Dev Environment

The dev home-manager module is a single import that delivers a complete day-to-day environment: fish + starship + a zellij/yazi workspace via yazelix, nixvim with 30+ plugins, and the usual CLI sidekicks (atuin, bat, eza, fd, fzf, gh, glab, gpg, lazygit, ripgrep, zoxide, delta). Personal identity (git user, ssh keys, sops) lives in your own config — dev provides the tooling, not the secrets.

Terminal multiplexer (zellij via yazelix)

Yazelix wires zellij + yazi into a single workspace where the file manager and shell panes coexist. There’s no tmux anymore.

Action	Default keybinding
Open file picker	yazelix’s `y` from any pane (or run `y` for yazi standalone)
Edit a file from yazi	`Enter` — opens in nvim, or routes to a shared zellij `nvim` pane if one is open
New pane / split	zellij’s `Ctrl+p` then a direction key
Detach session	`Ctrl+o d`
Quit session	`Ctrl+q`

Configuration lives upstream in yazelix’s docs — the dev module just enables it with terminal = "ghostty" and binds yazi/lazygit/helix to host (non-flake) versions for speed.

Shell (fish)

Fish is enabled with empty greeting, atuin for history search, zoxide for cd, and yazelix integration. There are no fixed abbreviations baked in by the module — add your own in your personal config if you want them.

Starship prompt shows: [ssh:host] dir [git_branch][git_status] (nix) (k8s/ctx) (cmd_duration) >

Hostname only when SSH’d in (ssh: prefix).
Directory truncated to 3 segments, clamped to repo root.
Git status is [$ahead_behind$modified] inline with the branch.
Nix shell marker shows when you’re inside nix develop / nix shell.
Kubernetes context/namespace, when the current dir matches a kube-related path.
Command duration only for commands ≥ 2s.
Prompt char is > — green on success, red on the last non-zero exit.

File manager (yazi)

Yazi opens via y (shell wrapper) or from within yazelix. Defaults: hidden files visible, natural sort, directories first.

Press Enter on a text-ish file and it opens in nvim — or hands off to an existing zellij nvim pane if one’s already running (the rule is in mgr.opener.edit).

Neovim (nixvim)

Leader key is Space. The full plugin and LSP set is in modules/home/dev.nix — the highlights below.

Key	Action
`-`	Open parent directory (oil.nvim file explorer)
`q`	Close oil buffer
`Ctrl+s`	Open file in vertical split (in oil)
`Space ff`	Find files (telescope)
`Space fl`	Live grep across project
`Space fB`	Switch buffers
`Space fo`	Recent files
`Space fb`	File browser (telescope)
`Space f/`	Fuzzy find in current buffer
`Space f<CR>`	Resume last telescope search

Harpoon (quick file switching)

Pin up to 4 files for instant access:

Key	Action
`Space ha`	Add current file to harpoon
`Space hh`	Toggle harpoon quick menu
`Space h1`–`Space h4`	Jump to harpoon file 1–4

Flash (jump anywhere)

Press s then type 2 characters to jump to any visible match. Labels appear on matches — type the label to jump.

LSP

Key	Action
`Space gd`	Go to definition
`Space gr`	List references
`Space gI`	Go to implementation
`Space gt`	Go to type definition
`Space fs`	Document symbols
`Space fd`	Diagnostics

Diagnostics float automatically on CursorHold. Inlay hints are enabled.

Enabled language servers: bash, C/C++ (clangd), CSS, Docker, Go, HTML, LaTeX (ltex), Lua, Markdown, Nix (nil), Python (pyright), Rust (rust-analyzer), Terraform, TypeScript, YAML, Zig.

Treesitter text objects

Select, move between, and swap code structures.

Selection (visual mode):

Key	Selects
`vaf` / `vif`	Around/inside function
`vac` / `vic`	Around/inside class
`vaa` / `via`	Around/inside parameter
`vai` / `vii`	Around/inside conditional
`val` / `vil`	Around/inside loop

Movement:

Key	Jumps to
`]f` / `[f`	Next/previous function start
`]F` / `[F`	Next/previous function end
`]c` / `[c`	Next/previous class start
`]a` / `[a`	Next/previous parameter

Swap:

Key	Action
`Space sa`	Swap parameter with next
`Space sA`	Swap parameter with previous

Surround

Key	Action	Example
`ys{motion}{char}`	Add surround	`ysiw"` wraps word in quotes
`cs{old}{new}`	Change surround	`cs"'` changes `"` to `'`
`ds{char}`	Delete surround	`ds"` removes surrounding quotes

Other features

Key	Action
`Space u`	Toggle undotree (persistent undo history across sessions)
`Space fq`	Quickfix list
`Space fr`	Registers
`Space f'`	Marks
`Space fh`	Help tags

Formatting on save

Conform-nvim with LSP fallback:

Language	Formatters
Go	gofmt, goimports
Python	isort, black
Terraform/HCL	terraform_fmt, hclfmt
Nix	alejandra
Lua	stylua
YAML	yamlfix
Other	trim_whitespace

Copilot

GitHub Copilot is wired through copilot-cmp (completion menu), not ghost text. Suggestions appear alongside LSP completions.

Git

Configured with delta for side-by-side diffs, absorb, histogram diff algorithm, zdiff3 merge style, and rerere. The module does not set user.name or user.email — add those in your own config:

programs.git.settings.user = {
  name = "Your Name";
  email = "you@example.com";
};

nixos-config