Skills & TMs
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Skills & the Taskmaster
Thie Taskmaster (almost always shortened to TM) is not some brooding hulk of a giant bent on making sure you do the required work, but rather a system where skills can be improved by practising them. Here is the official page: Discworld concepts help: taskmaster
adventuring tree
covert tree
One good way to get post guildmax stealing tm's is by filching katanas from samurai in BP. Shoplifting difficult items is another way.
You can tm co.st.in and co.st.ou with the case command. The stealth check (for whether they see you) is separate from the casing check so normally you tm stealth from people that you can't quite actually case. Imperial guards in BP, and female heavies in the AM guild, are some good targets for post guildmax stealth tm's.