Conciseness

The body is lean, assumes competence, and explains no basic concepts; nearly all prose is directive. Minor trim candidates keep it below the top anchor: the marketing-flavored line "Generates comprehensive content briefs that guide blog writing for maximum impact on both Google rankings and AI citation platforms", and the 12-row template table whose selection criteria are already delegated to content-templates.md. It sits above anchor 3 because there is no genuinely unnecessary explanation — only small duplication.

Actionability

Guidance is fully executable for an instruction-only skill: concrete search strings ("[topic] study 2025 2026 data statistics research"), numeric parameters throughout (3-5 secondary keywords, top 3-5 pages, ~8-12 stat pool, 6-8 H2 sections), a complete fill-in output template, and an explicit save path ("briefs/[slug]-brief.md" with directory creation). No gaps remain between high-level direction and executable steps.

Workflow Clarity

The six-step sequence (Intake, Keyword Research, Template Recommendation, Competitive Analysis, Statistics Research, Generate, Save) is clearly ordered with defined substeps, and Step 4 embeds verification (record provenance, "Drop unverifiable statistics"). It falls short of anchor 5 because there is no explicit validation checkpoint after Step 5 (e.g., verifying the generated brief covers all sections and every stat has provenance before saving); it is not anchor 3 since checkpoints like source-dropping and URL validation are present.

Progressive Disclosure

References are well signaled: a "Reference documents:" list names five sibling files each with a one-line purpose ("template selection criteria", "channel-specific distribution tactics"), one level deep, plus template files under templates/[type].md. The top anchor is missed because the ~160-line brief output template and the 12-template table are inlined in SKILL.md rather than split into a reference file, making the body less of a pure overview.

Specificity

The description enumerates eight concrete deliverables — "target and secondary keywords", "search intent", "template choice", "competitor gaps from the live SERP", "sourced statistics to include", "section plan", "internal-link targets", and "distribution ideas" — giving comprehensive, non-generic coverage of what the brief contains. Anchor 4 ("minor gaps in coverage") does not apply since every major brief component is named.

Completeness

It explicitly answers both "what" ("Create a content brief for ONE planned post" with enumerated components) and "when" ("Use when the user says 'content brief', 'blog brief', 'SEO brief', 'article brief'") with concrete trigger phrases. This mirrors the anchor-5 example structure exactly.

Trigger Term Quality

It quotes the exact natural phrases a user would say — "content brief", "blog brief", "SEO brief", "article brief" — covering the synonym space for this task type. No file extensions are relevant here, so coverage matches the top anchor.

Distinctiveness Conflict Risk

The negative boundary clause — "Not a skeleton only (blog-outline), a multi-post plan (blog-strategy, blog-calendar, blog-cluster), or the article itself (blog-write)" — explicitly disambiguates four sibling skills, giving a clear niche with minimal conflict risk.