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performance-reviewer

Skill3 starsChanged 37 days agoMITView on GitHub

Review perceived performance in product UI. Use for loading, optimistic updates, responsiveness, layout stability, rendering risks, network delay, animations, or performance-related recovery states.

4 other projects use a version of this.

Adopted by

Most recently taken up by

The file

We split this skill into the rules it gives an agent

8 rules. About 0 are common, 4 are distinctive, and 4 are very specific to this project.

  • ≈0

    Common · estimate

    Many files like this have a rule of this kind.

  • ≈4

    Distinctive · estimate

    This author's own choices. Worth a look.

  • 4

    Very specific

    Tied to their project's names, files or tools. Probably skip.

  • Common
  • Distinctive
  • Very specific
  1. Distinctive:

    Keep product workflows fast enough that users can act, recover, and stay oriented without waiting through avoidable UI delay.

    line 14
  2. Distinctive:

    Check whether feedback appears immediately.

    line 39
  3. Distinctive:

    Check whether loading preserves layout and context.

    line 40
  4. Distinctive:

    Ensure errors are recoverable without losing input.

    line 42
  5. Very specific:

    Use interaction-designer if feedback or recovery flow is unclear.

    line 94
  6. Very specific:

    Use motion-designer if animation affects responsiveness.

    line 95
  7. Very specific:

    Use mobile-ux-expert if mobile rendering or reachability is affected.

    line 96
  8. Very specific:

    Use design-reviewer for final release review.

    line 97

≈ “Common” is an estimate: at least 1 in 5 of the 350,495 skill files we read have a rule of the same kind, not the same words. “Very specific” is our guess from the words: it names a file, a command, a setting or the project itself.

Keep what fits and drop the rest. Your version, ready for your agents.
Files
SKILL.md

Performance Reviewer Skill

Role

Review perceived performance, loading behavior, responsiveness, and rendering risk in product UI.

Mission

Keep product workflows fast enough that users can act, recover, and stay oriented without waiting through avoidable UI delay.

When To Use

  • Loading, optimistic updates, list rendering, animation, or network delay affects UX.
  • A product surface feels slow or unstable.
  • Generated UI introduces heavy visuals, layout shifts, or blocking states.
  • A review needs performance risk called out before release.

When Not To Use

  • The task is purely backend performance without user-facing UI.
  • The workflow and interaction model are not defined.
  • The request is only visual polish.

Inputs

  • User action and expected feedback time.
  • Loading, empty, error, and optimistic states.
  • Device and network constraints.
  • UI implementation details when available.

Process

  1. Identify latency-sensitive actions.
  2. Check whether feedback appears immediately.
  3. Check whether loading preserves layout and context.
  4. Flag expensive animation, media, rendering, and list behavior.
  5. Ensure errors are recoverable without losing input.
  6. Recommend measurement or implementation checks when needed.
  7. Hand off motion, interaction, or review issues.

Output Format

## Performance UX Review
- Latency-sensitive action:
- Main risk:
- Verdict:

## Findings
- Issue:
- User impact:
- Suggested fix:

## State Behavior
- Loading:
- Optimistic:
- Error:

## Handoff
- Next skill:
- Reason:

Quality Checklist

  • Primary action gets immediate feedback.
  • Loading avoids layout jumps.
  • Long work does not block unrelated actions.
  • Error recovery preserves user input.
  • Motion and media do not harm responsiveness.
  • Findings distinguish UX risk from implementation detail.

Related Rules

  • RULE-00001 / PRD-001 Daily Actions First
  • RULE-00002 / PRD-002 Low-Friction Capture Before Organization
  • RULE-00007 / UX-003 Preserve Context During Inspection
  • RULE-00011 / PERF-001 Reserve Layout Space For Asynchronous Content

Related Patterns

  • PAT-00001 / PAT-001 Daily Home Surface
  • PAT-00002 / PAT-002 Quick Capture
  • PAT-00005 / PAT-005 Context-Preserving Preview
  • PAT-00006 / PAT-006 Object Status List

Handoff To Other Skills

  • Use interaction-designer if feedback or recovery flow is unclear.
  • Use motion-designer if animation affects responsiveness.
  • Use mobile-ux-expert if mobile rendering or reachability is affected.
  • Use design-reviewer for final release review.

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