Conciseness

Generally efficient with good use of tables and code examples. Minor over-explanation in sections like 'When Answering Questions' which states things Claude already knows (e.g., 'Makepad shaders use Rust-like syntax'). The 'IMPORTANT: Documentation Completeness Check' section adds some procedural overhead but is arguably necessary for correctness.

Actionability

Provides multiple concrete, copy-paste ready code examples covering common patterns (basic shader, rounded rect, gradient, circle). The Sdf2d quick reference and built-in functions tables are actionable. Minor gap: no example of vertex shaders, custom draw structs in Rust, or how to define custom uniforms beyond simple color properties.

Workflow Clarity

The 'When Writing Code' section provides a clear checklist of rules. The documentation completeness check has a reasonable fallback workflow. However, there's no explicit validation or error-handling workflow for shader development (e.g., what happens when a shader fails to compile, how to debug). Since shaders aren't destructive batch operations, the missing feedback loop cap doesn't apply, but a simple skill like this could benefit from a brief troubleshooting note.

Progressive Disclosure

Good structure with clear references to external files (references/*.md, _base/ directory patterns). The table of advanced patterns is well-organized. However, since no bundle files were provided, we can't verify the referenced paths exist. The skill keeps inline content to key patterns and tables while pointing to detailed docs, which is appropriate. Minor issue: the community/ reference is vague with no description of what's there.

Specificity

Names the domain ('Makepad shader system') but provides no concrete actions. There is no description of what the skill actually does—no verbs like 'generates', 'writes', 'debugs', or 'explains'. It only lists trigger terms without describing capabilities.

Completeness

The 'when' is explicitly addressed with trigger terms, but the 'what' is almost entirely missing—there is no description of what the skill does beyond identifying the domain as 'Makepad shader system'. The lack of a clear 'what' caps this score low.

Trigger Term Quality

Excellent coverage of natural trigger terms including specific API names (Sdf2d, draw_bg, draw_quad), domain terms (shader, glsl, sdf, gpu, pixel), and even Chinese-language synonyms (着色器, shader 语法, 绘制). Users searching for Makepad shader help would likely use one of these terms.

Distinctiveness Conflict Risk

The description targets a very specific niche—Makepad's shader system—with highly distinctive trigger terms like 'Sdf2d', 'draw_bg', and 'draw_quad' that are unlikely to conflict with any other skill.