Conciseness

The body is lean and directive throughout — 'Do not read PDF binary files with fs.read', 'Render only relevant pages', 'Cite page numbers when using PDF evidence' — with no explanation of concepts Claude already knows and only brief, load-bearing rationales ('text extraction may omit or reorder visual facts'). Matches the 5 anchor: every token earns its place.

Actionability

Concrete, named tool calls (pdf.search, pdf.read, pdf.render_pages), specific parameters (dpi, suggested_batches, continuation_calls), and example search queries ('package, mechanical drawing, dimensions, recommended footprint, pinout') make the guidance mostly executable. It stops short of the 5 anchor's copy-paste-ready bar because no literal call syntax or argument example (e.g., a page-range form) is shown.

Workflow Clarity

A clear 5-step decision sequence (search when pages are unknown, read for bounded text, render when visuals matter) with explicit error-recovery feedback loops: 'Broaden or refine the query once before concluding', 'render fewer pages at a higher dpi', and following continuation_calls on partial results. No destructive or batch operations, so the validation cap does not apply; this matches the 5 anchor's clear sequence with feedback loops.

Progressive Disclosure

The skill is under 50 lines with no external references needed and is well organized into Workflow, Rules, and Common Patterns sections. Per the rubric's simple-skill guideline, this earns a 5 with just well-organized sections; the body has no monolithic inlining that would push it to a lower anchor.

Specificity

Quotes 'exact text extraction, page-specific review, visual inspection of embedded images/diagrams/scans' plus 'datasheet figures, tables' — several concrete actions with specific objects. It falls short of the 5 anchor only because the search/navigation capability central to the skill's workflow is unreflected, a minor coverage gap; it clearly exceeds the 3 anchor's '1-2 concrete actions.'

Completeness

An explicit 'Use when...' clause with concrete triggers ('uploaded or project PDF files', 'datasheet figures', 'layout-sensitive evidence') answers when, and the stated capabilities — exact text extraction, page-specific review, visual inspection — explicitly answer what. This matches the 5 anchor rather than the 4 anchor, whose 'when' would need to be more explicit or specific.

Trigger Term Quality

Natural user phrases are present: 'PDF files', 'text extraction', 'datasheet', 'tables', 'scans', 'page'. The '.pdf' extension and casual 'PDFs' variant are missing, matching the 4 anchor ('good keyword coverage; a few natural terms missing') rather than the comprehensive 5 anchor.

Distinctiveness Conflict Risk

A clear 'PDF files' niche with distinctive triggers (datasheets, scans, package-like figures, layout-sensitive evidence) and minimal conflict risk with adjacent document skills; matches the 5 anchor ('clear niche with distinct triggers').