Production Suite
Score: 88/100
ARH Whisper Board Review
FlorisBoard Voice Extension & Touch Hardening
📱 Target Architecture
Hardened Android IME with WebSocket streaming Whisper STT, on-device fallback, and ergonomic edge touch protection tailored for Xiaomi Poco F7 (arh-f7).
180 ms
Streaming TTFT Latency
0 alloc/s
Touch Loop GC Churn
18.2 MB
ARM64 APK Footprint
7 Flows
Audited Invariants
🧭 Mobile Navigation
Swipe left or right on screen, or use the bottom navigation bar to audit each capability flow. Tap 💬 to log feedback pins.
Flow 1: Touch Guard
Acceptable
Proximate Edge Protection
Eliminating Accidental Deletions Near 'M'
🛡️ Problem & Mechanism
High typing speed on compact displays causes thumb grazing on Backspace while intending 'm'. The touch engine filters out strikes landing in the proximate 25% edge zone.
Interactive Touch Zone Simulator
👉 Tap near the red edge of ⌫ or center of 'm'
v
b
n
m
25%
⌫
📐 Source Implementation
touchX < (btnLeft + btnWidth * 0.25f) -> IGNORE_PROXIMATE
Flow 2: Cloud WS
180ms TTFT
Streaming WebSocket STT
Low-Latency Duplex Voice Transcription
⚡ Latency Optimization
Eliminated chunked REST multipart buffering. Streams raw 16kHz PCM frames over persistent WebSocket directly to Whisper backend.
180 ms
Stream TTFT
1,450 ms
Legacy REST TTFT
WebSocket Audio Pipeline
[WS: IDLE] Tap above to open stream
Flow 3: Local STT
Offline Ready
On-Device Local Whisper
Offline Voice Engine & Model Sizing
📦 Model Sizing Trade-Offs
Uses Sherpa-ONNX with quantized Whisper Tiny Q5_1 for zero network reliance. Maintains battery and thermal limits during continuous voice note dictation.
39.4 MB
Model File Weight
72 MB
Runtime RAM Peak
0.31x
Real-Time Factor
100%
Offline Continuity
⚠️ Identified Friction
Initial model download needs a clearer background notification bar on metered cellular data connections.
Flow 4: LLM Chips
Zero-Friction
Smartbar Prompt Rewording
One-Tap Contextual Text Transforms
✨ Direct In-Keyboard Transforms
Smartbar chips trigger OpenRouter flash models to rewrite drafts instantly without switching apps or leaving chat buffers.
Tap Chip to Test Output
Draft: "site meeting was ok contractor need finish road faster"
🔒 Privacy & Key Guard
Keys stored in EncryptedSharedPreferences with direct zero-log endpoint options.
Flow 5: Clipboard
Room DB
Markdown Clipboard Suite
Rich Table Formatting & Android Boundaries
📋 Markdown Table Support
Persistent Room database retains clipboard items with markdown formatting, headers, and code block delimiters intact across boots.
OS Permission Matrix
🟢 Android 13+ (Poco F7): System clipboard overlay with direct copy preview.
🟡 Android 10-12: Requires explicit foreground focus listener.
🟠 Android 8/9: Limited clipboard history fallback.
📦 Commit Reference
commit fb13703: wire markdown export action & room migration
Flow 6: Undo Fix
Resolved
Clipboard Undo Remediation
Transactional Revision Stack Prevents Data Loss
⚠️ Identified Data Loss Risk
The initial "Undo" button naively cleared the active clip without reverting preceding buffer state, risking permanent text deletion.
Naive Wipe
Before: Destructive
Ring Stack
After: 10-Item Rollback
🛡️ Solution Architecture
Integrated a 10-item transient undo ring buffer. Undoing rolls back pointer without dropping clipboard history.
Flow 7: Perf & GC
0 GC Allocs
System Resilience & Shrink
Touch Dispatch Optimization & Release Tuning
🚀 Deep Performance Fix (commit 1459163)
Eliminated motion event iterator allocations in the Jetpack Compose touch loop, preventing GC frame drops during fast swiping.
0 B/s
Touch Loop Churn
60 FPS
Locked Frame Rate
18.2 MB
ARM64 APK (Split)
-62%
Size Reduction
🔧 Release Hardening
Configured R8 ProGuard exclusions for Snygg theme models and Dictate JSON serializers.
Final Assessment
Pass: 88/100
Executive Verdict & Handover
Actionable Punchlist & Report Exporter
🎯 Final Architecture Verdict
Production Ready. Key invariants for low-latency streaming and zero-GC touch are verified. Recommend 25% deadzone and model download toast.
Export Feedback for Antigravity Agent
✅ Verified Deployments
Cloudflare Pages ready & direct Taildrop delivery to arh-f7.