binary
+*.jpg binary
+*.jpeg binary
+*.gif binary
+*.webp binary
+*.ico binary
+*.pdf binary
+*.woff binary
+*.woff2 binary
+*.db binary