diff --git a/src/skills/style/nix/SKILL.md b/src/skills/style/nix/SKILL.md
index e5f9058..cfcd9bd 100644
--- a/src/skills/style/nix/SKILL.md
+++ b/src/skills/style/nix/SKILL.md
@@ -7,3 +7,12 @@ description: Use when creating, editing, or reviewing Nix files in this reposito
 
 Use this skill as the source of truth for repository Nix conventions.
 Follow the shared style skill instructions in `src/skills/style/STYLE.md`.
+
+After editing Nix files, run:
+
+```bash
+nix run .#fix
+```
+
+Finish when `nix run .#fix` succeeds and the Nix change follows the loaded rules.
+If the command fails, report the failure.