Conciseness

The body is lean and table-driven with no padding, but a few passages explain statistics Claude already knows — "A 95% significance level means: if there were truly no difference between variants, there's only a 5% chance you'd see results this extreme by chance" and "The more variants and metrics tested simultaneously, the more false positives" — which could be trimmed. This fits anchor 4 (efficient, minor over-explanation) rather than 3, since the overwhelming bulk is dense checklists and templates.

Actionability

Fully actionable for an instruction-only skill: a copy-paste-ready hypothesis template with a worked example ("Because session replays show users abandoning at the shipping step..."), an ICE scoring procedure ("Score each 1 to 10"), a sample-size quick-reference table with explicit inputs, a five-outcome decision table, and a complete markdown output template covering the common cases. Stack-agnostic design is explicitly stated, justifying the absence of tool-specific commands.

Workflow Clarity

A 10-step sequenced workflow layered over a 4-phase framework, with explicit checkpoints: pre-launch parameter checklist ("Test parameters to define before launch"), QA checkpoint ("QA carefully (broken variants invalidate tests)"), run discipline ("Don't peek. Don't stop early"), and a decision framework covering all five outcome branches including feedback loops for inconclusive results ("Larger test, different angle, or move on").

Progressive Disclosure

Good structure with one clearly signaled one-level-deep reference (references/hypothesis-library.md — verified real, relevant, and non-nested) and well-organized sections. However, at ~270 lines with only one reference file, inline material such as the statistical foundations section (sample-size table, multiple-testing notes) is reference-grade content kept in the main body — minor organization gaps fitting anchor 4 rather than the fully-split structure of anchor 5.

Specificity

The description lists five concrete actions spanning the full CRO lifecycle — "audit, hypothesis generation, test design, statistical analysis, and rollout decisions" — which matches the comprehensive-coverage anchor; there are no gaps in the action list that would drop it to 4.

Completeness

It explicitly answers both "what" (the five-action description) and "when" ("Use this skill whenever the user wants to optimize conversion, run A/B tests, audit a funnel, generate test hypotheses, design experiments, or analyze test results"), with an extra explicit trigger clause for ambiguous-result situations.

Trigger Term Quality

Triggers include comprehensive natural terms and synonyms: "conversion optimization, CRO, A/B test, split test, multivariate test, hypothesis, conversion funnel, funnel audit, experiment design, statistical significance, lift, optimization" — covering the abbreviation (CRO), common variants (A/B, split, multivariate), and phrases users would naturally say.

Distinctiveness Conflict Risk

The core triggers (CRO, A/B test, conversion funnel, funnel audit) establish a clear niche, but the standalone trailing triggers "hypothesis", "optimization", and "lift" are broad and could match general optimization or experimentation skills — minor overlap risk with closely related skills, fitting anchor 4 better than the minimal-conflict anchor 5.