+* Subprojects. I think the "bind commit" approach has been
+ outlined at sufficiently detailed level. Maybe find time to
+ actually start prototyping it?
+
+ <7vacdzkww3.fsf@assigned-by-dhcp.cox.net>
+
+* Shallow clones.
+
+* Mark entries as "assume unchanged" in the index.
+ New option to update-index to set or drop the bit is needed.
+
+ - update-index --no-stat paths...
+ - update-index --with-stat paths...
+
+ Also a config item '[core] trust_stat = false' would enable
+ this automatically:
+
+ - "update-index" with or without --add would mark the path
+ after registering. Should we make the working tree file
+ read-only at this point?
+
+ - checkout-index -u would mark the path and makes the working
+ tree file read-only.
+
+ Impacts to various commands:
+
+ - update-index --refresh would ignore them.
+
+ - diff-files would say unchanged.
+
+ - diff-index without --cached acts the same way as diff-index
+ --cached.
+