# Nix Cleanup

> Run janitorial cleanup for this flake: flake check, statix/deadnix linting, and safe hygiene fixes.

- Skill: `majiayu000/nix-cleanup-2` (Agent Skill, multi-file: 2 files)
- Install (CLI): `npx skillmds add majiayu000/nix-cleanup-2`
- Raw SKILL.md: https://api.skillmd.com/api/skills/majiayu000/nix-cleanup-2/raw
- Safety review: pending
- Works with: Claude Code, Claude.ai, OpenAI Codex
- Category: Coding & Dev Tools
- Author: majiayu000 (https://skillmd.com/u/majiayu000)
- Updated: 2026-09-09
- Page: https://skillmd.com/skills/majiayu000/nix-cleanup-2

---


---
name: nix-cleanup
description: Run janitorial cleanup for this flake: flake check, statix/deadnix linting, and safe hygiene fixes.
---

# Nix Cleanup

## What I do
- Keep cleanup aligned with this repo's linting and workflow rules.
- Run checks in a safe order and summarize findings before edits.
- Apply small hygiene fixes (unused bindings, repeated keys, legacy syntax) when requested.

## When to use me
Use this skill when you want a janitorial pass before committing, or when Nix lint errors need cleanup.

## Workflow
1. Run `nix flake check --no-build` to validate the flake without builds.
2. Run `nix run nixpkgs#statix -- check .` for linting.
3. Run `nix run nixpkgs#deadnix -- .` for unused bindings.
4. Summarize findings and ask before auto-fixing.
5. If approved, apply `statix fix` and/or `deadnix -e`, then re-run checks.

## Hygiene rules
- Avoid repeated keys in attribute sets; nest under a single key.
- Remove empty `let` blocks and unused arguments.
- Prefer `lib.mkIf` over nested ifs.
- Use `mkEnableOption` for boolean options.
- Use `pkgs.stdenv.hostPlatform.system` instead of `system`.

## Safety
- Never run destructive commands.
- Never touch dotfile-managed program configs (see dotfiles policy).
- Ask before changes that alter secrets or host definitions.