Editor Support

lex has first-class editor support through the lex-lsp language server. All editors share the same language intelligence backend.

Features

Feature	Description
Syntax Highlighting	Semantic tokens for sessions, lists, definitions, annotations, inline formatting
Document Outline	Hierarchical symbol view of document structure
Hover Previews	Preview footnote and citation content
Go to Definition	Jump to footnote definitions, section targets
Find References	Find all uses of footnotes, citations
Formatting	Document and range formatting
Folding	Collapse sessions, lists, annotations, verbatim blocks
Spellcheck	With “Add to dictionary” support
Code Actions	Spelling suggestions, footnote fixes, reorder footnotes

Lexed (Desktop Editor)

Standalone, distraction-free editor built specifically for lex.

Stack: Electron + React + Monaco Editor

Download Latest Release

View on GitHub

Features

Monochrome theme (typography-focused, uses bold/italic instead of colors)
Multi-pane editing with flexible splits
Vim mode support
Full LSP integration

Keyboard Shortcuts (macOS)

Shortcut	Action
`Cmd+Shift+]` / `[`	Cycle through tabs
`Cmd+1` … `Cmd+9`	Focus pane by number
`Cmd+K`	Command palette
`Cmd+Shift+H`	Split horizontal
`Cmd+Shift+V`	Split vertical
`Cmd+Shift+/`	Show shortcuts reference

On Windows/Linux, Cmd maps to Ctrl and Option maps to Alt.

VS Code

Full VS Code integration with export/import commands and live preview.

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Installation

Build from source:

cd vscode
npm ci
npm run build
npx vsce package
# Install the generated .vsix file

Commands

Command	Description
Lex: Export to Markdown	Convert active .lex to Markdown
Lex: Export to HTML	Convert active .lex to HTML
Lex: Export to PDF	Convert active .lex to PDF (prompts for save location)
Lex: Import from Markdown	Convert active .md to lex format
Lex: Open Preview	Live HTML preview in current column
Lex: Open Preview to the Side	Live HTML preview side-by-side

Commands appear in the command palette and context menus when editing .lex or .md files.

Theming

The extension applies a monochrome theme to .lex files using typography (bold, italic) and grayscale intensity. Adapts to VS Code’s light/dark mode.

Neovim

Native Neovim plugin with LSP integration.

View on GitHub

Installation

With lazy.nvim:

{
    "lex-fmt/nvim",
    ft = "lex",
    dependencies = { "neovim/nvim-lspconfig" },
    config = function()
        require("lex").setup()
    end,
}

With packer.nvim:

use {
    "lex-fmt/nvim",
    requires = { "neovim/nvim-lspconfig" },
    config = function()
        require("lex").setup()
    end,
}

The plugin auto-downloads the lex-lsp binary on first use.

Configuration

require("lex").setup({
    -- Theme: "monochrome" (default) or "native"
    theme = "monochrome",

    -- Custom binary path (optional)
    cmd = { "/path/to/lex-lsp" },

    -- Additional lspconfig options
    lsp_config = {
        on_attach = function(client, bufnr)
            -- Your custom on_attach
        end,
    },
})

Theming

The default monochrome theme uses grayscale intensity levels:

Group	Usage
`@lex.normal`	Full contrast content text
`@lex.muted`	Medium gray structural elements
`@lex.faint`	Light gray meta-information
`@lex.faintest`	Barely visible syntax markers

Set theme = "native" to use your colorscheme’s standard markup highlights instead.

Feature Matrix

Feature	LSP	VS Code	Lexed	Neovim
Syntax Errors	✓	✓	✓	✓
Spellcheck	✓	✓	✓	-
Go to Definition	✓	✓	✓	✓
Find References	✓	✓	✓	✓
Document Format	✓	✓	✓	✓
Range Format	✓	✓	✓	?
Annotation Navigation	✓	-	✓	-
Spellcheck Fixes	✓	✓	✓	-
Reorder Footnotes	✓	✓	✓	-
Insert Asset	✓	✓	-	-
Insert Verbatim	✓	✓	-	-

✓ = Implemented, - = Not implemented, ? = Needs verification