threejs-animation

Three.js animation - keyframe animation, skeletal animation, morph targets, animation mixing. Use when animating objects, playing GLTF animations, creating procedural motion, or blending animations.

Quality

85%

Does it follow best practices?

Run evals on this skill

Adds up to 20 points to the overall score

View guide

Securityby

Passed

No findings from the security scan

The canonical home for this skill is threejs-animation in CloudAI-X/threejs-skills

Quality

Content

78%Weight 40%Scale 1-5

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

A thorough, highly actionable Three.js animation reference that is lean and code-first, but it is a monolithic single-file skill with no progressive disclosure into bundle references despite its length.

Suggestions

Move the procedural animation patterns (smooth damping, spring physics, oscillation) and performance tips into a references/ file, leaving SKILL.md as a concise overview with one-level-deep links.

Trim the redundant 'Animation System Overview' recap and inline code comments that restate the obvious (e.g. '// t=0', '// red') to tighten token efficiency.

Add a short validation/checklist note for the GLTF loading workflow (e.g. confirm clips.length > 0 and that mixer.update is wired into the render loop) to strengthen workflow clarity.

Dimension	Reasoning	Score
Conciseness	Mostly lean, code-dense reference with no padding about what Three.js is, but a few trimmable bits remain (the brief "Animation System Overview" recap and redundant inline comments) that keep it just short of fully lean.	4 / 5
Actionability	Copy-paste-ready executable examples cover the common cases end to end - clips, mixers, actions, GLTF loading, skeletal/morph animation, blending, and procedural patterns - with specific API calls rather than pseudocode.	5 / 5
Workflow Clarity	The core animation-loop workflow (clock -> mixer.update -> render) is shown consistently and the GLTF loading sequence is clear; no destructive/batch operations require validation checkpoints, so minor sequencing gaps rather than missing feedback loops.	4 / 5
Progressive Disclosure	Section headers give decent structure, but 300+ lines with no bundle files means content that could live in separate references (procedural patterns, performance tips, API detail) is fully inlined and there is no one-level-deep navigation to follow.	3 / 5
	Total	16 / 20 Passed

Description

92%Weight 40%Scale 1-5

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 that pairs concrete capability lists with explicit use-when triggers and stays in third-person fragment voice. Only minor gap is the absence of file-extension synonyms (.glb/.gltf) in the trigger set.

Dimension	Reasoning	Score
Specificity	Lists multiple concrete capabilities - "keyframe animation, skeletal animation, morph targets, animation mixing" - covering the sub-domains comprehensively rather than gesturing vaguely at "animation".	5 / 5
Completeness	Explicitly answers both what (the four animation sub-types) and when (the "Use when..." clause enumerating concrete trigger scenarios).	5 / 5
Trigger Term Quality	Natural trigger phrases like "animating objects", "playing GLTF animations", "creating procedural motion", "blending animations" are present, but common synonyms/file extensions (e.g. .glb, 3D models, character animation, rigging) are missing.	4 / 5
Distinctiveness Conflict Risk	"Three.js animation" with skeletal/morph/GLTF triggers carves a clear niche distinct from sibling threejs skills; minimal overlap risk.	5 / 5
	Total	19 / 20 Passed

Validation

93%

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 — 15 / 16 Passed

Validation for skill structure

Criteria	Description	Result
skill_md_line_count	SKILL.md is long (553 lines); consider splitting into references/ and linking	Warning

	Total	15 / 16 Passed

Repository: calesthio/OpenMontage
Path: .agents/skills/threejs-animation/SKILL.md
Commit: 1bab711

Reviewed: about 20 hours 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.