Conciseness

Three separate sections — "Why Order Matters" (5 rebuttals), "Common Rationalizations" (11-row table), and "Red Flags" (13 bullets) — restate the same anti-rationalization material, and a graphviz block that Claude cannot render or execute consumes ~20 lines. This is noticeably verbose with several padded sections (anchor 2), beyond anchor 3's "some unnecessary explanation that could be tightened".

Actionability

Fully executable guidance throughout: paired Good/Bad TypeScript examples, real commands ("npm test path/to/test.test.ts"), a complete worked bug-fix cycle from failing test to passing test, a "When Stuck" table with specific solutions, and a concrete verification checklist. This matches anchor 5 (copy-paste ready, covering the common cases).

Workflow Clarity

The red-green-refactor cycle is clearly sequenced with explicit mandatory verification steps after each phase, error-recovery feedback loops ("Test errors? Fix error, re-run until it fails correctly"; "Other tests fail? Fix now"), and a final verification checklist — exactly anchor 5's "explicit validation steps; feedback loops for error recovery; checklists for complex processes".

Progressive Disclosure

No bundle files exist, yet the body's only reference — "read @testing-anti-patterns.md" — points to a nonexistent file, leaving navigation broken. Meanwhile ~100 lines of objection-handling and anti-pattern content that clearly belongs in a separate reference file are inlined in SKILL.md. This matches anchor 2 rather than anchor 3, since the defect is not just imperfect organization but a dangling reference plus inlined secondary content.

Specificity

The description names the domain ("implementing any feature or bugfix") but lists no concrete actions — the word "test" never even appears. It matches anchor 2 ("Names the domain but actions are minimal or generic") and falls short of anchor 3, which requires 1-2 concrete stated actions.

Completeness

The "when" is explicit ("Use when implementing any feature or bugfix, before writing implementation code") but the "what" is entirely absent — the skill's actual behavior (write tests first) is never stated. Anchor 2 ("only 'when' is present without 'what'") matches exactly; anchor 3 is the inverse case and does not apply.

Trigger Term Quality

"implementing any feature or bugfix" provides some natural keywords, but major variations users would say are missing: "test", "TDD", "write tests", "refactoring". This fits anchor 3 (relevant keywords present, common synonyms missing) rather than anchor 4's "good keyword coverage with only a few natural terms missing".

Distinctiveness Conflict Risk

"implementing any feature or bugfix" would fire on virtually every coding task, creating high overlap risk with any implementation, testing, or code-review skill. "TDD" is never named, so the skill cannot be distinguished from other testing skills — anchor 2 ("Very broad; high overlap risk with many similar skills").