Conciseness

The body is dense with CLI-specific knowledge Claude would not know (DeferredAddKeys, raw-set activeTab ordering, SUMPRODUCT array-formula failures) and teaches no generic Excel concepts, so it broadly assumes competence. Minor over-explanation remains: the cachedValue-staleness rule is explained three times (Requirements, Gate 8 intro, D-16) and the chart-title-width rule appears in Design Ideas, Gate 2, and its comment, so it sits just below the lean anchor 5.

Actionability

Fully executable throughout: a phased Quick Start with copy-paste bash, concrete prop values ('--prop highPoint=true --prop highMarkerColor=FF0000'), worked arithmetic ('width ≈ ceil((visible_chars + 2) × 1.3)'), and complete gate scripts including the col_num helper. Common cases (revenue trend dashboard, print delivery, CF rule types) are all covered by specific commands.

Workflow Clarity

Clear sequencing with explicit validation: Quick Start is broken into phases 'so a single failed phase is obvious', Reference states the build order ('raw-set activeTab LAST after all sheets exist'), and the QA section is a REQUIRED delivery gate with eight count-then-if checks, per-failure REJECT messages, an error-recovery loop ('If anything fails, fix at source, re-run the full cycle'), and mandatory fallbacks when view html is blocked. This matches the anchor-5 validate→fix→retry pattern.

Progressive Disclosure

Structure and navigation are good (clear sections, explicit deferral of schemas to 'officecli help' and hard rules to the officecli-xlsx parent skill), but the ~400-line body inlines substantial material that clearly belongs in separate reference files — the 17-row Known Issues table and ~120 lines of copy-paste gate scripts. With no bundle files at all, this is 'some structure, content that should be separate is inline', not above the anchor-3 line; not below 3 because what external deferral exists is clearly signaled and one level deep.

Specificity

The description lists multiple concrete actions with comprehensive coverage: 'build a multi-element Excel dashboard — Dashboard sheet on open, multiple formula-driven KPI cards, multiple charts, sparklines, and conditional formatting — from CSV or tabular input' plus a concrete output contract ('Output is a single .xlsx'). Every capability named is specific and checkable; not below 4 because coverage of the skill's surface (inputs, elements, output) is complete.

Completeness

Both questions are answered explicitly: what ('build a multi-element Excel dashboard... Output is a single .xlsx') and when ('Trigger on: dashboard, KPI dashboard, ...' plus an explicit DO NOT INVOKE list routing three non-matching asks to sibling skills). This matches the anchor-5 example's structure of concrete what plus concrete trigger phrases, and exceeds it with explicit anti-triggers.

Trigger Term Quality

Good keyword coverage with natural variations users would say: 'dashboard', 'KPI dashboard', 'analytics dashboard', 'executive dashboard', 'metrics dashboard', 'CSV to dashboard', 'data visualization'. A few natural terms are missing from the trigger list (e.g., 'Excel dashboard' appears only in the capability sentence, and '.xlsx' / 'build a dashboard' phrasings), so it falls just under the comprehensive synonym+extension anchor 5.

Distinctiveness Conflict Risk

The description actively disambiguates against the three most confusable neighbors ('DO NOT invoke for: a single budget tracker / one-sheet CSV-with-formatting (use xlsx), a 3-statement / DCF / LBO financial model (use financial-model), a weekly report with ≤ 1 chart and < 10 rows (use xlsx)') and declares its scene-layer relationship to officecli-xlsx. Minimal conflict risk; clearly a distinct niche.