Conciseness

The body is dense and table-driven ('Quick Reference' with 24 convention rows, tight ✓/✗ code blocks), and rationale lines like 'This is load-bearing, not cosmetic' are brief and earned. However, the same conventions appear three times across the Quick Reference, 'Frequently Missed Conventions', and the 26-row Common Mistakes table (e.g. New/NewTypeName, isConnected, lowercase error strings each recur), so it sits at 'efficient with minor over-explanation that could be trimmed' rather than perfectly lean.

Actionability

Every rule is paired with exact, copy-ready identifiers: 'MaxPacketSize', 'parseHTTPResponse', 'mrand "math/rand"', mistake→fix pairs like '`GetName()` getter → Go omits `Get`', and concrete tooling handoffs ('revive, predeclared, misspell, errname', gopls rename). This fully matches the anchor 'fully executable; specific examples cover the common cases' for a convention-reference skill.

Workflow Clarity

As a lookup/reference skill the single action is unambiguous (check the table, apply the rule), and the risky batch operation it implies — renaming identifiers — is delegated with validation checkpoints ('refuses a rename that would break interface satisfaction', linter enforcement). It is not a 5 because the apply-fix path is delegated rather than sequenced in-skill, and there is no explicit validate-then-proceed loop inside this skill.

Progressive Disclosure

Clear overview (Quick Reference + core rules) with five well-signaled, one-level-deep references under 'Detailed Categories', each annotated with its topic ('Getter/setter patterns (Go omits `Get`...)', 'Interface naming (`Reader`, `Closer` suffix with `-er`)'). All five referenced files exist in ./references/ with no deeper nesting — an exact match to the anchor example structure.

Specificity

It enumerates the full concrete scope — 'packages, constructors, structs, interfaces, constants, enums, errors, booleans, receivers, getters/setters, functional options, acronyms, test functions, and subtest names' — and grounds the choices in exact identifiers ('New vs NewTypeName, isConnected vs connected, ErrNotFound vs NotFoundError'). This is comprehensive, concrete coverage, not vague claims.

Completeness

Both questions are answered explicitly: what ('Go naming conventions — covers packages, constructors...') and when ('Use this skill when writing new Go code, reviewing or refactoring... Also trigger when the user mentions MixedCaps vs snake_case'), with concrete trigger phrases throughout — a direct match to the score-5 exemplar pattern.

Trigger Term Quality

Excellent natural-term coverage with synonyms: 'Go (Golang)', 'writing new Go code, reviewing or refactoring', 'naming best practices', 'utils/helpers anti-patterns', plus the exact phrases a user would utter in a debate — 'MixedCaps vs snake_case, ALL_CAPS constants, Get-prefix on getters'. Matches the 'comprehensive coverage of natural terms including synonyms' anchor.

Distinctiveness Conflict Risk

It carves a clear niche (naming decisions only) and closes the biggest overlap risk with an explicit negative trigger: 'Do NOT use for general Go implementation questions that don't involve naming decisions.' That boundary clause keeps it from firing on general Go coding, refactor-execution, or lint-config requests.