Harness-engineering perf-performance-api

name: perf-performance-api version: '1.0.0' description: Performance Observer and timing APIs — PerformanceEntry types, User Timing, Resource Timing, Navigation Timing stability: static cognitive_mode: advisory-guide type: knowledge tier: 3 triggers:

• manual platforms:
• claude-code
• gemini-cli
• cursor
• codex tools: [] paths: [] related_skills:
• perf-largest-contentful-paint
• perf-interaction-to-next-paint
• perf-cumulative-layout-shift
• perf-long-tasks
• perf-profiling-methodology
• otel-performance-insights
• test-performance-testing stack_signals: [] keywords:
• Performance API
• PerformanceObserver
• User Timing
• Resource Timing
• Navigation Timing
• performance.mark
• performance.measure
• PerformanceEntry
• Server Timing metadata: author: community state: persistent: false files: [] depends_on: []