backend/new.js (6 lines):
	- line 428: // TODO this comparison should use UTF-8 encoding, not JavaScript's UTF-16
	- line 874: // new parent-child relationship in objectMeta. TODO: also handle link/move operations.
	- line 945: // TODO if the counter is in a list element, we need to add a 'remove' action when deleted
	- line 1132: // lexicographically first (TODO check ordering of keys beyond the basic multilingual plane).
	- line 1845: const binaryChange = encodeChange(change) // TODO: avoid decoding and re-encoding again
	- line 1995: actorIds: this.actorIds, // TODO: sort actorIds (requires transforming all actorId columns in opsColumns)


frontend/context.js (1 line):
	- line 552: // TODO what if there is a conflicting value on the same key as the counter?


backend/sync.js (1 line):
	- line 376: // TODO: this recomputes the SHA-256 hash of each change; we should restructure this to avoid the