Neovim, Helix, and other editors

Any editor that speaks LSP can host sextant-lsp. We don’t ship configs for them yet, but the integration is a few lines.

Neovim (nvim-lspconfig)

-- After installing sextant-lsp on PATH (`cargo install --path crates/sextant-lsp`):
local lspconfig = require("lspconfig")
local configs = require("lspconfig.configs")

if not configs.sextant then
  configs.sextant = {
    default_config = {
      cmd = { "sextant-lsp", "--stdio" },
      filetypes = {
        "rust", "python", "go", "java",
        "typescript", "typescriptreact",
        "javascript", "javascriptreact",
      },
      root_dir = lspconfig.util.root_pattern(".sextant", ".git"),
      settings = {},
      init_options = { disableLlm = true },
    },
  }
end

lspconfig.sextant.setup({})

Helix (languages.toml)

[language-server.sextant]
command = "sextant-lsp"
args = ["--stdio"]
config = { disableLlm = true }

[[language]]
name = "rust"
language-servers = ["rust-analyzer", "sextant"]

# Repeat the language-servers extension for any other language you use.

Sublime Text (LSP package)

{
  "clients": {
    "sextant": {
      "enabled": true,
      "command": ["sextant-lsp", "--stdio"],
      "selector": "source.rust | source.python | source.go | source.java | source.ts | source.tsx | source.js | source.jsx",
      "initializationOptions": { "disableLlm": true }
    }
  }
}

Notes that apply everywhere

• Repo root resolution. The LSP walks up from the document looking for .sextant/ then .git/. If your editor sets a workspace folder, that takes precedence.
• disableLlm. On by default in our VS Code extension and recommended elsewhere — LLM rules can be slow and may incur API spend. Toggle off only when you want them in the inner loop.
• Hover. All clients should render the markdown body returned by textDocument/hover. If your client strips formatting, the rule documentation will still be readable.
• Diagnostics. Square code field on the diagnostic carries the rule id (e.g. builtin.size.file-length); use it for client-side filtering or quickfix integrations.

See also

• Editor overview
• VS Code