Conciseness

The body is mostly efficient tables, checklists, and templates, but sections like 'Statistical Significance' ('95% confidence = p-value < 0.05; Means <5% chance result is random'), 'The Peeking Problem' prose, and 'Test One Thing — Otherwise you don't know what worked' re-explain concepts Claude already knows. These unnecessary explanation blocks go beyond the 'minor instances' of anchor 4, while the bulk remains dense and useful (not anchor 2's heavy padding).

Actionability

Concrete, usable artifacts dominate: a fill-in hypothesis template, real sample-size quick-reference tables with numbers, calculator links, pre-launch and analysis checklists, and a copy-paste playbook template. Some guidance stays high-level ('Check confidence intervals'; tool names like PostHog and LaunchDarkly with no setup steps), so it falls short of anchor 5's fully-executable coverage.

Workflow Clarity

The section order lays out a clear sequence (assess → hypothesize → design → implement → run → analyze → document) reinforced by explicit checkpoints: a pre-launch checklist, during-test DO/avoid lists, and a 6-step analysis checklist. There are no explicit error-recovery loops (validate → fix → retry), so it does not reach anchor 5; checkpoints are far more present than anchor 3's 'implicit' level.

Progressive Disclosure

Both inline references (references/sample-size-guide.md and references/test-templates.md) exist as real bundle files, are clearly signaled, and are one level deep with appropriate content splits. The ~80-line Growth Experimentation Program section (playbook template, velocity tables) is substantial inline detail that could live in a reference, keeping it below anchor 5.

Specificity

The description names the domain ('A/B test or experiment', 'growth experimentation program') with actions 'plan, design, or implement', but those verbs form one generic cluster and skip concrete capabilities like sample-size calculation or variant design. It exceeds a domain-only label (not 2) but does not list several distinct, specific actions (not 4).

Completeness

An explicit trigger clause is present ('When the user wants to...') and the what is embedded in it, so the missing-trigger cap of 3 does not apply. However, there is no standalone statement of the skill's own capabilities — the 'what' is expressed only through the user's desire — so it does not clearly and explicitly answer both what and when as anchor 5 requires.

Trigger Term Quality

'A/B test', 'experiment', and 'growth experimentation program' are natural phrases users would say when needing this skill. Coverage is good but misses common synonyms like 'split test' and 'multivariate', so it falls short of the comprehensive anchor 5.

Distinctiveness Conflict Risk

'A/B test' and 'growth experimentation program' define a clear niche with minimal conflict risk. The word 'experiment' is somewhat broad and overlaps with sibling skills it names (cro, analytics), keeping it just below anchor 5's 'minimal conflict risk'.