neovim

name	neovim
description	Guide for this Neovim configuration -- a modular Lua-based IDE rooted at mods/dotfiles/nvim/. Use when configuring plugins, adding keybindings, setting up LSP servers, debugging, or extending the config. Covers lazy.nvim, plugin_registry, snacks.nvim pickers, blink.cmp completion, dual LSP architecture, DAP debugging, and which-key v3 aggregation.

Neovim Configuration Skill

Guide for working with this modular Neovim configuration. The config lives at mods/dotfiles/nvim/ within the home-manager flake and is symlinked to ~/.config/nvim/ via mkOutOfStoreSymlink (edits take effect immediately without Nix rebuild).

Quick Reference

Aspect	Value
Plugin Manager	lazy.nvim (bootstrapped in lua/user/lazy.lua)
Module Pattern	M.setup() + optional M.get_keymaps()
Leader Key	<Space> (<localleader> = ;)
Colorscheme	kanagawa.nvim
Picker Framework	snacks.nvim (NOT telescope)
Completion Engine	blink.cmp (NOT nvim-cmp)
File Explorer	nvim-tree (NOT neo-tree)
Formatter Engine	EFM LSP (format-on-save via BufWritePost)

Architecture Overview

mods/dotfiles/nvim/
├── init.vim                      # Bootstrap: sets termguicolors, loads user.init
├── lazy-lock.json                # Plugin version lock
├── lsp/                          # Native vim.lsp.config() server configs (Neovim 0.11+)
│   ├── basedpyright.lua          #   Each file returns a config table
│   ├── denols.lua
│   ├── efm.lua                   #   EFM formatter/linter config (read for language map)
│   ├── gopls.lua
│   ├── lua_ls.lua
│   ├── vtsls.lua
│   └── ...                       #   Read lsp/ directory for current server list
├── lua/user/
│   ├── init.lua                  # Main entry point (initialization order)
│   ├── options.lua               # Vim options
│   ├── keymaps.lua               # Base keymaps (non-which-key)
│   ├── autocommands.lua          # Autocommands (format-on-save, filetype, etc.)
│   ├── lazy.lua                  # lazy.nvim bootstrap + all plugin specs
│   ├── plugin_registry.lua       # Ordered list of plugin modules (single source of truth)
│   ├── blink.lua                 # blink.cmp opts (referenced by lazy.lua)
│   ├── trouble.lua               # trouble.nvim opts (referenced by lazy.lua)
│   ├── diff.lua                  # Non-modular plugin (legacy)
│   ├── lsp/
│   │   ├── init.lua              # vim.lsp.enable() calls + diagnostics config
│   │   ├── mason.lua             # Mason setup + ensure_installed servers
│   │   ├── attach.lua            # LspAttach autocmd (wires keymaps per-buffer)
│   │   ├── keymaps.lua           # Base LSP keymaps + per-server keymaps
│   │   └── actions.lua           # LSP code actions (organize imports, etc.)
│   ├── plugins/                  # Plugin config modules (category/name.lua)
│   │   ├── ai/                   #   Read plugin_registry.lua for current module list
│   │   ├── code/
│   │   ├── database/
│   │   ├── debug/
│   │   ├── editing/
│   │   ├── git/
│   │   ├── navigation/
│   │   ├── ui/
│   │   └── util/
│   ├── whichkey/
│   │   ├── whichkey.lua          # Main aggregator (combines all keymaps)
│   │   ├── plugins.lua           # Auto-discovers keymaps from registry modules
│   │   ├── find_snacks.lua       # <leader>f -- file/buffer finders
│   │   ├── search_snacks.lua     # <leader>h -- grep/search
│   │   ├── replace.lua           # <leader>r -- find & replace
│   │   ├── repl.lua              # REPL/slime keymaps
│   │   ├── scopes.lua            # Scope-related keymaps
│   │   ├── lsp.lua               # LSP-related which-key groups
│   │   └── global.lua            # Global/misc keymaps
│   ├── snacks/                   # Custom snacks.nvim pickers
│   │   ├── init.lua              # Snacks opts (dashboard, picker, notifier, etc.)
│   │   ├── find_files.lua        # File finding pickers
│   │   ├── search_files.lua      # Grep/search pickers
│   │   ├── git_files.lua         # Git changed/conflicted file pickers
│   │   ├── git_search.lua        # Grep within git-changed files
│   │   ├── scope.lua             # Scope picker
│   │   ├── compare.lua           # Compare picker
│   │   ├── common.lua            # Shared picker utilities
│   │   ├── ai_actions.lua        # AI action pickers
│   │   ├── ai_context_files.lua  # AI context file pickers
│   │   ├── proctmux.lua          # Proctmux command picker
│   │   └── commands/             # Command launcher categories
│   │       ├── init.lua          # Aggregates all command categories
│   │       ├── ai.lua
│   │       ├── finders.lua
│   │       ├── lsp.lua
│   │       ├── package_manage.lua
│   │       └── project.lua
│   ├── dap/                      # Per-language DAP configurations
│   │   ├── go.lua
│   │   ├── python.lua
│   │   └── typescript.lua
│   ├── utils/                    # Utility modules
│   │   ├── init.lua
│   │   ├── file_utils.lua
│   │   ├── git_utils.lua
│   │   ├── project_utils.lua
│   │   └── collection_utils.lua
│   └── core/                     # Core option/keymap modules
│       ├── options.lua
│       └── keymaps.lua

Dynamic note: Read the actual files for current state. The tree above is a structural guide -- files may be added or removed over time.

Initialization Order

Read lua/user/init.lua for the definitive boot sequence. The general flow is:

init.vim
  -> require("user.init")
    -> exrc_manager.source_local_config()   -- .nvim.lua project config (early)
    -> require("user.options")
    -> require("user.keymaps")
    -> require("user.lazy")                 -- lazy.nvim bootstrap + plugin specs
    -> require("user.lsp")                  -- mason, attach, vim.lsp.enable()
    -> plugin_registry loop                 -- setup() on each registered module
    -> require("user.whichkey.whichkey")    -- aggregates all keymaps
    -> require("user.autocommands")
    -> require("user.diff")                 -- non-modular legacy plugin
    -> exrc_manager.setup()                 -- finalize project config (late)

Standard Module Pattern

Plugin modules live in lua/user/plugins/<category>/<name>.lua. Each module follows this pattern:

local M = {}

function M.setup()
  local ok, plugin = pcall(require, "plugin-name")
  if not ok then
    vim.notify("plugin-name not found")
    return
  end

  plugin.setup({
    -- configuration
  })
end

-- Optional: keymaps are auto-discovered by whichkey/plugins.lua
function M.get_keymaps()
  return {
    shared = {
      { "<leader>x", group = "Group Name" },
    },
    normal = {
      { "<leader>xx", "<cmd>Command<cr>", desc = "Description" },
    },
    visual = {
      { "<leader>xx", "<cmd>Command<cr>", desc = "Description" },
    },
  }
end

return M

Key points:

• M.setup() is called during init by the registry loop in lua/user/init.lua
• M.get_keymaps() is optional -- if present, whichkey/plugins.lua auto-discovers and registers the keymaps
• Always use pcall when requiring plugins that might not be installed
• The return table must have shared, normal, and/or visual keys for keymap mode routing

Read lua/user/plugins/ui/colorscheme.lua or lua/user/plugins/debug/nvim-dap.lua for real working examples of this pattern.

Plugin Management

How Plugins Are Configured

This config separates plugin installation from plugin configuration:

1. lua/user/lazy.lua -- All plugin specs (installation, dependencies, lazy-loading). This is the require("lazy").setup({ spec = { ... } }) call.
2. lua/user/plugin_registry.lua -- Ordered list of module paths that get setup() called during init. This controls load order and keymap discovery.
3. lua/user/plugins/<category>/<name>.lua -- The actual configuration module with M.setup() and optional M.get_keymaps().

Adding a New Plugin

1. Add the plugin spec to lua/user/lazy.lua:

   { "author/plugin-name", event = "VeryLazy" },
   

2. Create a config module at lua/user/plugins/<category>/<name>.lua following the standard module pattern above. Categories: ai, code, database, debug, editing, git, navigation, ui, util.

3. Register in lua/user/plugin_registry.lua -- add "<category>.<name>" to M.modules in the appropriate position:

   M.modules = {
     "ui.notify",       -- must load early
     "ui.colorscheme",  -- must load early
     -- ...
     "<category>.<name>",  -- add in logical position
   }
   

IMPORTANT: Load order matters. UI plugins (colorscheme, notify) must load first. Read plugin_registry.lua for current ordering.

Plugin Commands

Command	Description
:Lazy	Open lazy.nvim dashboard
:Lazy sync	Update and install plugins
:Lazy profile	Startup time analysis
:Lazy clean	Remove unused plugins

LSP Configuration

This config uses a dual LSP architecture taking advantage of Neovim 0.11+'s native vim.lsp.config().

Architecture

Top-level lsp/ directory          lua/user/lsp/ directory
(server configs)                  (orchestration)
─────────────────                 ────────────────────────
lsp/gopls.lua                     lua/user/lsp/init.lua    -- vim.lsp.enable() + diagnostics
lsp/lua_ls.lua                    lua/user/lsp/mason.lua   -- mason setup + ensure_installed
lsp/efm.lua                       lua/user/lsp/attach.lua  -- LspAttach autocmd
lsp/vtsls.lua                     lua/user/lsp/keymaps.lua -- base + per-server keymaps
lsp/denols.lua                    lua/user/lsp/actions.lua -- code actions (organize imports)
lsp/basedpyright.lua
lsp/...

Server config files (lsp/<name>.lua) return a table consumed by vim.lsp.config():

return {
  root_markers = { "go.mod", "go.work" },
  settings = {
    gopls = {
      analyses = { unusedparams = true },
    },
  },
}

Orchestration (lua/user/lsp/init.lua) calls vim.lsp.enable() for each server and configures diagnostics.

Adding a New LSP Server

1. Create config file at lsp/<servername>.lua:

   return {
     root_markers = { "marker_file" },
     settings = {
       -- server-specific settings
     },
   }
   

2. Add to vim.lsp.enable() in lua/user/lsp/init.lua

3. Add to mason ensure_installed in lua/user/lsp/mason.lua (the servers list)

4. Optionally add per-server keymaps in lua/user/lsp/keymaps.lua under M.per_server

Read lua/user/lsp/init.lua for the current list of enabled servers and the deno/vtsls mutual exclusion logic.

Deno vs TypeScript Detection

lua/user/lsp/init.lua checks for deno.json/deno.jsonc at startup:

• Present: enables denols, skips vtsls
• Absent: enables vtsls, skips denols

These are mutually exclusive to avoid conflicts.

EFM Format-on-Save

EFM LSP handles formatting and linting. Configuration is in lsp/efm.lua.

How it works:

• autocommands.lua has a BufWritePost autocmd that calls vim.lsp.buf.format({ name = "efm" })
• EFM auto-detects formatters per project context:
  • deno.json present -> deno_fmt
  • biome.json / rome.json present -> biome
  • Otherwise -> eslint_d (lint + format)
• Can be overridden via .nvim.lua project config (lint table in _G.EXRC_M)

Read lsp/efm.lua for the complete language-to-formatter/linter mapping. It covers Go, Nix, shell, JS/TS, Lua, JSON, Python, Java, Elixir, and more.

LSP Keymaps

Base LSP keymaps are defined in lua/user/lsp/keymaps.lua and applied per-buffer on LspAttach. Read that file for the current mappings. Key ones include:

• gd -- go to definition
• gr -- references
• gl -- line diagnostics (float)
• <leader>lr -- rename
• <leader>la -- code action (via tiny-code-action)
• <leader>lf -- format (via EFM)
• <leader>ll -- run codelens

Per-server keymaps (e.g., <leader>li for organize imports on gopls/vtsls) are in M.per_server.

Keybindings

Which-Key Aggregation

Keymaps are aggregated from multiple sources in lua/user/whichkey/whichkey.lua:

1. Whichkey category files -- find_snacks.lua, search_snacks.lua, replace.lua, repl.lua, scopes.lua, lsp.lua, global.lua
2. Plugin auto-discovery -- whichkey/plugins.lua iterates plugin_registry.lua modules and collects get_keymaps() from any module that exports it
3. Inline mappings -- defined directly in whichkey.lua (root, database, debug, buffers, lazy/system, etc.)

IMPORTANT: To understand current keybindings, read the lua/user/whichkey/ files directly. Do NOT hardcode keymap lists -- they change frequently.

Leader Key Prefixes

Prefix	Category	Source File
<leader>f	Find (files, buffers, pickers)	whichkey/find_snacks.lua
<leader>h	Search (grep, symbols)	whichkey/search_snacks.lua
<leader>r	Replace	whichkey/replace.lua
<leader>l	LSP	whichkey/lsp.lua + lsp/keymaps.lua
<leader>d	Debug	whichkey/whichkey.lua (inline)
<leader>b	Buffers	whichkey/whichkey.lua (inline)
<leader>D	Database	whichkey/whichkey.lua (inline)
<leader>P	Lazy/System	whichkey/whichkey.lua (inline)
<leader>g	Git	Read whichkey/global.lua
<leader>a	AI	Read whichkey/global.lua + plugin modules

Read the specific files listed above for current mappings within each prefix.

Debugging (DAP)

Setup

DAP is configured in lua/user/plugins/debug/nvim-dap.lua. It sets up:

• nvim-dap core
• nvim-dap-ui (auto-opens/closes on debug sessions)
• nvim-dap-virtual-text (inline variable values)

Language Configs

Per-language debug configurations live in lua/user/dap/:

• go.lua -- Go (delve)
• python.lua -- Python
• typescript.lua -- TypeScript/JavaScript (Chrome, Node)

Read these files for current adapter configurations and launch profiles.

DAP Keymaps

DAP keymaps are defined both in whichkey.lua (inline debugging table) and in the nvim-dap module's get_keymaps(). All under <leader>d. Read lua/user/plugins/debug/nvim-dap.lua for the current list.

Snacks.nvim Pickers

Snacks.nvim replaces telescope as the picker framework. Custom pickers live in lua/user/snacks/.

Picker Modules

Module	Purpose
find_files.lua	File finding, path files, explorer tree toggle
search_files.lua	Live grep, grep from root, grep quickfix list
git_files.lua	Git changed files, conflicted files, branch diff files
git_search.lua	Grep within git-changed files
scope.lua	Scope-based picking
compare.lua	Comparison picker
ai_actions.lua	AI action picker (delegates to provider-specific modules)
ai_context_files.lua	AI context file selection
proctmux.lua	Proctmux/procmux command picker
common.lua	Shared utilities (paste_to_pattern, paste_to_search)

Command Launcher

lua/user/snacks/commands/init.lua aggregates command categories into a unified launcher accessible via <leader>fl. Categories are defined in separate files:

• ai.lua -- AI-related commands
• finders.lua -- Finder commands
• lsp.lua -- LSP commands
• package_manage.lua -- Package management commands
• project.lua -- Project commands

Read lua/user/snacks/commands/ for the current command list. Read lua/user/snacks/init.lua for snacks.nvim configuration (picker layout, dashboard, notifier, etc.).

Project-Specific Configuration

.nvim.lua files in project roots are loaded via exrc_manager (lua/user/plugins/util/exrc_manager.lua). They run at two points:

1. Early (before plugins) -- source_local_config() sources the file
2. Late (after all setup) -- setup() calls _G.EXRC_M.setup() if defined

Project configs expose state via _G.EXRC_M table. Common uses:

• Override lint config: _G.EXRC_M = { lint = { "biome" } }
• Add autocommands: _G.EXRC_M = { autocmds = { ... } }
• Custom setup logic: _G.EXRC_M = { setup = function() ... end }

Common Tasks

Adding Autocommands

Add to lua/user/autocommands.lua:

vim.api.nvim_create_autocmd("FileType", {
  pattern = { "markdown", "text" },
  callback = function()
    vim.opt_local.wrap = true
    vim.opt_local.spell = true
  end,
})

Adding Vim Options

Edit lua/user/options.lua -- options are defined as a table iterated with vim.opt[k] = v.

Creating Utility Functions

Add to or create files in lua/user/utils/:

-- lua/user/utils/my_utils.lua
local M = {}

M.my_function = function(args)
  -- implementation
end

return M

-- Usage: require("user.utils.my_utils").my_function(args)

The main lua/user/utils/init.lua provides extend_lists() and other shared helpers.

Adding Snacks Pickers

Create a file in lua/user/snacks/, then wire it into the appropriate whichkey file:

-- lua/user/snacks/my_picker.lua
local Snacks = require("snacks")
local M = {}

function M.pick_things(opts)
  opts = opts or {}
  Snacks.picker({
    title = "My Picker",
    items = { ... },
    -- picker config
  })
end

return M

Then add a keymap in the relevant whichkey/*.lua file to call it.

Code Style

• Indentation: Tabs (stylua configured with tabs)
• Formatting: stylua via EFM (auto-format on save)
• Naming: snake_case for files and functions
• Error handling: Always pcall() when requiring plugins
• Imports: require("user.module") for user code
• Modern APIs: vim.keymap.set, vim.bo[bufnr], vim.lsp.get_clients, vim.diagnostic.jump, vim.fs.root

Troubleshooting

Issue	Solution
Plugins not loading	:Lazy sync then :Lazy profile
LSP not starting	:checkhealth lsp, check lua/user/lsp/init.lua for enabled servers
Mason packages missing	:Mason, check lua/user/lsp/mason.lua ensure_installed
Treesitter errors	:TSUpdate
Slow startup	:Lazy profile
Keybinding conflicts	:verbose map <key> or :checkhealth which-key
Format-on-save not working	Check :LspInfo for EFM attachment, read lsp/efm.lua
Icons missing	Install a Nerd Font

Health Check

:checkhealth

Test Commands

# Test module loading
nvim --headless -c "lua require('user.plugins.category.name')" -c "qa"

# Test keymap discovery
nvim --headless -c "lua local p = require('user.whichkey.plugins'); print(vim.inspect(p.get_all_plugin_keymaps()))" -c "qa"

References

These reference files contain additional detail. Read them for specifics rather than relying on summaries:

• references/configuration.md - Core configuration options
• references/plugins.md - Plugin details
• references/plugin-deepdives.md - In-depth plugin guides
• references/lsp.md - LSP server reference
• references/keybindings.md - Keybinding reference
• references/debugging.md - DAP debugging guide
• references/performance.md - Optimization techniques
• references/tools.md - CLI tools and workflows
• references/troubleshooting.md - Common issues and solutions
• references/migration-0.11.md - Neovim 0.11 migration guide

Note: These reference files may be out of date. When in doubt, read the actual source files in mods/dotfiles/nvim/ for ground truth.