Lists multiple specific concrete actions: probing for hardcoded secrets, injection surfaces, unguarded routes, business logic flaws, and platform-specific weaknesses. Also enumerates specific technology stacks across backend, frontend, and mobile.

Clearly answers both 'what' (probe for hardcoded secrets, injection surfaces, unguarded routes, business logic flaws, platform-specific weaknesses across multiple tech stacks) and 'when' (explicit 'Use when performing security audits, vulnerability scans, secrets detection, or penetration testing').

Includes strong natural trigger terms users would say: 'security audits', 'vulnerability scans', 'secrets detection', 'penetration testing', plus technology-specific terms like 'Node', 'Go', 'React', 'iOS', 'Android', 'Flutter'. Good coverage of terms a user would naturally use.

Occupies a clear niche in security auditing and vulnerability analysis. The combination of security-specific actions and the broad but well-defined technology scope makes it unlikely to conflict with general code review or development skills.

Generally efficient with good use of tables and bullet points, but some sections are thin pointers to reference files without enough inline substance, while others (like the scoring table and anti-patterns) add useful but somewhat verbose context. The skill mostly avoids explaining things Claude already knows.

Section 4 and 6 provide concrete, executable commands (grep patterns, npm audit, etc.), but sections 1, 2, 3, 5, and 7 delegate entirely to reference files that are not provided in the bundle, making the skill itself incomplete for execution. Section 8 gives useful heuristics but lacks executable code examples.

The numbered sections provide a clear sequence of audit steps, and the scoring table adds useful prioritization. However, there are no explicit validation checkpoints, feedback loops, or error recovery steps — critical for a security audit workflow where findings should trigger immediate remediation actions (the CAUTION note is close but not a workflow step).

The skill references multiple external files (references/implementation.md, references/mobile-audit.md, references/REMEDIATION.md) with clear signaling, which is good structure. However, no bundle files were provided, meaning these references are unverifiable. Additionally, too many sections (1, 2, 3, 5) are almost entirely delegated to a single implementation.md file, making the main skill feel hollow without those references.