add-grammar

Add a tree-sitter grammar to Cartographer's host grammar library (~/.cartographer/grammars) so Mimir can index another language — builds the grammar with the tree-sitter CLI, writes its tags/imports queries and manifest, validates with cartographer grammars and cartographer parse, then re-indexes the current project. Use when the user asks to add, install, or support a new language in Cartographer or Mimir's code index.