pub const SEAT_MCP_MATCHER: &str = "^mcp__.+__ljos_.+$";Expand description
The seat’s MCP tools as Claude Code names them. The hook reads which
subagent calls one, so the server can bind that ballot to it. A
matcher with a ^ is a regular expression, unanchored unless written
so; joined to the tool list, it would make Write match TodoWrite.
So it is a PreToolUse group of its own.