[scatter-basic] highcharts implementation

[github-actions]

[scatter-basic] highcharts Implementation

Parent Issue: #207
Spec: specs/scatter-basic.md
Library: highcharts
Feature Branch: plot/scatter-basic

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Attempt History

Attempts will be documented below as comments.

[github-actions]

Attempt 1/3

Technical Approach

• Imports: import tempfile, import time, import urllib.request
• Plot function: ScatterSeries
• Config: style=margin:0;, color=#306998

Status

• PR: feat(highcharts): implement scatter-basic #479
• File: plots/highcharts/scatter/scatter-basic/default.py
• Workflow: 20002912007

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[github-actions]

🧪 Test Results (PR #479)

Python:

📊 Plot Preview (Python 3.13)

highcharts (default) - UPDATE

Before	After

View version history (3 versions)

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🤖 Generated by gen-preview workflow

[claude]

AI Review - Attempt 1/3

Quality Evaluation

Evaluator	Score	Verdict
Claude	92/100	approve

Criteria Checklist

• VQ-001: Axes labeled correctly ("X Value", "Y Value")
• VQ-002: Visual clarity - grid is subtle (rgba(0,0,0,0.1))
• VQ-003: Elements clear - data points visible with appropriate size (radius: 8)
• VQ-004: No overlap - labels, ticks all readable
• VQ-005: Legend - correctly disabled for single series
• VQ-006: Colorblind safe - single blue color (#306998)
• VQ-007: Image size correct (4800 × 2700 px)
• VQ-008: Title present and centered ("Basic Scatter Plot")
• [N/A] CQ-001: Type hints - not required for plot scripts (KISS style)
• [N/A] CQ-002: Docstring - not required for plot scripts (KISS style)
• [N/A] CQ-003: Input validation - not required for plot scripts
• [N/A] CQ-004: Clear error messages - not required for plot scripts
• [N/A] CQ-005: No magic numbers - acceptable in plot scripts
• CR-001: Data accurate - correct x/y data visualization
• CR-002: Spec compliance - matches scatter-basic spec requirements
• CR-003: Edge cases - uses fixed seed for reproducibility

Issues Found

None - implementation is clean and follows all guidelines.

Strengths

1. Correctly uses container="container" as per highcharts.md guidelines
2. Downloads and inlines Highcharts JS for headless Chrome compatibility
3. Proper font sizing for high-resolution output (48px title, 40px axis titles, 32px labels)
4. Uses PIL to crop to exact dimensions
5. Clean KISS-style implementation

Verdict: APPROVED

The highcharts scatter-basic implementation meets all quality criteria. The visual output is clean, properly labeled, and matches the specification requirements.