threejs-materials
Three.js materials - PBR, basic, phong, shader materials, material properties. Use when styling meshes, working with textures, creating custom shaders, or optimizing material performance.
68
83%
Does it follow best practices?
Impact
—
No eval scenarios have been run
Passed
No known issues
Quality
Discovery
89%Based on the skill's description, can an agent find and select it at the right time? Clear, specific descriptions lead to better discovery.
This is a solid skill description that clearly identifies its niche (Three.js materials) and provides explicit trigger guidance. Its main weakness is that it lists material types rather than describing concrete actions the skill enables. Adding action verbs like 'create', 'configure', 'debug', or 'apply' would strengthen the specificity dimension.
Suggestions
Rewrite the first clause with concrete action verbs, e.g., 'Creates, configures, and debugs Three.js materials including PBR, basic, phong, and custom shader materials.'
| Dimension | Reasoning | Score |
|---|---|---|
Specificity | Names the domain (Three.js materials) and lists material types (PBR, basic, phong, shader materials, material properties), but doesn't describe concrete actions like 'create', 'configure', or 'debug'. It's more of a topic listing than an action-oriented description. | 2 / 3 |
Completeness | Clearly answers both 'what' (Three.js materials - PBR, basic, phong, shader materials, material properties) and 'when' with an explicit 'Use when' clause covering styling meshes, textures, custom shaders, and optimizing material performance. | 3 / 3 |
Trigger Term Quality | Includes strong natural keywords users would say: 'Three.js', 'materials', 'PBR', 'phong', 'shader', 'textures', 'meshes', 'custom shaders'. These cover a good range of terms a developer working with Three.js materials would naturally use. | 3 / 3 |
Distinctiveness Conflict Risk | Highly specific to Three.js materials, which is a clear niche. The combination of 'Three.js' with specific material types (PBR, phong, shader) makes it very unlikely to conflict with other skills, even other Three.js skills focused on geometry, lighting, or animation. | 3 / 3 |
Total | 11 / 12 Passed |
Implementation
77%Reviews the quality of instructions and guidance provided to agents. Good implementation is clear, handles edge cases, and produces reliable results.
This is a strong, highly actionable Three.js materials reference with excellent executable code examples and a well-organized overview table for material selection. Its main weakness is length — the exhaustive property listings for every material type make it more of an API reference dump than a concise skill, and the MeshPhysicalMaterial and common properties sections could be split into separate files to improve token efficiency.
Suggestions
Move exhaustive property listings (MeshPhysicalMaterial's full property list, common material properties section) into a separate REFERENCE.md file, keeping only the most commonly used properties and practical examples inline.
Trim the common material properties section to only the 5-6 most frequently needed properties (transparent, opacity, side, depthTest, blending) with a reference link for the full list.
| Dimension | Reasoning | Score |
|---|---|---|
Conciseness | The content is mostly efficient with inline comments serving as documentation, but it's quite long (~400 lines) and includes exhaustive property listings for every material type that border on API reference documentation. Some properties (like stencil operations, polygon offset) are rarely needed and could be in a separate reference file. However, the inline comments are terse and useful. | 2 / 3 |
Actionability | Every material type has fully executable, copy-paste ready code examples with real property values and inline comments explaining parameters. Practical examples like glass material and car paint are excellent. The ShaderMaterial section includes complete vertex and fragment shaders with animation loop update patterns. | 3 / 3 |
Workflow Clarity | For a reference-style skill about material types, the workflow is clear: the overview table helps select the right material, each section provides complete configuration, and the performance tips section gives a clear hierarchy (Basic > Lambert > Phong > Standard > Physical). The material cloning section clearly notes when needsUpdate is required. This is a single-task reference skill where the workflow is material selection and configuration, which is unambiguous. | 3 / 3 |
Progressive Disclosure | The skill has a clear overview table and 'See Also' references to related skills, which is good. However, the body itself is very long with exhaustive property listings for MeshPhysicalMaterial and common properties that could be split into a separate reference file. The content would benefit from keeping only the most common properties inline and linking to a detailed API reference. | 2 / 3 |
Total | 10 / 12 Passed |
Validation
90%Checks the skill against the spec for correct structure and formatting. All validation checks must pass before discovery and implementation can be scored.
Validation — 10 / 11 Passed
Validation for skill structure
| Criteria | Description | Result |
|---|---|---|
skill_md_line_count | SKILL.md is long (521 lines); consider splitting into references/ and linking | Warning |
Total | 10 / 11 Passed | |
- Repository
- cloudai-x/threejs-skills
- Commit
b1c6230
- Reviewed
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