threejs-lighting

Three.js lighting - light types, shadows, environment lighting. Use when adding lights, configuring shadows, setting up IBL, or optimizing lighting performance.

Quality

83%

Does it follow best practices?

Impact

—

No eval scenarios have been run

Securityby

Passed

No known issues

Quality

Content

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 comprehensive and highly actionable Three.js lighting reference with excellent executable code examples covering all light types, shadow configuration, IBL, and common setups. Its main weakness is length - at ~350 lines it's a monolithic reference document that could benefit from splitting detailed per-light-type documentation into a separate reference file while keeping the SKILL.md as a concise overview with the quick start, table, and key patterns.

Suggestions

Split detailed per-light-type API documentation (AmbientLight through RectAreaLight sections) into a separate LIGHT_TYPES.md reference file, keeping only the overview table and quick start in SKILL.md.

Remove trivial descriptions Claude already knows (e.g., 'Like a light bulb', 'Illuminates all objects equally. No direction, no shadows.') to improve conciseness.

Dimension	Reasoning	Score
Conciseness	The content is mostly efficient with good code examples and a useful reference table, but it's quite long (~350 lines) and includes some unnecessary commentary (e.g., 'Like a light bulb', 'Like a flashlight or stage light') and inline property listings that Claude already knows. The sheer volume of light type documentation could be split into a reference file.	2 / 3
Actionability	Excellent actionability throughout - every light type has fully executable, copy-paste ready code examples with correct constructor signatures, property access patterns, and complete shadow configuration. The common lighting setups section provides ready-to-use recipes.	3 / 3
Workflow Clarity	The shadow setup section provides a clear 3-step sequence (enable on renderer → enable on light → enable on objects). For a reference-style skill covering light types, the workflows are appropriately clear. The performance tips section provides actionable optimization guidance. No destructive/batch operations require feedback loops here.	3 / 3
Progressive Disclosure	The skill is quite long and monolithic - detailed API reference for every light type is inline rather than split into a separate reference file. The 'See Also' cross-references at the bottom are good, but the body itself would benefit from moving detailed shadow configuration and light type specifics into separate files, keeping SKILL.md as an overview.	2 / 3
	Total	10 / 12 Passed

Description

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 lighting), provides explicit trigger guidance via a 'Use when...' clause, and uses natural keywords users would employ. Its main weakness is that the capability listing is somewhat categorical rather than enumerating specific concrete actions, which slightly reduces specificity.

Suggestions

Expand the capability list with more specific concrete actions, e.g., 'Configure shadow maps, add point/spot/directional lights, set up HDR environment maps for IBL, tune shadow bias and resolution.'

Dimension	Reasoning	Score
Specificity	Names the domain (Three.js lighting) and lists some categories (light types, shadows, environment lighting), but doesn't enumerate specific concrete actions like 'add point lights', 'configure shadow maps', or 'set up HDR environment maps'.	2 / 3
Completeness	Clearly answers both 'what' (Three.js lighting - light types, shadows, environment lighting) and 'when' with an explicit 'Use when...' clause listing specific trigger scenarios (adding lights, configuring shadows, setting up IBL, optimizing lighting performance).	3 / 3
Trigger Term Quality	Includes strong natural trigger terms users would say: 'lights', 'shadows', 'IBL', 'lighting performance', 'Three.js', 'environment lighting'. These cover common variations a user would naturally mention.	3 / 3
Distinctiveness Conflict Risk	Highly distinctive with a clear niche: Three.js lighting specifically. The combination of Three.js + lighting/shadows/IBL creates a narrow, well-defined scope unlikely to conflict with other skills.	3 / 3
	Total	11 / 12 Passed

Validation

100%

Warnings & errors only

Checks the skill against the spec for correct structure and formatting. All validation checks must pass before discovery and implementation can be scored.

Validation — 11 / 11 Passed

Validation for skill structure

No warnings or errors.

Repository: CloudAI-X/threejs-skills
Commit: b1c6230

Reviewed: about 2 months ago

Table of Contents

Discovery Implementation Validation

Is this your skill?

If you maintain this skill, you can claim it as your own. Once claimed, you can manage eval scenarios, bundle related skills, attach documentation or rules, and ensure cross-agent compatibility.