all
---

- discuss merge with Heiko...

- regression checks on the results of the tests (sed+diff the log)
- add debug messages to be used in the test suite?

compat
------

- clarify doc/comments about relying on etex/pdf primitives

modutils
--------

- make `\listfiles` show Lua modules?

cctb
----

- support for unicode-letters?
- logic from Heiko's luatex.sty?

mcb
---

- add an analogue of `callback.find()`, see #4

bytecode registers
------------------

- create submodule for that
- only lua interface, most probably