interaction-latency

Measure time from user tap to action completion. Use when tracking button response times, form submissions, add-to-cart, or any tap-triggered operation.

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Install this agent skill to your Project

npx add-skill https://github.com/nexus-labs-automation/mobile-observability/tree/main/skills/interaction-latency

SKILL.md

Interaction Latency

Time from user tap to action successfully completed.

When to Use

"Add to cart" button tapped → cart updated
"Submit" button tapped → form processed
"Like" button tapped → state changed
Any tap that triggers async work

Measurement Pattern

TAP → START_SPAN → [async work] → END_SPAN

Capture tap timestamp
Start span with operation name
End span when action confirms success
Include success/failure outcome

Key Thresholds

Rating	Duration
Good	<300ms
Acceptable	<1s
Poor	>1s

Implementation

See references/ui-performance.md (Entry Point Latency section) for platform-specific code.

Common Mistakes

Ending span on API call start (not completion)
Not tracking failure cases
Missing the tap timestamp (starting late)

Related Skills

See skills/navigation-latency for screen-to-screen transitions (vs single-tap actions)
Combine with skills/user-journey-tracking for friction detection on key interactions