Conciseness

The body is almost entirely operational (commands, captured fields, rule severities, error actions) with no SEO-101 padding Claude already knows, but there is avoidable duplication: the Commands table repeats each invocation that the per-command Execution blocks give again, the "Git for your SEO" tagline appears twice (title and line 1), and the hard-coded date "(April 2026)" in the heading is time-sensitive token spend not placed in a deprecation section. This fits score 4 (efficient with minor instances that could be trimmed) better than 5, where every token would earn its place.

Actionability

Every command is given as a copy-paste-ready invocation with real flags — "${CLAUDE_PLUGIN_ROOT}/scripts/claude-seo" run drift_baseline.py <url> --skip-cwv, drift_compare.py <url> --baseline-id 5, drift_history.py <url> --limit 10 — plus expected JSON outputs, a report-generation step, and a concrete per-scenario error table. This matches the score-5 anchor (fully executable, common cases covered); score 4 would require gaps in coverage or non-executable examples, which are absent.

Workflow Clarity

Each command has a numbered step sequence with front-loaded validation ("Validate URL (SSRF protection via google_auth.validate_url())") and a thorough error-handling table with per-scenario actions. However, mid-sequence checkpoints are implicit rather than in the step list — e.g., the compare workflow doesn't state to halt if the fetch fails before running the 17 rules, and there is no explicit validate-retry loop — which fits score 4 (clear sequence, most checkpoints, minor validation gaps) rather than 5.

Progressive Disclosure

The body is a well-sectioned overview (commands, captured elements, severity summary, storage, workflows) and correctly defers the full rule set to a clearly signaled, one-level-deep reference: "Load references/comparison-rules.md for the full rule set with thresholds, recommended actions, and cross-skill references" — and that file exists in the bundle with no further nesting. This matches the score-5 anchor (clear overview, well-signaled one-level-deep references, easy navigation).

Specificity

The description lists multiple concrete actions — "capture baselines of SEO-critical elements, detect changes, and track regressions over time" and "baseline, diff, and track changes to your on-page SEO" — with comprehensive coverage of the skill's function. It matches the score-5 anchor (multiple specific concrete actions) and is well above score 4, whose coverage would show minor gaps; the only nit is slight repetition of the same actions, not missing ones.

Completeness

It explicitly answers both "what" (capture baselines, detect changes, track regressions) and "when" ("Use when user says 'SEO drift', 'baseline', ... or 'deployment check'") with concrete trigger phrases. This is a direct match for the score-5 anchor; score 4 would mean the 'when' clause was present but less explicit, which it is not. Voice is third-person, so no penalty applies.

Trigger Term Quality

Trigger phrases include "SEO drift", "baseline", "track changes", "did anything break", "SEO regression", "compare SEO", "before and after", "monitor SEO changes", and "deployment check" — natural user phrasings with synonym-level coverage. It clearly fits the score-5 anchor (comprehensive natural terms including synonyms); score 4 would require several missing common variations, which is not the case.

Distinctiveness Conflict Risk

The SEO niche is clear ("SEO drift", "SEO regression", "compare SEO"), but generic triggers like "baseline", "track changes", "before and after", and "deployment check" could plausibly fire for non-SEO diff/deployment skills, creating minor overlap risk. This fits the score-4 anchor (mostly distinct, minor overlap with closely related skills) rather than 5 (minimal conflict risk), because several trigger terms are domain-agnostic.