Conciseness

The body is largely efficient — a compact intro, runnable quick start, terse workflow steps, and high-value gotchas — with minor over-explanation a competent model mostly knows, e.g. "k-anonymity hides *which* record, but if every record in a class shares the same sensitive value ... the attribute leaks anyway" (workflow step 3). That matches the 4 anchor: efficient with a little trimming possible.

Actionability

The quick start is copy-paste executable with realistic fixtures, printed metric keys, and a second runnable call (run_reid_benchmark with suite/output args); workflow steps name exact functions, thresholds (k ≥ 5 or k ≥ 11), and concrete generalization moves (ZIP5 → ZIP3). This matches the 5 anchor of fully executable guidance covering the common cases.

Workflow Clarity

The 6-step workflow is clearly sequenced with a precondition gate ("only score QI risk once direct-identifier leakage is zero") and an explicit validation feedback loop in step 5 ("Generalize or suppress, then re-score ... re-run until k_min and linkage rate meet your documented threshold"). The mapping between step 1 and step 6 (documented threshold → memo contents) closes the loop, matching the 5 anchor.

Progressive Disclosure

No bundle files exist, so the skill is a single well-sectioned overview with no buried or nested references — everything sits at the right altitude except that a few pieces arguably belong in one-level-deep references, e.g. a memo template for step 6 or the "Standards & references" list as a reference file. Good structure with minor organization gaps matches the 4 anchor.

Specificity

The description lists multiple concrete actions — "quasi-identifier risk scoring (k-anonymity, l-diversity)", "empirical re-identification attack", "document residual risk in a defensible memo" — down to named functions (run_reid_attack / run_reid_benchmark). Coverage of the skill's scope is comprehensive, matching the 5 anchor.

Completeness

Both what and when are explicit: the "what" is concrete (risk scoring + attack + memo) and the "when" opens with "Use when the user needs HIPAA Expert Determination (45 CFR 164.514(b)(1)) support, asks whether a dataset is safe to release, ..." with several concrete trigger phrases. This matches the 5 anchor exactly.

Trigger Term Quality

Natural phrases a user would say are well covered: "HIPAA Expert Determination", "whether a dataset is safe to release", "singling-out via age/ZIP/dates", "very small risk". A few natural synonyms are missing (e.g. "anonymization"/"anonymized", "re-identification risk assessment"), which fits the 4 anchor rather than the comprehensive 5 anchor.

Distinctiveness Conflict Risk

A clear niche (re-identification risk / Expert Determination) with distinct triggers, but it sits alongside closely related skills it explicitly pairs with (auditing-deid-leakage, deidentifying-clinical-text), and a trigger like "is this dataset safe to release" could plausibly fire for those too — mostly distinct with minor overlap, matching the 4 anchor.