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Animation Principles · owl-listener | DecimalAI

design mediaby owl-listener

Animation Principles

owl-listener/animation-principles

Source owl-listener/designer-skills ↗License MIT

Apply animation principles to UI motion for purposeful, polished interactions.

SkillScore100Maintained

Automatic

Frontend / UI pack

Last verified 8/12/2026

What it changes

Passed 22 of 22 test cases with the skill, and 18 of 22 without it.

Without skill82%

With skill100%

Checks it passed that the model alone missed

recommends a duration range between 50ms and 100ms
specifies a duration range between 400ms and 700ms
recommends limiting total sequence duration to under 700ms

and 1 more in the full report

4 fixed18 passed either way0 still failing0 broke

Pass-rate lift: +18 pp
Tokens: -2%
Agent turns: 0%
Response time: -35%

Model gemini-3.6-flashMeasured 8/12/2026v122 of 22 cases passed with skill

Tokens, turns and time describe resource use, not a dollar price.

Use this skill

Save it into your project's skills folder. Claude Code picks it up in its next session.

curl -fsSL --create-dirs -o .claude/skills/owl-listener-animation-principles/SKILL.md https://app.decimal.ai/s/owl-listener-animation-principles/SKILL.md

Want it pinned and updatable? pip install "decimalai>=0.15", then decimalai skills add owl-listener-animation-principles, and start Claude Code with claude --plugin-dir "$(git rev-parse --show-toplevel)/.agents"

1 · One-time — install the CLI (docs ↗)

pip install "decimalai>=0.15"

2 · Get the skill — writes .agents/skills/owl-listener-animation-principles/ and pins it in .decimal/skills.lock

decimalai skills add owl-listener-animation-principles

No CLI? Get the same file — curl · raw file

curl -fsSL --create-dirs -o .claude/skills/owl-listener-animation-principles/SKILL.md https://app.decimal.ai/s/owl-listener-animation-principles/SKILL.md

Raw file: /s/owl-listener-animation-principles/SKILL.md ↗ · machine-readable summary at /s/owl-listener-animation-principles.json ↗

Safety checks: 3 of 3 passed

Code scan CleanIntent PassedContent Clean

See it in action

One of 4 test cases the skill fixed. Same model, same prompt, with and without the skill.

1 of 4

Prompt

An animated list sequence staggers 12 items, resulting in a total sequence time of 1800ms before the last item lands. What upper bound applies to total sequence duration for staggered elements?

What was checked, without and with the skill
Checked	Without skill	With skill
recommends limiting total sequence duration to under 700ms	Missed	Passed

case-09 · gemini-3.6-flash · 8/12/2026 · answers are capped and redacted

What's inside

The instructions your model reads when the skill loads.

SKILL.md38 linessingle file

Animation Principles

You are an expert in applying motion design principles to create purposeful UI animations.

What You Do

You apply animation principles to make interfaces feel natural, guide attention, and communicate state changes.

Core UI Animation Principles

Easing

Ease-out: decelerating (entering elements)
Ease-in: accelerating (exiting elements)
Ease-in-out: both (moving between positions)
Linear: only for continuous animations (progress bars)

Duration

Micro (50-100ms): button states, toggles
Short (150-250ms): tooltips, fades, small movements
Medium (250-400ms): page transitions, modals
Long (400-700ms): complex choreography

Motion Principles

Purposeful: every animation communicates something
Quick: faster is almost always better in UI
Natural: follow physics (acceleration, deceleration)
Choreographed: related elements move in coordinated sequence
Interruptible: animations can be cancelled mid-flight

Animation Types

Entrance: fade in, slide in, scale up
Exit: fade out, slide out, scale down
Emphasis: pulse, shake, bounce
Transition: morph, crossfade, shared element
Loading: skeleton shimmer, spinner, progress

Stagger and Sequence

Stagger related items by 30-50ms each
Lead with the most important element
Limit total sequence duration to under 700ms
Use consistent direction for related movements

Best Practices

Support prefers-reduced-motion
Don't animate for the sake of it
Test on low-powered devices
Keep animations under 400ms for responsive feel
Use will-change or transform for performance

Track record

Benchmark

22 / 22

test cases passed, vs 18 / 22 without

Adoption

Users: 0
Times used: 0

Safety and source details

SkillSafety

✓ 3 of 3 passed

Code scan15 of 15 checks clean

0 critical · 0 warning · 0 info — scanner v4 — 8/3/2026

View 15 scanner checks

live_secretremote_code_executionreverse_shelldata_exfiltrationssrf_metadataagent_snoopinganti_refusaldestructive_commandsobfuscated_unicodeunicode_homoglyphopaque_blobsuspicious_urltool_overreachtrigger_abuseprompt_injection_phrasing

IntentSafe

LLM judge · does the skill do what it claims

ContentClean

LLM judge · policy & harmful-content review

Source

Imported

owl-listener / designer-skills

interaction-design/skills/animation-principles/SKILL.md

View on GitHub ↗

License MITImported 8/10/2026Version v1

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More skills from the same source and nearby in the registry, with their headline benchmark lift.

Ready to supercharge your AI agents?

See it in action

What's inside

Animation Principles

What You Do

Core UI Animation Principles

Easing

Duration

Motion Principles

Animation Types

Stagger and Sequence

Best Practices

Track record

Benchmark

Adoption

SkillSafety

Source

Other skills for the same job

Related skills