Conciseness

'Check' and 'Code Review' give nearly identical audit instructions ('Audit the form fields, API request bodies, and client-side storage keys...' vs 'Review form components, fetch/axios calls, and storage utilities... Flag any field or key that is collected but not read'), and the opening GDPR rationale is motivation Claude already knows — mostly efficient but could be tightened, anchor 3 rather than anchor 4's 'minor instances'.

Actionability

Concrete, executable direction for an instruction-only skill: named audit targets, a precise criterion ('collected but not read by an active feature'), and specific remediation ('Replace raw personal identifiers in analytics and logs with pseudonymous IDs and define a retention window for each stored value'). The minor gap — no inline example of a violation before the reference pointer — keeps it below anchor 5.

Workflow Clarity

A clear Check → Fix → Explain sequence with the audit acting as an explicit pre-fix gate; minor validation gaps remain — no post-fix verification step is surfaced in the body (it lives in references/rule.md), and the redundant 'Code Review' section muddies where it fits in the sequence — so anchor 4 rather than 5.

Progressive Disclosure

A ~30-line overview with a clearly signaled, one-level-deep reference ('For full implementation details, code examples, and framework-specific guidance, see references/rule.md'); the file exists and holds exactly those details with no nested references, so content is appropriately split with easy navigation.

Specificity

Names the domain and 1-2 concrete actions — 'reviewing form components, API payloads, or client-side storage' and 'identify fields that are collected but not consumed by a stated feature' — but coverage is not comprehensive: the fix/anonymise and analytics-inspection actions from the body are absent, so it matches anchor 3 rather than anchor 4's 'several specific actions'.

Completeness

Explicitly answers both what ('identify fields that are collected but not consumed by a stated feature') and when ('Use when reviewing form components, API payloads, or client-side storage') with a concrete 'Use when' trigger clause, matching the anchor-5 example structure; not score 4 because the 'when' is already explicit and specific rather than improvable.

Trigger Term Quality

Good natural keywords users would say when reviewing frontend code ('form components', 'API payloads', 'client-side storage', 'fields'), but it misses common variations and synonyms — 'PII', 'personal data', 'privacy', 'GDPR', 'data minimisation', 'localStorage', 'cookies' — placing it between anchors 3 and 4, noticeably above the midpoint.

Distinctiveness Conflict Risk

The purpose qualifier ('collected but not consumed by a stated feature') carves out a distinct niche, but the trigger surface ('reviewing form components', 'API payloads') overlaps with generic code-review and API-design skills — mostly distinct with minor overlap risk, anchor 4 rather than anchor 5's minimal-conflict niche.