Add TODO item

diff --git a/TODO b/TODO
index 17ee8b88f6aecd598d1c499b396877f3c12361ee..5df48a3ab0fa56dac7757d71bae8652e280df0fb 100644 (file)
--- a/TODO
+++ b/TODO
@@ -2,6 +2,7 @@
 - Use size_t in sanitize?
 - Buffer error handling?
 - Better define HB_INTERNAL
+- Future-proof metrics struct
 
 hb-ot:
 - Fix ot query APIs