Document better how to add extra capabilities and/or add a Nix-native way to do it

[axelkar]

How do I do it e.g. for cssls?

--Enable (broadcasting) snippet capability for completion
local capabilities = vim.lsp.protocol.make_client_capabilities()
capabilities.textDocument.completion.completionItem.snippetSupport = true

require'lspconfig'.cssls.setup {
  capabilities = capabilities,
}

[traxys]

You can use https://nix-community.github.io/nixvim/plugins/lsp/index.html#pluginslspcapabilities, though we should add more examples

[purepani]

I also need to do this in order to set up blink.nvim fully. Are there any examples anywhere for how it looks?

[HeitorAugustoLN]

I also need to do this in order to set up blink.nvim fully. Are there any examples anywhere for how it looks?

Probably could take a look at: elythh/nixvim@2201c11, But he didn't use plugins.lsp.capabilities