diff --git a/.gitattributes b/.gitattributes
new file mode 100644
index 0000000..074c790
--- /dev/null
+++ b/.gitattributes
@@ -0,0 +1,18 @@
+# --- KiCad project files (text, enable diff) ---
+*.kicad_sch  text diff
+*.kicad_pcb  text diff
+*.kicad_pro  text diff
+*.kicad_prl  text diff
+
+# --- Gerber files (RS-274X, plain text but no normalization) ---
+*.gbr        text eol=lf
+*.gbrjob     text eol=lf
+
+# --- Drill files (Excellon, plain text) ---
+*.drl        text eol=lf
+
+# --- Prevent Git from misclassifying fabrication outputs as binary ---
+*.gbr        -diff
+*.gbrjob     -diff
+*.drl        -diff
+