The body is mostly lean and procedural, but the image-generation backend-resolution prose and the repeated ⛔ hard-stop warnings (e.g., the elaborated "Never substitute SVG" and "Never repair rendered text" paragraphs) could be tightened; it is above level 1 because it avoids explaining concepts Claude already knows and is not padded with generic background.

Provides concrete, executable guidance throughout — exact file-naming conventions (NN-{type}-{slug}.md), EXTEND.md path tables, an AskUserQuestion question/option matrix, and an output-directory mapping table — which per the scoring notes satisfies actionability for an instruction-only skill without requiring code.

A clear 6-step sequenced workflow with explicit validation gates ("⛔ BLOCKING: Prompt files MUST be saved before ANY image generation", confirm-before-generate, retry-once-on-failure) provides the feedback loops the rubric requires for batch operations; it is not level 2 because checkpoints are explicit rather than implicit.

The SKILL.md is a well-signaled overview with one-level-deep references — all referenced files (workflow.md, styles.md, style-presets.md, prompt-construction.md, codex-imagegen.md, usage.md, config/first-time-setup.md) exist as real bundle files — and content is appropriately split across them rather than nested multiple levels.

Quotes three concrete actions — "Analyzes article structure", "identifies positions requiring visual aids", "generates illustrations with Type × Style × Palette three-dimension approach" — matching the multiple-specific-actions anchor rather than the single-action level 2.

Explicitly answers both what (analyze structure, identify positions, generate illustrations) and when via the "Use when..." clause with concrete triggers, matching the both-what-and-when anchor; it is not level 2 because the when is explicit, not merely implied.

Provides natural phrases a user would say — "illustrate article", "add images", "generate images for article", and the Chinese "为文章配图" — giving good coverage of common variations rather than only one keyword.

The article-illustration niche with Type × Style × Palette framing and article-specific triggers is clearly distinguishable from generic image-generation skills and unlikely to trigger for the wrong skill.