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matterjs

Use when implementing 2D physics interactions with Matter.js, including Engine/World setup, Render/Runner configuration, adding bodies and constraints, and scroll/interaction-friendly canvas scenes.

80

Quality

100%

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SKILL.md
Quality
Evals
Security

Quality

Content

100%

Reviews the quality of instructions and guidance provided to agents. Good implementation is clear, handles edge cases, and produces reliable results.

The body is a tight, actionable reference: executable setup and interaction code, a clear sequenced workflow, and useful teardown/question sections, all without redundant explanation or premature external references. It respects the context budget while remaining copy-paste ready.

DimensionReasoningScore

Conciseness

The body is lean and assumes Claude's competence: it offers copy-paste setup code with no preamble explaining what Matter.js or physics is, and each token earns its place; it avoids the score-2 padding seen in the 'good library that handles most formats' example.

3 / 3

Actionability

Provides fully executable, copy-paste-ready HTML and JS blocks (Engine/Render/Runner setup, Composite.add, MouseConstraint, Runner.stop) with specific APIs rather than pseudocode, matching the score-3 anchor.

3 / 3

Workflow Clarity

A clear four-step numbered workflow with an accompanying teardown checklist and 'questions to ask when specs are missing'; the operation is non-destructive (physics sim setup), so the missing-validation cap does not apply and the simple-skill guideline permits a 3.

3 / 3

Progressive Disclosure

Content is organized into clearly signaled sections (Workflow, Minimal setup, Common patterns, Mouse interaction (optional), Cleanup checklist, Questions) with no bundle files present and no nested references; per the simple-skill guideline, well-organized sections alone score 3 when no external references are needed.

3 / 3

Total

12

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12

Passed

Description

100%

Based on the skill's description, can an agent find and select it at the right time? Clear, specific descriptions lead to better discovery.

A strong, well-scoped description: it opens with an explicit 'Use when' trigger, names a specific library and domain, and lists several concrete capabilities. It would naturally surface when a user asks for Matter.js or 2D physics work.

DimensionReasoningScore

Specificity

Lists multiple concrete actions ('Engine/World setup, Render/Runner configuration, adding bodies and constraints, and scroll/interaction-friendly canvas scenes') rather than vague language; matches the score-3 anchor of listing several specific actions and exceeds the score-2 'domain and some actions' bar.

3 / 3

Completeness

Explicitly answers both 'what' (Engine/World setup, Render/Runner config, bodies/constraints, canvas scenes) and 'when' via an explicit 'Use when...' clause, matching the score-3 anchor; it is not capped at 2 because the trigger is explicit rather than merely implied.

3 / 3

Trigger Term Quality

Includes the natural library name 'Matter.js' and the user-saying-it phrase '2D physics interactions', plus reasonable variation; sits above the score-2 'some relevant keywords' anchor though it leans somewhat on API jargon (Engine/World, Render/Runner).

3 / 3

Distinctiveness Conflict Risk

Tied to a specific named library (Matter.js) and a clear 2D-physics niche, making it unlikely to trigger for the wrong skill and matching the score-3 'clear niche with distinct triggers' anchor.

3 / 3

Total

12

/

12

Passed

Validation

100%

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

Validation16 / 16 Passed

Validation for skill structure

No warnings or errors.

Repository
MengTo/Skills
Reviewed

Table of Contents

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