Also there was several requests to create a more formal grammar to describe the grammars but the tree-sitter developers doesn't like the idea and reject then.

Also there was several requests to create a more formal grammar to describe the grammars but the tree-sitter developers doesn't like the idea and reject then. But some people did nice attempts like https://github.com/eatkins/tree-sitter-ebnf-generator https://github.com/eatkins/tree-sitter-ebnf-generator that I also adapted and exposed it here https://mingodad.github.io/lua-wasm-playground/ https://mingodad.github.io/lua-wasm-playground/ to allow play with it online (select "Tree-sitter-ebnf-generator" from examples then click "Run" to see a "grammar.js" generated from the content in "Input Text (arg[1])").