---
phase: 01-input-ux
verified: 2026-02-16T00:00:00Z
status: passed
score: 5/5 must-haves verified
gaps: []
---

# Phase 01: Input UX Verification Report

**Phase Goal:** Users can log weight and reps quickly on mobile without fighting the inputs

**Verified:** 2026-02-16
**Status:** PASSED
**Re-verification:** No — initial verification

## Goal Achievement

### Observable Truths

| # | Truth | Status | Evidence |
|---|-------|--------|----------|
| 1 | Weight field displays "kg" unit suffix visibly | ✓ VERIFIED | `/src/components/WeightInput.jsx` passes `suffix="kg"` to StepperInput; StepperInput renders suffix in `.input-suffix` span (line 73); CSS styling at lines 1893-1899 |
| 2 | Tapping +/- increments weight by 2.5kg and reps by 1 | ✓ VERIFIED | WeightInput passes `step={2.5}` (line 8); RepsInput passes `step={1}` (line 8); StepperInput handleIncrement/handleDecrement use step param correctly (lines 36-42) |
| 3 | Typing negative values is prevented; stepping below 0 is blocked | ✓ VERIFIED | handleInputChange enforces min constraint (lines 21-24); handleDecrement uses Math.max(min, numValue - step) (line 32); both components set min={0} |
| 4 | All inputs and buttons are at least 44px tall for thumb usability | ✓ VERIFIED | `.stepper-btn` is 44×44px (lines 1821-1824); `.stepper-container` is 48px tall (line 1817); all action buttons have min-height: 44px; mobile optimized to 48×48px (lines 1902-1912) |
| 5 | Input font size is at least 16px to prevent iOS auto-zoom | ✓ VERIFIED | Global rule at lines 1780-1788 sets font-size: 16px for all inputs; `.stepper-input` explicitly sets font-size: 16px (line 1869) |

**Score:** 5/5 truths verified

### Required Artifacts

| Artifact | Expected | Status | Details |
|----------|----------|--------|---------|
| `/src/components/StepperInput.jsx` | Base stepper component with ±/input/suffix | ✓ VERIFIED | 90 lines, complete implementation with min/max validation, step control, suffix support |
| `/src/components/WeightInput.jsx` | Weight wrapper with 2.5kg step and "kg" suffix | ✓ VERIFIED | 19 lines, properly configured StepperInput wrapper with step={2.5}, suffix="kg", min={0} |
| `/src/components/RepsInput.jsx` | Reps wrapper with 1-rep step | ✓ VERIFIED | 19 lines, properly configured StepperInput wrapper with step={1}, min={0} |
| `/src/App.css` - stepper styles | Input sizing (16px font, 44px buttons) | ✓ VERIFIED | Lines 1776-1913 provide complete styling for stepper with accessibility rules |
| `/src/pages/WorkoutPage.jsx` | Integration of WeightInput & RepsInput | ✓ VERIFIED | Lines 3-4 import; lines 329-337 render with proper onChange handlers |

### Key Link Verification

| From | To | Via | Status | Details |
|------|----|----|--------|---------|
| WorkoutPage.jsx | WeightInput | import (line 3) + render (line 329) | ✓ WIRED | Component imported and actively rendered in set logging UI |
| WorkoutPage.jsx | RepsInput | import (line 4) + render (line 334) | ✓ WIRED | Component imported and actively rendered in set logging UI |
| WeightInput.jsx | StepperInput | import (line 1) + render (line 5) | ✓ WIRED | Wrapper properly delegates to base component |
| RepsInput.jsx | StepperInput | import (line 1) + render (line 5) | ✓ WIRED | Wrapper properly delegates to base component |
| StepperInput | User input → onChange | handleInputChange (lines 13-28) | ✓ WIRED | Text input with full validation piped to parent onChange |
| StepperInput | +/- buttons → Handler | handleIncrement/Decrement (lines 30-42) | ✓ WIRED | Buttons call handlers that compute new values and trigger onChange |
| onChange handlers | State update | WorkoutPage setSetInputs (lines 277-282) | ✓ WIRED | Changes flow to parent component state management |
| State → UI | Display updated values | setInputs[setNum] (line 324) | ✓ WIRED | State changes reflect in rendered input values |

### Anti-Patterns Found

**No blockers detected.**

Inspection of key files:
- `/src/components/StepperInput.jsx`: Complete, substantive implementation
- `/src/components/WeightInput.jsx`: No stubs or placeholders
- `/src/components/RepsInput.jsx`: No stubs or placeholders
- `/src/App.css`: All required accessibility and sizing rules present (no TODO/FIXME)
- `/src/pages/WorkoutPage.jsx`: Full integration with proper state management

### Requirements Satisfaction

All 5 success criteria from ROADMAP.md satisfied:

1. ✓ Weight field shows "kg" unit suffix visibly inside or adjacent to the input
2. ✓ Tapping + or - on weight steps by 2.5kg; tapping + or - on reps steps by 1
3. ✓ Weight and reps inputs reject negative values — typing or stepping below 0 is blocked
4. ✓ All input fields and action buttons are at least 44px tall and usable with one thumb
5. ✓ Input font size is at least 16px so iOS does not auto-zoom the page on focus

---

## Summary

Phase 01 goal is fully achieved. The input UX is complete with:

- **StepperInput**: Reusable component with validation, stepping, min/max constraints, and optional suffix display
- **WeightInput**: Configured for 2.5kg increments with "kg" suffix
- **RepsInput**: Configured for 1-rep increments
- **CSS**: Accessibility-first sizing (44px minimum touch targets on desktop, 48px on mobile) with 16px font to prevent iOS auto-zoom
- **Integration**: Fully wired in WorkoutPage for exercise logging

All artifacts exist, are substantive (not stubs), and are properly wired. Users can quickly log weight and reps on mobile without fighting unresponsive or inaccessible inputs.

---

_Verified: 2026-02-16_
_Verifier: Claude (gsd-verifier)_
