My Neovim + LSP Setup (Lazy.nvim + Nix/Home Manager)

Feb 17, 2026

I don’t use VSCode / other GUI stuff for lots of reasons. Mainly because I feel like they force AI on my throat, and I’ll end up too dependent on those AI tools for coding (not that I hate AI or anything).

For that reason, I use my own neovim 🔗 setup on my trusty Ghostty 🔗 terminal.

I’ll enumerate my Neovim setup here, which is focused on LSP defaults and reproducibility via Nix/Home Manager. I will not go too deeply on Nix/Home Manager as it will probably be an info overload, but stay tuned for another post about that.

Now, I am using lazy.nvim as a plugin, but you could use anything you like. I mainly use it for its lazy, ironic I know, approach.

Layout

init.lua — entrypoint
lua/custom/plugins/ — plugin specs
lua/custom/configs/ — actual configuration (LSP, cmp, treesitter, keymaps, settings)
lua/custom/util/ — helpers (notably lspconfig.lua)
spell/ — custom spell additions

Home Manager deploys everything into ~/.config/nvim as symlinks to the Nix store (/nix/store/...home-manager-files/...), so the config is declarative and reproducible.

LSP

My LSP config is split into:

configs/lsp.lua — server setup, diagnostics, and common defaults
util/lspconfig.lua — helper glue for lspconfig patterns

I use LSPs for all the languages I code with including

Python
Go
Rust
Nix
Lua
C/C++
HTML/CSS
LaTeX
Markdown
TypeScript
React

They have been a real help for my dev journey, so I highly recommend understanding LSPs and how to use them.

Completion

Completion is configured in:

configs/cmp.lua
plugins/cmp.lua

Notably, I also have a plugins/coq.lua entry — I’ve experimented with both completion stacks.

Treesitter

Treesitter config lives in configs/treesitter.lua, with extra niceties like rainbow delimiters (plugins/rainbow-delimeters.lua) for better readability in nested code.

Daily-driver plugins

A few highlights from lua/custom/plugins/:

Telescope (fuzzy finding)
Gitsigns (git hunks/blame)
Trouble (diagnostics list)
Neo-tree / Nvim-tree (file explorer)
Bufferline (buffer UX)
Harpoon (fast file jumps)
Nvterm (terminal)
Zen Mode (focus)

Language extras

I keep language-specific setup in plugin files:

Go: plugins/go.lua
Rust: plugins/rustaceanvim.lua
Typst: plugins/typst.lua
Debugging: plugins/dap.lua

Reproducibility notes

Config is deployed via Home Manager, so rolling back/upgrading is easy
Language servers/tools are best installed through Nix (system, home, or devShell) so Neovim stays predictable

Wanna Check It Out?

This is all on my GitHub here 🔗. Make sure to star it to not miss any updates.

Here is what my setup looks like Ziad's Neovim setup

Adios!