Conciseness

The body is lean and assumes Claude's competence — no concept explanations, every line carrying actionable architecture guidance. It is not a 2 because there is no unnecessary explanation or padding to tighten.

Actionability

Names concrete authorities to route through (BaseIntegrator, AuthResolver, CommandLogger, etc.) and a specific guardrail script (scripts/lint-architecture-boundaries.sh), giving copy-ready instruction. It is not a 2 because guidance is specific and executable rather than abstract; code absence is appropriate for an instruction-only skill.

Workflow Clarity

As a simple, single-purpose instruction skill under 50 lines with clearly organized 'When to activate' and 'Key rules' sections plus an explicit dual-guardrail checkpoint, the workflow is unambiguous. It is not a 2 because the guardrail (regression test + static check) supplies the validation checkpoint the anchor asks for.

Progressive Disclosure

The body references external files (a persona link and architecture.instructions.md) but does not signal them as navigable progressive-disclosure sections — the persona link is dropped without context. It is not a 3 because references are not clearly organized for discovery, and not a 1 because content is sectioned and references are only one level deep.

Specificity

Lists multiple concrete actions — 'creating new modules, refactoring class hierarchies, introducing design patterns, or making changes spanning 3+ files' — matching the score-3 anchor. It is not a 2 because the actions are specific and enumerated rather than a single vague domain mention.

Completeness

The 'Activate when …' clause is an explicit trigger equivalent to 'Use when …', answering both what the skill does and when to use it. It is not a 2 because the when-guidance is explicit rather than merely implied.

Trigger Term Quality

Trigger terms like 'refactoring class hierarchies' and 'design patterns' are relevant but lean technical and miss common user phrasings a non-architect might say. It is not a 3 because coverage of natural user terms is incomplete, and not a 1 because the terms are domain-appropriate and recognizable.

Distinctiveness Conflict Risk

Scoping to 'the APM CLI codebase' with architectural triggers gives it a clear niche unlikely to fire for unrelated skills. It is not a 2 because the codebase binding removes the overlap risk a generic architecture description would carry.