How commands are grouped
Commands fall into a small number of natural groups: account and session management, the four connector commands covered in their own detail elsewhere, and settings that change how tCode behaves for the rest of the session or permanently.
The full list is always available from inside a running session by typing /help, and it stays in sync with this reference page automatically, since both are generated from the exact same underlying command list, not maintained as two separate documents that could drift apart.
This grouping is a way of thinking about the commands, not a technical distinction tCode enforces; every command is typed and matched the same way regardless of which conceptual group it falls into.
The reference table below is organized in roughly this same order, account and session commands first, then connectors, then settings, so browsing it top to bottom tends to move from things you would use in nearly every session toward things reached for more occasionally.
If you only remember one of these groups, the settings-oriented one is the most worth knowing by name, since /effort, /theme, and /config auto-approve are the three you are most likely to reach for repeatedly rather than once and forget, covered together in Configuration.