# Visual Improvements Verification Checklist

**Date**: 2025-12-09
**Changes**: Tree layout spacing and connector line visibility

## Quick Verification

### 1. Changes Applied ✅

- [x] **Horizontal Spacing Reduced**: `levelWidth` changed from 180px → 130px
- [x] **Link Color Brightened**: stroke changed from `#4a5568` → `#adbac7`
- [x] **Link Width Increased**: stroke-width changed from 2px → 2.5px
- [x] **Link Opacity Increased**: opacity changed from 0.6 → 0.85
- [x] **Both ENTER and UPDATE phases updated** for consistency

### 2. Code Locations Verified ✅

```bash
# Spacing change (line 2834)
const levelWidth = 130;  // ✅ VERIFIED

# Link styling - ENTER phase (lines 3628-3633)
.style('stroke', '#adbac7')     // ✅ VERIFIED
.style('stroke-width', '2.5px')  // ✅ VERIFIED
.style('opacity', 0.85);         // ✅ VERIFIED

# Link styling - UPDATE phase (line 3655)
.style('opacity', 0.85);         // ✅ VERIFIED
```

### 3. Expected Visual Results

When you run `mcp-vector-search visualize`:

**Connector Lines**:
- [ ] Lines are clearly visible (not faint)
- [ ] Color is lighter gray, stands out against dark background
- [ ] Line thickness is noticeable but not overwhelming
- [ ] Easy to trace parent-child relationships

**Tree Layout**:
- [ ] Nodes are closer together horizontally
- [ ] Tree is more compact (less horizontal scrolling)
- [ ] Still enough space between nodes (no crowding)
- [ ] Labels don't overlap

## Manual Testing Steps

1. **Start visualization server**:
   ```bash
   cd /Users/masa/Projects/mcp-vector-search
   mcp-vector-search visualize
   ```

2. **Open browser**: Navigate to http://localhost:8080

3. **Test scenarios**:
   - Click on root node to expand tree
   - Verify connector lines are clearly visible
   - Check horizontal spacing is comfortable
   - Expand/collapse nodes to see line transitions
   - Test with different tree depths

4. **Visual checks**:
   - Can you easily follow lines from parent to child?
   - Is the tree more compact than before?
   - Do lines maintain visibility at all zoom levels?
   - Are transitions smooth (fade in/out)?

## Success Metrics

| Metric | Before | After | Status |
|--------|--------|-------|--------|
| Connector opacity | 0.6 | 0.85 | ✅ |
| Connector color | #4a5568 (dark) | #adbac7 (light) | ✅ |
| Connector width | 2px | 2.5px | ✅ |
| Horizontal spacing | 180px | 130px | ✅ |
| Code changes | - | 3 locations | ✅ |

## Rollback Plan

If visual improvements cause issues:

```bash
cd /Users/masa/Projects/mcp-vector-search
git checkout HEAD -- src/mcp_vector_search/cli/commands/visualize/templates/scripts.py
```

Or adjust values manually:
- `levelWidth`: Try 140px or 150px if 130px is too tight
- `stroke`: Try `#9ea7b3` if `#adbac7` is too bright
- `opacity`: Try 0.75 if 0.85 is too opaque

## Related Documents

- **Implementation**: TREE_LAYOUT_VISUAL_IMPROVEMENTS_2025-12-09.md
- **Previous Tree Fix**: D3_TREE_LAYOUT_IMPLEMENTATION_2025-12-09.md
- **Click Handler**: CLICK_HANDLER_FIX_2025-12-09.md
