It names a concrete action ('Run `make fmt`') and its purpose ('check the code format'), but describes only a single action with no additional detail about what this entails or what it covers.

It partially answers 'what' (run make fmt to check format) but completely lacks any 'when' guidance or explicit trigger clause. Per the rubric, a missing 'Use when...' clause caps completeness at 2, and the 'what' is also minimal, so this scores a 1.

The description contains 'make fmt', 'code format' but lacks natural user-facing trigger terms. Users might say 'format code', 'linting', 'style check', 'formatting', none of which are present. The terms used are narrow and technical.

The mention of `make fmt` is somewhat specific to a particular build system command, which reduces conflict risk slightly, but 'check the code format' is generic enough to overlap with linting, style-checking, or other formatting skills.

The skill is lean and efficient. Every line serves a purpose—command, what it checks, and how to fix common issues. No unnecessary explanations of what formatting is or how make works.

Provides a concrete, copy-paste ready command with the exact path, lists the specific checks performed, and gives specific fix instructions (lowercase first character, remove trailing punctuation).

The workflow mentions 'fix any issues found and re-run until clean' which implies a feedback loop, but it's not explicitly structured as a validation checkpoint. For a formatting check that can modify code, a more explicit validate-fix-revalidate sequence would be stronger.

This is a simple, single-purpose skill under 50 lines. The content is well-organized with a clear command, numbered list of checks, and fix instructions. No external references are needed.