# Nix Review

> - Nix code-review rubric — the flake quality gate (nix flake check, formatter --check, statix, deadnix, nix build/eval), a severity-tiered checklist (purity, reproducibility, injection, packaging, dev-env, modules), the Approve/Warning/Block verdict, and the "what proves what" table. Use when reviewing Nix code or a flake, checking for impure derivations or IFD, or deciding if a change is mergeable. Triggers: nix review, review flake, statix, deadnix, nix flake check, impure derivation, IFD.

## Facts
- Page: https://tashan.sh/capability/skill-gurinderu-nix-review
- tashan id: skill:gurinderu/nix-review
- Source: https://github.com/gurinderu/craft
- Type: skill
- Category: security
- tashan score: not scored (catalogued only — too little public evidence)
- Adoption: 9.0
- Upkeep: 100.0
- Freshness: 99.0
- Evidence coverage: 84% of the inputs this score can use
- Health: active
- Instruction depth: not yet graded
- Official: no

## Install

```sh
cp -r nix-review ~/.claude/skills/
```

## Security audit
Not scanned. We audit npm-published capabilities; this one has no npm package we can resolve, or has not reached the queue. This is not a clean bill of health.

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Measured 2026-08-09 by tashan (https://tashan.sh) from public evidence. Scorer s5.