Rename notmuch_thread_results_t and notmuch_message_results_t to notmuch_threads_t and notmuch_messages_t respectively. Add a talloc context as the first argument to each command in notmuch.c. Write a "notmuch show" that displays a single thread. Fix to use the *last* Message-ID header if multiple such headers are encountered, (I noticed this is one thing that kept me from seeing the same message-ID values as sup). Audit everything for dealing with out-of-memory (and drop xutil.c). Write a test suite. Achieve 100% test coverage with the test suite.