Conciseness

The body is dense and expert-level with no padding or basic-concept explanation — every line carries non-obvious domain facts (filer thresholds, sample-size conventions, deficiency definitions). However, date-stamped figures are pervasive outside any quarantine: the 'May 19, 2026 proposal', '279 of 3,502' KPMG/Audit Analytics statistic, 'Baker Tilly, through Apr 2025', and 'PCAOB 2025 inspection priorities'. This matches 'efficient; minor instances… that could be trimmed' (4) rather than the every-token-earns-its-place anchor (5), given the time-sensitivity penalty.

Actionability

For an instruction-only skill the guidance is fully executable: exact filer thresholds ('$75M–$700M public float AND ≥$100M revenues'), sample-size conventions ('daily→25, weekly→5, monthly→2'), a complete RCM column specification, and a task→output 'How to Respond' table. These are copy-paste-ready rules covering the common cases, matching the level-5 anchor; there are no gaps that would drop it to 4.

Workflow Clarity

All five core workflows are present and sequenced (e.g. deficiency ladder 'facts → likelihood/magnitude → compensating controls → aggregation → classification'; remediation 'root cause → redesign → re-test window → validation testing → conclusion'), and remediation includes an explicit timing checkpoint ('a control fixed in December can't demonstrate quarterly operation'). But the workflows are compressed prose summaries whose validation checkpoints are often implied, and error-recovery paths (what to do when a sample fails or the auditor rejects a benchmark) are absent from the body — matching 'clear sequence with most checkpoints present; minor validation gaps' (4) rather than the explicit-validation-and-feedback-loops anchor (5).

Progressive Disclosure

The ~65-line body is a genuine overview (domains, legal frame, workflow summaries, response formats) and hands detail to three clearly labeled one-level-deep references ('full control catalog per domain with test procedures and evidence', 'evaluation framework, aggregation, examples by severity', 'scoping methodology, RCM template, SOC 1/CUEC handling, IPE/EUC') that all exist in the bundle, are one level deep, and do not nest further references. This matches the well-signaled one-level-deep anchor exactly.

Specificity

Lists multiple concrete actions — 'scoping in-scope systems from the financial statements, designing risk-and-control matrices (RCMs), writing control narratives and test scripts, evaluating deficiencies… drafting remediation plans' — plus all four ITGC domains and named standards. This matches the anchor for comprehensive concrete-action coverage; the level-4 anchor (minor gaps) fits worse since every major domain deliverable is named.

Completeness

Both questions are answered explicitly: the 'what' (advisor covering the four domains plus RCMs, narratives, test scripts, deficiency evaluation, remediation, filer status, IPO timelines, COSO alignment) and an explicit 'when' with concrete trigger phrases. This matches the anchor 'clearly and explicitly answers both what AND when'; level 4's 'when could be more explicit' does not apply.

Trigger Term Quality

The trigger clause 'Use this skill whenever a user mentions SOX, ITGC, IT general controls, 404(a)/404(b), ICFR, material weakness, user access reviews, segregation of duties in IT, change management controls… SOX testing or walkthroughs, PCAOB audits' covers both acronyms and their spelled-out synonyms, matching the comprehensive-synonyms anchor rather than the 'a few natural terms missing' anchor at 4.

Distinctiveness Conflict Risk

A clear niche (SOX ITGC compliance) with distinct domain-specific triggers (404(a)/404(b), ICFR, PCAOB audits, user access reviews) that no generic finance or audit skill would claim, matching the minimal-conflict-risk anchor rather than the 'minor overlap with closely related skills' anchor at 4.