feedback-indicators
Use when confirming user actions - success checkmarks, error alerts, form validation, save confirmations, or any animation acknowledging what the user did.
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Install
Works with every agent the skills CLI supports.
npx skills add https://github.com/dylantarre/animation-principles --skill feedback-indicators- 01
Install
Run the command in your project. The CLI asks which agents to install for.
- 02
Describe the task
Ask your agent for something this skill covers. It loads feedback-indicators automatically when relevant.
- 03
Review the result
The agent follows the SKILL.md steps, scripts and references bundled with the skill.
SKILL.md
The instructions your agent reads when the skill is triggered.
Feedback Indicator Animations
Apply Disney's 12 principles to action confirmation animations.
Principle Application
Squash & Stretch: Success checkmarks can scale with overshoot. Compress on draw, expand on complete.
Anticipation: Brief gather before feedback appears. 50ms of preparation before the confirmation.
Staging: Feedback appears at the action location. Button shows checkmark, field shows validation.
Straight Ahead vs Pose-to-Pose: Define feedback states: neutral → processing → success/error.
Follow Through & Overlapping: Icon animates, then label appears. Stagger confirmation elements.
Slow In/Slow Out: Success: ease-out (confident arrival). Error: ease-in-out (shake settles).
Arcs: Checkmarks draw in arcs, not straight lines. Error X's cross naturally.
Secondary Action: Checkmark draws + color shifts + scale bounces for rich feedback.
Timing:
- Instant feedback: 100-200ms (form validation)
- Success confirmation: 300-500ms (checkmark draw)
- Error indication: 400ms (shake + message)
- Auto-dismiss: 2000-4000ms after appearance
Exaggeration: Success deserves celebration. Overshoot scale to 1.2, bold colors, confident motion.
Solid Drawing: Feedback icons must be clear at a glance. Recognition in 100ms or less.
Appeal: Positive feedback should feel rewarding. Negative feedback firm but not punishing.
Timing Recommendations
| Feedback Type | Duration | Auto-dismiss | Easing |
|---|---|---|---|
| Inline Validation | 150ms | No | ease-out |
| Checkmark Draw | 400ms | 3000ms | ease-out |
| Success Toast | 300ms | 4000ms | ease-out |
| Error Shake | 400ms | No | ease-in-out |
| Error Toast | 300ms | 6000ms | ease-out |
| Save Indicator | 200ms | 2000ms | ease-out |
Implementation Patterns
/* Checkmark draw */
.checkmark {
stroke-dasharray: 50;
stroke-dashoffset: 50;
animation: draw-check 400ms ease-out forwards;
}
@keyframes draw-check {
to { stroke-dashoffset: 0; }
}
/* Success with scale */
.success-icon {
animation: success 500ms cubic-bezier(0.34, 1.56, 0.64, 1) forwards;
}
@keyframes success {
0% { transform: scale(0); opacity: 0; }
60% { transform: scale(1.2); opacity: 1; }
100% { transform: scale(1); opacity: 1; }
}
/* Error shake */
.error-shake {
animation: shake 400ms ease-in-out;
}
@keyframes shake {
0%, 100% { transform: translateX(0); }
20%, 60% { transform: translateX(-6px); }
40%, 80% { transform: translateX(6px); }
}
/* Inline validation */
.field-valid {
animation: valid-pop 200ms ease-out;
}
@keyframes valid-pop {
0% { transform: scale(0.8); opacity: 0; }
100% { transform: scale(1); opacity: 1; }
}
SVG Checkmark Pattern
<svg class="checkmark" viewBox="0 0 24 24">
<circle cx="12" cy="12" r="10" fill="#10B981"/>
<path
class="check-path"
d="M7 13l3 3 7-7"
stroke="white"
stroke-width="2"
fill="none"
/>
</svg>
Auto-Dismiss Pattern
// Show success, auto-hide
element.classList.add('success-visible');
setTimeout(() => {
element.classList.remove('success-visible');
element.classList.add('success-hidden');
}, 3000);
Key Rules
- Feedback must appear within 100ms of action
- Success states: celebrate briefly, don't linger
- Error states: persist until user acknowledges
- Always provide text alongside icons for accessibility
prefers-reduced-motion: instant state, no animation
FAQ
What does the feedback-indicators skill do?
Use when confirming user actions - success checkmarks, error alerts, form validation, save confirmations, or any animation acknowledging what the user did.
How do I install feedback-indicators?
Run npx skills add https://github.com/dylantarre/animation-principles --skill feedback-indicators in your project. The skills CLI detects the agents you use and copies the skill into the right folder. For Claude Code you can also place the skill folder at ~/.claude/skills/feedback-indicators/ (personal) or .claude/skills/feedback-indicators/ (project).
Which AI agents can use feedback-indicators?
Any agent that supports the open Agent Skills format (a folder with a SKILL.md file), including Claude Code, Codex, Cursor, GitHub Copilot, Gemini CLI, Windsurf, Cline, OpenCode and more.
Is feedback-indicators safe to install?
No partner security audit is available yet. Skills can run commands and scripts, so read the SKILL.md and any bundled files before installing.
Who maintains feedback-indicators?
It is published by dylantarre in dylantarre/animation-principles. It has 496 recorded installs.
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