# Prototype Findings: Graph Visualization

**Date:** 2025-10-25
**Time Started:** [Fill in]
**Time Ended:** [Fill in - 2 hours max]
**Prototypes Tested:** v1 (D3-force), v2 (Custom layouts)

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## Instructions

Test each prototype for 5-10 minutes. Document your gut reactions, not technical analysis. What FEELS right?

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## Prototype v1: D3-Force

**File:** `prototype-v1-d3.html`
**Approach:** D3 force-directed layout with physics simulation

### First Impressions

- [ ] Graph settled quickly (within 3 seconds)
- [ ] Graph felt "organic" and natural
- [ ] Graph felt "alive" vs static
- [ ] Positions were predictable
- [ ] Positions were chaotic/confusing

### Performance

- FPS during animation: _____ fps
- FPS when stable: _____ fps
- Did it feel smooth? (Yes/No): _____
- Any lag when hovering? (Yes/No): _____

### Interactions

Rate 1-5 (1=bad, 5=excellent):

- Hover responsiveness: _____/5
- Pan smoothness: _____/5
- Zoom feel: _____/5
- Click to focus: _____/5
- Overall "fun factor": _____/5

### Pros

What felt GOOD about D3-force?

1.
2.
3.

### Cons

What felt BAD or confusing?

1.
2.
3.

### Would you ship this?

Yes / No / Maybe

**Why?**


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## Prototype v2: Custom Layouts

**File:** `prototype-v2-custom.html`
**Approach:** Simple deterministic layouts (circular, cluster, grid, spiral)

### Layout Tests

Test all 4 layouts. Which felt best for the Open Design Atlas?

**Circular Layout:**
- Pros:
- Cons:
- Rating: _____/5

**Cluster Layout (by gallery):**
- Pros:
- Cons:
- Rating: _____/5

**Grid Layout:**
- Pros:
- Cons:
- Rating: _____/5

**Spiral Layout:**
- Pros:
- Cons:
- Rating: _____/5

### Performance

- FPS: _____ fps
- Animation smoothness: _____/5
- Feels faster than v1? (Yes/No): _____

### Pros

What felt GOOD about custom layouts?

1.
2.
3.

### Cons

What felt BAD or limiting?

1.
2.
3.

### Would you ship this?

Yes / No / Maybe

**Why?**


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## Direct Comparison

### Which prototype felt better overall?

**Winner:** v1 (D3) / v2 (Custom) / Hybrid

**Why?**


### What did v1 do better than v2?

1.
2.
3.

### What did v2 do better than v1?

1.
2.
3.

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## Technical Observations

### Complexity

- D3-force seemed: Simple / Medium / Complex to understand
- Custom approach seemed: Simple / Medium / Complex to understand

**Which would be easier to maintain long-term?**


### Bundle Size

- D3.js adds ~70KB gzipped
- Is this worth it? (Yes/No): _____
- Could you write custom physics instead? (Yes/No): _____

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## Hybrid Approach?

Could you combine the best of both?

**Idea:**


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## Final Decision

### For Phase 0 (Month 1), I will use:

- [ ] D3-force (v1 approach)
- [ ] Custom layout (v2 approach)
- [ ] Hybrid approach
- [ ] Something else entirely

### Reasoning

**Why this approach?**


**What I'll borrow from prototypes:**

1.
2.
3.

**What I'll do differently:**

1.
2.
3.

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## Architectural Decisions

Based on testing, answer these questions:

### 1. Pan/Zoom Implementation

- [ ] Use D3-zoom (if using D3)
- [ ] Use custom transform logic (lighter)
- [ ] Use a different library: _________

### 2. Canvas vs SVG

- [ ] Canvas (what prototypes used)
- [ ] SVG (DOM-based, easier interactions)
- [ ] Hybrid (Canvas for graph, SVG for UI)

**Why?**


### 3. Mobile Touch Gestures

- [ ] Critical for Phase 0 (must have pinch/zoom)
- [ ] Nice to have for Phase 1
- [ ] Skip for now, desktop first

### 4. Graph Data Structure

```typescript
// Based on testing, my data structure will be:

interface GraphNode {
    // Fill in after deciding approach
}
```

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## Lessons Learned

### What surprised you?




### What was harder than expected?




### What was easier than expected?




### If you could redo the prototypes, what would you test differently?




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## Next Steps

### Immediate Actions

1. [ ] Save this document to project notes
2. [ ] Delete prototype directory (it's served its purpose)
3. [ ] Document decisions in ADR 002
4. [ ] Proceed to Feature 0 (dev environment setup)

### Carry Forward

**Code patterns to reuse:**

1.
2.
3.

**Code patterns to avoid:**

1.
2.
3.

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## Time Tracking

**Total time spent:** _____ minutes (should be ≤120 minutes)

**Was 2-hour time box helpful?** Yes / No

**Comments:**


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**✅ Prototype phase complete!**

Now throw away the code and build the real version with confidence.