Conciseness

The body is dense with domain-specific facts Claude cannot reliably recall (exact deadlines, article numbers, penalty amounts, SRP filing workflow) presented as tables and lists rather than padded prose. Not a 5 because the Art. 14 reporting timeline and SRP details are stated twice (Workflow 4 item 5 and the 'Reporting Is LIVE' section), and the Annex I lists and penalties table duplicate content in the reference files.

Actionability

For an instruction-only advisory skill the guidance is fully actionable: five workflows each with 'When to use' plus numbered steps, a copy-paste output format template in Workflow 1, exhaustive Annex I checklists to map against, and exact deadlines ('24 hours', '72 hours', '14 days'), penalty amounts ('€15 million or 2.5% of global annual turnover'), and a concrete SRP filing workflow. This is the instruction-skill equivalent of copy-paste ready commands.

Workflow Clarity

Each workflow has a clearly labeled trigger ('When to use'), a numbered sequence, and explicit decision logic (Workflow 1 steps 3–5: check Annex III, then Annex IV, else Default). Not a 5 because there are no explicit verification checkpoints (e.g., 'confirm classification against the Annex III list in references/essential-requirements.md'), though the advisory, non-destructive context makes the destructive-operation cap inapplicable.

Progressive Disclosure

Both referenced files exist (references/essential-requirements.md and references/conformity-assessment.md, each ~270–320 lines with their own tables of contents) and are clearly signaled up front with descriptions of their contents; references are one level deep. Not a 5 because the body inlines substantial content that is duplicated in the reference files (full Annex I Part I/II lists, penalties table, support period rules), rather than keeping the body a lean overview.

Specificity

Lists multiple concrete capabilities — 'gap analysis, product classification (Default / Class I / Class II), conformity assessment route selection, CE marking, SBOM requirements, vulnerability and incident reporting to ENISA/CSIRTs, support period obligations, and manufacturer/importer/distributor duties' — giving comprehensive coverage of the skill's actions. Not below the 4 anchor because no meaningful capability area of the domain is left unnamed.

Completeness

Explicitly answers 'what' ('Expert EU Cyber Resilience Act (CRA) advisor for Regulation (EU) 2024/2847 — mandatory cybersecurity and vulnerability handling requirements for all products with digital elements (PDEs) sold in the EU') and 'when' ('Use this skill for...' and 'Trigger for...') with concrete trigger phrases. Matches the 5 anchor exactly; the 4 anchor's 'when could be more explicit' does not apply given the dedicated trigger sentence.

Trigger Term Quality

Trigger terms are natural user phrasings with synonym coverage: 'EU CRA, Cyber Resilience Act, PDE compliance, Annex I requirements, SBOM EU, CE marking cybersecurity, or connected product security EU' — both the acronym and full regulation name plus several distinct phrasings a user would actually say. File extensions are not applicable to this regulatory domain, so the 5 anchor's 'synonyms and file extensions' bar is met by its synonym coverage.

Distinctiveness Conflict Risk

A clear niche (EU CRA product cybersecurity regulation) with domain-specific triggers — no realistic confusion with adjacent regimes like GDPR, NIS2, or the EU AI Act, which the body even distinguishes explicitly. Distinct, low-conflict triggers place it at the 5 anchor rather than the 4 anchor's 'minor overlap risk with closely related skills'.