codyswanngt/ops-performance
plugins/lisa-expo-copilot/skills/ops-performance/SKILL.md
Performance analysis for Expo + serverless backend projects. Runs Lighthouse audits, bundle size analysis, and k6 load tests.
$ install --global
skillsauthnpx skillsauth add codyswanngt/lisa ops-performanceInstall this skill globally with one command. Works with Claude Code, Cursor, and Windsurf.
Security Scan Results
3 of 9 scanners reported clean
Some scanners were skipped, did not run, or reported a non-clean status. Review each row below.
3
Scanners Passed
9
Scanners in report
Clean
TrivyContainer and dependency vulnerability scanner
95%
Clean
SemgrepStatic code analysis for vulnerabilities
95%
Clean
mcp-scan (Snyk)Model Context Protocol security validation
95%
Skipped
Snyk (dep)Open source security scanning
50%
Skipped
Socket.devSupply chain security analysis
50%
Skipped
VirusTotalMulti-engine malware detection
50%
Skipped
CrowdStrikeAdvanced threat intelligence
50%
Skipped
OSV-ScannerOpen Source Vulnerability database check
50%
Skipped
OWASP Dep-Check
50%
Last scanned: Apr 12, 2026, 3:01 AM4.3s1 file scanned
SKILL.md
- name:
- ops-performance
- description:
- Performance analysis for Expo + serverless backend projects. Runs Lighthouse audits, bundle size analysis, and k6 load tests.
Ops: Performance
Analyze application performance.
Argument: $ARGUMENTS — analysis type (lighthouse, bundle, k6, all; default: all) and optional target environment
Path Convention
- Frontend: Current project directory (
.) - Backend:
${BACKEND_DIR:-../backend-v2}— setBACKEND_DIRin.claude/settings.local.jsonif your backend is elsewhere
Discovery
- Read frontend
package.jsonforlighthouse:check,export:web,analyze:bundlescripts - Read backend
package.jsonfork6:*scripts - Read
e2e/constants.tsor.env.*files for environment URLs
Lighthouse Audit
Against Local
npx lighthouse http://localhost:8081 \
--output=json \
--output-path=./lighthouse-local.json \
--chrome-flags='--headless --no-sandbox'
Against Deployed Environment
Discover frontend URLs from e2e/constants.ts or .env.* files:
npx lighthouse https://{env_url} \
--output=json \
--output-path=./lighthouse-{env}.json \
--chrome-flags='--headless --no-sandbox'
LHCI (Lighthouse CI — uses project config)
bun run lighthouse:check
Parse Lighthouse Results
cat lighthouse-{env}.json | jq '{
performance: .categories.performance.score,
accessibility: .categories.accessibility.score,
bestPractices: .categories["best-practices"].score,
seo: .categories.seo.score,
fcp: .audits["first-contentful-paint"].displayValue,
lcp: .audits["largest-contentful-paint"].displayValue,
tbt: .audits["total-blocking-time"].displayValue,
cls: .audits["cumulative-layout-shift"].displayValue,
si: .audits["speed-index"].displayValue
}'
Bundle Analysis
Full Analysis (export + source-map-explorer)
bun run export:web && bun run analyze:bundle
Quick Size Check
bun run export:web
echo "=== Total Bundle Size ==="
du -sh dist/
echo ""
echo "=== Largest JS Files ==="
find dist -name "*.js" -exec ls -lhS {} + 2>/dev/null | head -20
k6 Load Tests
Discover available k6 scripts from the backend package.json (matching k6:*).
Smoke Test (minimal load, verify endpoints work)
cd "${BACKEND_DIR:-../backend-v2}"
bun run k6:smoke
Load Test (normal traffic simulation)
cd "${BACKEND_DIR:-../backend-v2}"
bun run k6:load
Stress Test (push beyond normal capacity)
cd "${BACKEND_DIR:-../backend-v2}"
bun run k6:stress
Spike Test (sudden traffic burst)
cd "${BACKEND_DIR:-../backend-v2}"
bun run k6:spike
Docker-based k6 (no local k6 install needed)
cd "${BACKEND_DIR:-../backend-v2}"
bun run k6:docker:smoke
bun run k6:docker:load
Output Format
Lighthouse Scores
| Metric | Score | Rating | |--------|-------|--------| | Performance | 0.85 | GOOD | | Accessibility | 0.92 | GOOD | | Best Practices | 0.88 | GOOD | | SEO | 0.95 | GOOD |
Core Web Vitals
| Metric | Value | Threshold | Status | |--------|-------|-----------|--------| | FCP (First Contentful Paint) | 1.2s | < 1.8s | PASS | | LCP (Largest Contentful Paint) | 2.1s | < 2.5s | PASS | | TBT (Total Blocking Time) | 150ms | < 200ms | PASS | | CLS (Cumulative Layout Shift) | 0.05 | < 0.1 | PASS |
Bundle Size
| Category | Size | Notes | |----------|------|-------| | Total dist/ | 4.2 MB | | | Largest chunk | 1.1 MB | vendor.js |
k6 Results
| Metric | Value | |--------|-------| | Requests/sec | 450 | | Avg response time | 120ms | | p95 response time | 350ms | | Error rate | 0.1% |
Include recommendations for any metrics that fall below thresholds.
Related Skills
codyswanngt/use-dom
development
VerifiedTrustedCommunity
Use Expo DOM components to run web code in a webview on native and as-is on web. Migrate web code to native incrementally.
1SKILL.mdUpdated Jun 6, 2026
codyswanngt/upgrading-expo
development
VerifiedTrustedCommunity
Guidelines for upgrading Expo SDK versions and fixing dependency issues
1SKILL.mdUpdated Jun 6, 2026
codyswanngt/native-data-fetching
development
VerifiedTrustedCommunity
Use when implementing or debugging ANY network request, API call, or data fetching. Covers fetch API, React Query, SWR, error handling, caching, offline support, and Expo Router data loaders (`useLoaderData`).
1SKILL.mdUpdated Jun 6, 2026
codyswanngt/Expo UI SwiftUI
tools
VerifiedTrustedCommunity
`@expo/ui/swift-ui` package lets you use SwiftUI Views and modifiers in your app.
1SKILL.mdUpdated Jun 6, 2026