Conciseness

The body is largely efficient and assumes Claude's competence ('The LLM knows the ACMG criteria codes and combination rules') while contributing genuinely non-obvious calibration (ClinGen HI/TS thresholds, >=70% reciprocal overlap, >=1% frequency triggering BA1). Minor redundancy keeps it from level 5: tools are listed twice (per-phase and again in 'Required Tools Reference'), and the >=1%/BA1 and HI-score interpretation rules from the reasoning section are restated in Phases 3-4. It is clearly above level 3, which expects unnecessary explanation of things Claude already knows — there is none.

Actionability

Guidance includes concrete tool names per phase, numeric thresholds, and an explicit output filename convention, but it stops short of executable detail: no example tool queries are shown, and the key operational content — scoring breakdowns, ACMG evidence code tables, implementation 'pseudocode' (itself penalized), and the report template — is deferred to files (CLASSIFICATION_GUIDE.md, ANALYSIS_PROCEDURES.md, REPORT_TEMPLATE.md) that are not present in the bundle. This matches 'Some concrete guidance but incomplete; missing key details' rather than level 4's 'minor gaps'.

Workflow Clarity

The seven phases are clearly sequenced, each with a stated goal and assigned tools, and the 'SV Pathogenicity Reasoning (Start Here)' section frames the analysis before execution. Checkpoints exist but are implicit rather than explicit validation steps (e.g., 'check parental genotypes if available', 'assess breakpoint precision' are mentioned but no verify-then-proceed loop is defined), matching level 4's 'most checkpoints present; minor validation gaps' rather than level 5's explicit validation with feedback loops.

Progressive Disclosure

References are well signaled and one level deep (inline per-phase pointers plus a dedicated 'Reference Files' section), but the four referenced files do not exist in the bundle — there are no references/ or other bundle directories — so the deferred content (classification tables, procedures, report template, examples) is unreachable and critical detail is effectively missing rather than appropriately split. That fits level 3 ('could be better organized... content that should be separate is inline/ineffective') better than level 4's 'most content is appropriately placed', since the split only works if the target files exist.

Specificity

The description lists multiple concrete actions — 'Applies ACMG-adapted criteria with ClinGen HI/TS dosage scores, gnomAD frequencies, and ClinVar evidence' and 'Produces 5-tier classification with explicit per-criterion evidence' — covering the domain comprehensively with named data sources and a concrete output. It matches the anchor 'Lists multiple specific concrete actions; comprehensive coverage' and exceeds the level-4 anchor, which expects minor coverage gaps.

Completeness

It explicitly answers both questions: what it does ('Applies ACMG-adapted criteria... Produces 5-tier classification with explicit per-criterion evidence') and when to use it ('Use for clinical genomics SV review, dosage-sensitivity assessment, breakpoint analysis, and CNV pathogenicity calls'). This matches the level-5 anchor with a concrete 'Use for' trigger clause; level 4 would require the 'when' to be less explicit.

Trigger Term Quality

Natural user phrasing is well covered: 'structural variant (SV)', 'deletions, duplications, inversions, translocations', 'CNV pathogenicity calls', 'dosage-sensitivity assessment', 'breakpoint analysis', and 'clinical genomics SV review' include the abbreviation, the spelled-out forms, and the question users actually ask ('is this CNV pathogenic'). This matches the level-5 anchor's comprehensive synonym coverage; only trivially distant variants (e.g., 'copy number variation' spelled out) are missing, which is not enough to drop to 4.

Distinctiveness Conflict Risk

The SV/CNV scope ('deletions, duplications, inversions, translocations, complex rearrangements', 'CNV pathogenicity calls') carves a clear niche with mostly distinct triggers. However, a user asking generically to 'interpret this variant' or 'assess pathogenicity' without specifying variant type could plausibly trigger both this and a general variant-interpretation skill (a sibling SNV skill exists per the body), so 'minor overlap risk with closely related skills' (level 4) fits better than level 5's 'minimal conflict risk'.