xHR Attendance

1. Call the bundled xhr-assistant MCP server's read tool with skills/attendance/SKILL.md.
2. Follow only child entrypoints declared by that index.
3. Call that same MCP server's read tool for the single matching leaf before taking action.
4. Follow the leaf's validation and execution contract exactly.
5. Call that same MCP server's exec tool only for a leaf-declared script and never guess paths.
6. If exec returns AUTHENTICATION_REQUIRED, ask for explicit confirmation, call authenticate with no arguments, and retry the original exec once after success.
7. Never request or accept an access token in chat or tool arguments.
8. Obtain explicit confirmation before an action that changes xHR data.