Conciseness

The ~435-line body has several padded sections: "Usage Examples" narrates what "the skill will" do instead of instructing, "When to Use" restates the description, "Notes" repeats the Phase 3 thresholds, and the checklist re-iterates the phases. This matches anchor 2 (noticeably verbose, several unnecessary or padded sections); it is above anchor 1 because no space is spent explaining concepts Claude doesn't know.

Actionability

Concrete thresholds (>2 std dev, 10%/30%), exact formulas, output templates, and two runnable JS fitness functions are present, but the core operation — "Count executable statements (not comments, blank lines...)" and "Parse source files in component directory" — is described rather than executable, with no command or code that performs the counting. Matches anchor 3 (some concrete guidance but incomplete / pseudocode-level); anchor 4 would require the central steps to be executable too.

Workflow Clarity

A clear Phase 1→3 sequence with an explicit Analysis Checklist serving as a checkpoint; this is read-only analysis, so the destructive/batch validation cap does not apply. It falls short of anchor 5 because there are no validation checkpoints on outputs (e.g., verifying components' statements sum to the total or that leaf-node identification found no parents).

Progressive Disclosure

Headers give decent structure, but everything is inlined in one monolithic file: full output-format templates, fitness-function code, and per-language statement-counting notes would belong in reference files, and no bundle files exist to offload them. Matches anchor 3 (some structure, content that should be separate is inline); above anchor 2 because organization is not minimal, below anchor 4 because nothing is split out.

Specificity

Names the domain and two concrete actions ("Maps architectural components" and "measures their size to identify what should be extracted first") but stops short of covering the full capability set (inventory generation, statistics, recommendations). It fits anchor 3: 1-2 concrete actions, not comprehensive — below anchor 4, which expects several specific actions with only minor gaps.

Completeness

Explicitly answers both: what ("Maps architectural components in a codebase and measures their size to identify what should be extracted first") and when ("Use when asking... or planning where to start decomposing"), with concrete trigger phrases. This directly matches anchor 5 and exceeds anchor 4, whose 'when' is less explicit.

Trigger Term Quality

Quoted natural user phrasings — "how big is each module?", "what components do I have?", "which service is too large?", "analyze codebase structure", "size my monolith" — cover synonyms (module, component, service, monolith) users would actually say. Comprehensive coverage matches anchor 5; anchor 4's 'a few natural terms missing' does not apply given the breadth of variations.

Distinctiveness Conflict Risk

Clear niche (architectural component sizing for decomposition planning) with distinct triggers and an explicit negative boundary ("Do NOT use for runtime performance sizing or infrastructure capacity planning") that minimizes conflict with performance/capacity skills. Matches anchor 5; anchor 4's 'minor overlap risk' is superseded by the explicit do-not-use clause.