YAML Extra

lang.yaml adds YAML support through yaml-language-server, wired to the SchemaStore.nvim schema catalog for validation and completion against well-known schemas (GitHub Actions, Kubernetes, Compose, and more), with Prettier formatting.

Enable it

-- ~/.config/blak/lua/blak/user.lua
return {
  extras = {
    enabled = {
      "lang.yaml",
    },
  },
}

Because this extra adds a plugin (SchemaStore.nvim), run:

:BlakExtras sync

What it adds

Surface	Contribution
Treesitter	yaml
Mason	prettier, prettierd
LSP	yamlls with SchemaStore schemas
Formatting	prettierd (fallback prettier) for yaml
Plugin	b0o/SchemaStore.nvim

yamlls installs automatically through Mason (package yaml-language-server).

How schemas load

SchemaStore.nvim is pulled in lazily from the server’s before_init hook, so the schema catalog only loads when yamlls actually starts. The extra disables the server’s built-in schema store in favor of SchemaStore.nvim. To pin a schema to a path, add it under lsp.servers.yamlls.settings.yaml.schemas:

return {
  extras = { enabled = { "lang.yaml" } },
  lsp = {
    servers = {
      yamlls = {
        settings = {
          yaml = {
            schemas = {
              ["https://json.schemastore.org/github-workflow.json"] = "/.github/workflows/*",
            },
          },
        },
      },
    },
  },
}

Install and verify

:BlakExtras sync
:BlakToolsInstall
:BlakTreesitterInstall
:BlakDoctor

Open a .yaml file and check :LspInfo for yaml-language-server.