feat(neovim): add Neovim configuration and integrate with home profiles
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# Declarative Neovim config via nixvim. Goal: a real, lean IDE — not a
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# feature-for-feature VSCode clone. Every plugin here earns its place.
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{ pkgs, ... }:
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{
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programs.nixvim = {
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enable = true;
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defaultEditor = true;
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vimAlias = true; # `vim` -> nvim, handy when SSH'd into the VPS/homelab
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colorschemes.catppuccin = {
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enable = true;
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settings.flavour = "mocha";
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};
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globals.mapleader = " ";
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opts = {
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number = true;
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relativenumber = true;
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shiftwidth = 2;
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tabstop = 2;
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expandtab = true;
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termguicolors = true;
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signcolumn = "yes";
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scrolloff = 8;
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};
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# --- File explorer ---
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plugins.neo-tree = {
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enable = true;
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settings.window.width = 30;
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};
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# --- Fuzzy finder: files, grep, buffers, LSP symbols ---
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plugins.telescope = {
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enable = true;
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extensions.fzf-native.enable = true;
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};
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# --- Treesitter: syntax highlighting/parsing for your stack ---
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plugins.treesitter = {
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enable = true;
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settings.ensure_installed = [
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"nix" "bash" "lua" "markdown" "json" "yaml"
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"rust" "go" "gomod" "c" "cpp" "c_sharp" "python"
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"javascript" "typescript" "tsx" "vue" "html" "css"
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];
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};
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# --- LSP: one server per language/toolchain you use ---
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plugins.lsp = {
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enable = true;
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servers = {
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nixd.enable = true;
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bashls.enable = true;
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rust_analyzer = {
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enable = true;
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installCargo = true;
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installRustc = true;
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};
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gopls.enable = true;
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clangd.enable = true; # C / C++
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csharp_ls.enable = true;
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pyright.enable = true;
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ts_ls.enable = true; # JS/TS, React
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volar.enable = true; # Vue
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html.enable = true;
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cssls.enable = true;
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tailwindcss.enable = true;
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jsonls.enable = true;
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};
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keymaps.lspBuf = {
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"gd" = "definition";
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"gr" = "references";
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"K" = "hover";
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"<leader>rn" = "rename";
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"<leader>ca" = "code_action";
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};
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};
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# --- Autocompletion ---
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plugins.cmp = {
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enable = true;
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settings.sources = [
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{ name = "nvim_lsp"; }
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{ name = "path"; }
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{ name = "buffer"; }
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];
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};
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plugins.cmp-nvim-lsp.enable = true;
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plugins.cmp-path.enable = true;
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plugins.cmp-buffer.enable = true;
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# --- Format on save ---
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plugins.conform-nvim = {
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enable = true;
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settings = {
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format_on_save = {
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lsp_fallback = true;
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timeout_ms = 500;
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};
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formatters_by_ft = {
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rust = [ "rustfmt" ];
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go = [ "gofmt" ];
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c = [ "clang-format" ];
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cpp = [ "clang-format" ];
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python = [ "black" ];
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javascript = [ "prettier" ];
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typescript = [ "prettier" ];
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javascriptreact = [ "prettier" ];
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typescriptreact = [ "prettier" ];
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vue = [ "prettier" ];
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nix = [ "nixpkgs-fmt" ];
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};
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};
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};
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# --- Git: gutter signs, hunk stage/reset, blame ---
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plugins.gitsigns.enable = true;
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# --- Statusline ---
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plugins.lualine.enable = true;
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# --- Discoverable keybindings while you're still learning ---
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plugins.which-key.enable = true;
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# --- AI agent: CodeCompanion, curated natively in nixvim ---
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# Configured to reuse your existing `claude`/`gemini` CLI auth via ACP
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# adapters instead of a separate Anthropic Console API key.
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#
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# Verified against https://codecompanion.olimorris.dev/configuration/adapters-acp
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# (CodeCompanion >= v18.0.0, which is what's pinned by nixvim's nixpkgs as of
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# 2026-08). Two things changed from an older/assumed layout:
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# - the default-adapter key is `interactions.chat.adapter`, not
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# `strategies.chat.adapter` (renamed in v18.0.0);
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# - the built-in adapter names are `claude_code` and `gemini_cli` (no
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# `_acp` suffix) and live under `adapters.acp.<name>`.
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#
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# Neither adapter has a true zero-config mode that silently piggybacks on
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# an already-logged-in CLI session:
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# - gemini_cli: `defaults.auth_method = "oauth-personal"` reuses the
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# `gemini` CLI's own login — no key needed, closest thing to "just
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# use my existing session".
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# - claude_code: there's no oauth-personal equivalent. Run
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# `claude setup-token` once (ties to your Pro/Max subscription rather
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# than a Console API key) and save the result to
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# ~/.config/codecompanion/claude-oauth-token (chmod 600, outside the
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# nix store). It's read at runtime via the `cmd:` prefix below rather
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# than embedded in this file.
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plugins.codecompanion = {
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enable = true;
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settings = {
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interactions.chat.adapter = "claude_code"; # switch to "gemini_cli" per-chat
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adapters.acp = {
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claude_code.__raw = ''
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function()
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return require("codecompanion.adapters").extend("claude_code", {
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env = {
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CLAUDE_CODE_OAUTH_TOKEN = "cmd:cat ~/.config/codecompanion/claude-oauth-token",
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},
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})
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end
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'';
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gemini_cli.__raw = ''
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function()
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return require("codecompanion.adapters").extend("gemini_cli", {
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defaults = {
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auth_method = "oauth-personal",
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},
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})
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end
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'';
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};
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};
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};
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# --- Editor-level tooling only: formatters conform.nvim shells out to.
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# Language toolchains themselves (cargo, go, dotnet-sdk, nodejs,
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# a compiler, a python interpreter) come from your per-project
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# nix-shell / flake devShell, not from here — launch nvim from
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# inside that shell (`nix develop`, or nix-shell + direnv) so LSP
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# servers resolve the right toolchain via PATH.
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extraPackages = with pkgs; [
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python3Packages.black
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prettier
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nixpkgs-fmt
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];
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keymaps = [
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{ mode = "n"; key = "<leader>e"; action = "<cmd>Neotree toggle<CR>"; }
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{ mode = "n"; key = "<leader>ff"; action = "<cmd>Telescope find_files<CR>"; }
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{ mode = "n"; key = "<leader>fg"; action = "<cmd>Telescope live_grep<CR>"; }
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{ mode = "n"; key = "<leader>fb"; action = "<cmd>Telescope buffers<CR>"; }
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# CodeCompanion
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{ mode = [ "n" "v" ]; key = "<leader>ac"; action = "<cmd>CodeCompanionChat Toggle<CR>"; }
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{ mode = "v"; key = "<leader>aa"; action = "<cmd>CodeCompanionChat Add<CR>"; }
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{ mode = "n"; key = "<leader>ai"; action = "<cmd>CodeCompanion<CR>"; } # inline assistant
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];
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};
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}
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