The body is mostly efficient with terse checklist lines and no explanation of basic concepts, but the intro line ('ensuring every code modification follows best practices') and a few explanatory labels are mild padding that could be tightened, matching 'mostly efficient but could be tightened'.

Checklist items are concrete imperatives and the Python ❌/✅ snippets are executable, but the bulk is instructive guidance rather than copy-paste-ready commands throughout, matching 'some concrete guidance but incomplete' for a fully copy-paste-ready 3.

The three-phase sequence (Before Starting → During Coding → After Completion) is unambiguous and includes an explicit verification checkpoint ('Verify execution - Ensure code runs correctly with no syntax errors'), which for a simple checklist skill satisfies the clear-sequence-with-validation anchor.

No bundle files exist and the ~70-line single-file skill is well-organized into clearly headed sections with no nested references, which matches the simple-skill allowance for a 3 with just well-organized sections.

The description names a domain ('everyday coding tasks') and two actions ('writing or modifying source code'), matching the 'names domain and some actions' anchor; it does not list multiple distinct concrete actions needed for a 3.

It states what the skill does and a partial when ('everyday coding tasks that involve...'), but lacks an explicit 'Use when...' trigger clause enumerating concrete user phrasings, which caps completeness at 2 per the guidelines.

Terms like 'everyday coding tasks' and 'writing or modifying source code' are fairly natural, but coverage is limited and omits common variations users would say (implement, add, fix, refactor), so it stops at 'some relevant keywords'.

It is constrained to writing/modifying source code but 'everyday coding tasks' is broad enough to overlap with specialized coding skills, matching 'somewhat specific but could still overlap'.