Conciseness

The body is information-dense with almost no explanation of concepts Claude already knows — every table and command earns its place — but the opening paragraph largely restates the frontmatter description and the file-type/threshold tables duplicate material already in the reference files, leaving minor trimmable content short of the lean level-5 anchor.

Actionability

Concrete, mostly executable guidance throughout: exact git commands ('git diff --name-only HEAD', 'git diff -U0'), named MCP tools with parameters ('severity_threshold: "medium"', 'all_projects: true'), hunk-range parsing ('@@ -X,Y +A,B @@'), and a copy-ready '.snyk' policy YAML. The gap is 'Cache results keyed by file + content_hash with a 12-hour TTL', which specifies no storage mechanism, fitting level 4 rather than fully executable level 5.

Workflow Clarity

Five clearly sequenced phases (change detection → scans → filter → report/decision → metrics) with explicit block decision logic and genuine feedback loops: 'Retry once with smaller scope' for timeouts, auth error retry via 'snyk_auth', and suppress-then-'re-run to verify' for false positives. The skill is explicitly non-destructive ('Never modify code, only report findings'), so the batch-operation cap does not apply.

Progressive Disclosure

The body is well-sectioned, but the two actual bundle files (references/severity-thresholds.md and references/supported-languages.md) are never mentioned anywhere in the body — instead condensed duplicates of both (the File Type → Scan Type table and the severity mode table) are inlined, and content such as Audit Mode exists only in the unreferenced file. This matches the level-3 anchor: references present but not clearly signaled, content that should be separate is inline.

Specificity

Lists several concrete actions ('Intelligently detects changes, runs appropriate scans (SAST, SCA, IaC), filters to only NEW issues') with comprehensive scope, but buzzword padding ('Intelligently', 'prevents vulnerabilities at the source') keeps it just below the level-5 anchor of clean comprehensive coverage.

Completeness

Explicitly answers both what ('detects changes, runs appropriate scans (SAST, SCA, IaC), filters to only NEW issues') and when, with a concrete five-item 'Use this skill when' trigger list — a clear match for the level-5 anchor requiring concrete trigger phrases.

Trigger Term Quality

Good natural trigger phrases users would actually say ('scan for security issues', 'check my changes', 'Before committing changes'), but misses common synonyms like 'vulnerability scan', 'security audit', or 'security review', fitting the level-4 'good coverage, a few natural terms missing' anchor rather than comprehensive level 5.

Distinctiveness Conflict Risk

The proactive new-code security scanning niche is mostly distinct with specific triggers ('secure at inception', 'proactive scan'), but generic triggers like 'check my changes' and 'Before committing changes' carry minor overlap risk with code-review and commit-message skills, matching level 4 rather than the minimal-conflict level 5.