Use DLM in Neovim

The dlm-lsp language server attaches to Neovim through nvim-lspconfig.

Install

pip install dlm-lsp
which dlm-lsp   # confirm it's on PATH

Configure

Add to your Neovim config (Lua, e.g. ~/.config/nvim/lua/plugins/dlm.lua or anywhere in your init.lua):

-- Recognize .dlm files
vim.filetype.add({ extension = { dlm = "dlm" } })

-- Register the LSP
local lspconfig = require("lspconfig")
local configs = require("lspconfig.configs")

if not configs.dlm_lsp then
  configs.dlm_lsp = {
    default_config = {
      cmd = { "dlm-lsp" },
      filetypes = { "dlm" },
      root_dir = lspconfig.util.find_git_ancestor,
      single_file_support = true,
      settings = {},
    },
  }
end

lspconfig.dlm_lsp.setup({})

If dlm-lsp isn't on your PATH (e.g. installed inside a venv), pass the absolute path:

cmd = { "/Users/you/.venvs/dlm/bin/dlm-lsp" },

Verify

Open a .dlm file. Run :LspInfo and confirm dlm_lsp is attached. If not, :LspLog shows the spawn error.

You'll get:

• Diagnostics through the standard Neovim diagnostic interface
• Hover (K) on base_model: keys and section fences
• Completion through your usual completion plugin (nvim-cmp, coq_nvim, the built-in Ctrl-x Ctrl-o, etc.)
• Code actions through vim.lsp.buf.code_action()

Optional: Tree-sitter highlighting

Neovim uses Tree-sitter for highlighting. There is no tree-sitter-dlm parser yet; if you want richer highlighting before that lands, set the filetype to markdown for the body region and rely on LSP semantic tokens for the frontmatter and fence accents.