Conciseness

Mostly efficient — dense lists, no over-explanation of concepts Claude already knows — but the same five capabilities are enumerated three times (Quick Reference, Core Concepts, and Modules), and footer metadata plus conflicting version numbers (frontmatter '2.4.0' vs body 'Version: 2.5.0') add time-sensitive clutter. Not 4 because the duplicated capability lists and version inconsistency are more than minor trimmable instances.

Actionability

Mostly concrete guidance: numbered step sequences for each workflow, an explicit confidence scale ('0=false positive, 25=somewhat, 50=moderate, 75=high, 100=certain' with 'drop issues <80 confidence'), and executable verification commands ('run with -count=3', 'go test -race'). Not 5 because the primary testing workflows include no example commands or code (e.g., a sample characterization test or pytest invocation), deferring all specifics to references.

Workflow Clarity

Clear numbered sequences with explicit validation checkpoints ('Verify baseline: all characterization tests PASS before any change', 'Apply refactoring with continuous test execution') and a concrete end-of-skill verification checklist. Not 5 because error-recovery feedback loops are not spelled out (e.g., what to do when characterization tests fail mid-refactor), and the debugging/refactoring/performance workflows are summarized in one line with details deferred.

Progressive Disclosure

Sections are well-organized with clearly signaled one-level-deep 'See [reference]' links, and all six linked reference files exist. However, the Modules section links to modules/INDEX.md and four module files that do not exist in the bundle (no modules/ directory), links use absolute '~/.claude/skills/...' install paths rather than bundle-relative paths, and three of nine reference files (reference.md, examples.md, e2e-desktop-native-recipes.md) are never linked from the body. Not 4 because broken module links and orphaned reference files are more than minor organization gaps.

Specificity

Lists several concrete actions ('writing tests, measuring coverage... characterization tests, performance profiling, and TRUST 5 quality-assurance validation') with only minor gaps. Not 5 because core capabilities from the body (debugging, refactoring, code review, CI/CD) are absent from the description; not 3 because multiple specific concrete actions are named rather than just 1-2.

Completeness

Explicitly answers both: 'when' via the concrete 'Use when writing tests, measuring coverage, or running characterization, performance, or PR-review QA' clause, and 'what' via 'DDD testing, characterization tests, performance profiling, and TRUST 5 quality-assurance validation'. Not 5 because the 'what' clause omits roughly half the skill's core capabilities and leans on internal jargon ('TRUST 5', 'DDD') without plain-language grounding.

Trigger Term Quality

Includes natural phrases users would say: 'writing tests', 'measuring coverage', 'PR-review QA', 'characterization'. Not 5 because common variations like 'unit tests', 'code review', 'test coverage', and 'debugging' are missing.

Distinctiveness Conflict Risk

'Characterization' and 'TRUST 5' are distinctive, but generic triggers like 'writing tests' and 'measuring coverage' would match virtually any testing skill, and the body itself lists five sibling moai testing skills (e.g., moai-domain-backend 'Backend testing patterns') with overlapping scope. Somewhat specific but real overlap risk with closely related skills; not 4 because the broad testing/QA trigger surface conflicts with multiple similar skills.