The TCL Twitter client code wrote during the last update to compute the amount of characters use the Twitter API to determine the maximal, but cache the value.
We need to document the process to update the value somewhere in the documentation (and do it).
So, I thought the code to handle this situation has been introduced in 8d5a1eb3aed075049, but it's only the size of the links.
We need to check if Twitter now publishes the information in API, and if not, decide if we store it in the registry or hardcode it.