The content is lean and well-structured. It avoids explaining what architecture audits are or how Claude should think about code. Every section serves a distinct purpose—mode selection, workflow summary, format anchors, output contract—without redundancy or padding.

The skill provides concrete format anchors with exact markdown templates for finding blocks and improvement sequence items, a specific ordered workflow, explicit mode selection criteria, and a mandatory section list for the output. The references to external files for full templates and guardrails are appropriate delegation rather than vagueness.

The 5-step workflow summary is clearly sequenced with logical dependencies (build brief → select mode → inspect → collapse findings → sequence repairs). Step 5 explicitly handles ambiguity via 'Open Evidence Gaps' rather than guessing, which serves as a validation/feedback mechanism. The guardrails reference adds completion checks.

The SKILL.md serves as a clear overview with a well-organized reference table pointing to three one-level-deep files (audit-workflow.md, report-templates.md, guardrails-and-success.md), each with a clear purpose description. The inline content provides enough context (format anchors, workflow summary, output contract) to be useful without requiring immediate reference lookup.

Lists multiple specific concrete actions: builds a repo brief, selects auditor mode, inspects boundary/layering/dependency/composition/cohesion/testability risks, writes finding blocks, and sequences incremental refactors. Very detailed and actionable.

Clearly answers both 'what' (the full workflow from repo brief through finding blocks and refactor sequencing) and 'when' (explicit 'Use when...' clause listing multiple trigger scenarios). Both halves are well-developed.

Includes strong natural trigger terms: 'architecture audit', 'architecture review', 'repo-structure review', 'software architecture report', 'audit_report.md', 'structural issue findings', 'specialist-panel synthesis', 'multi-module systems'. Good coverage of terms users would naturally use.

Highly distinctive with a clear niche: architecture auditing with specific modes (single-auditor vs specialist-panel), specific risk categories (boundary, layering, dependency, etc.), and specific outputs (finding blocks, audit_report.md). Unlikely to conflict with general code review or other skills.