Benchmarks

Feature development timing

Real measurements from the test app (30 stories completed across the Ralph Loop):

Feature complexity	Time	Crashes	Manual interventions
Simple (search, toggle, store)	3-5 min	0	0
Medium (forms, charts, lists)	5-10 min	0	0
Complex (3-step wizard, onboarding)	11-25 min	0	0
4-feature batch verification	~2 min	0	0

Phase	Typical time
1-3 (Discovery, Exploration, Questions)	~3 min
4 (Architecture)	~1 min
5 (Implementation)	~5 min
5.5 (Live verification)	~5 min
6 (Code review + fixes)	~4 min
7-8 (Summary + E2E proof)	~2 min

All libraries below were successfully integrated and verified through the pipeline:

Library	Story type
react-hook-form	Form wizard
zod	Validation
@tanstack/react-query	Data fetching
@gorhom/bottom-sheet	Bottom sheet
@shopify/flash-list	High-performance list
zustand	State management
react-native-svg	Charts
expo-notifications	Push notifications
react-native-reanimated	Animations
react-native-gesture-handler	Gestures
expo-haptics	Haptic feedback

Optimized device interaction latency via the fast-runner (XCTest HTTP server):

Operation	Latency	Improvement
Tap	~216ms	13x faster than CLI
Snapshot (accessibility tree)	~5ms	100x faster
Screenshot	~74ms	4x faster
Per-step overhead	~1.4s	vs ~3.1s baseline

The XPC floor (~210ms) is the hard limit for _XCT_synthesizeEvent — further tap optimization requires Apple framework changes.