feat(altair): implement circlepacking-basic

[github-actions]

Implementation: circlepacking-basic - altair

Implements the altair version of circlepacking-basic.

File: plots/circlepacking-basic/implementations/altair.py

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🤖 impl-generate workflow

[claude]

AI Review - Attempt 1/3

Image Description

The plot displays a circle packing chart with nested circles representing a company budget hierarchy. The visualization uses a blue color scheme with three depth levels: a large semi-transparent root circle (darkest blue, very low opacity), four semi-transparent department circles (medium blue), and 13 solid team circles (lighter blue). Each team circle is labeled with the team name and budget value (e.g., "Backend $180K", "Mobile $120K"). The title "circlepacking-basic · altair · pyplots.ai" appears at the top. The circles are arranged in a roughly triangular layout, but critically, circles from different parent departments overlap each other incorrectly.

Quality Score: 58/100

Criteria Checklist

Visual Quality (21/40 pts)

• VQ-01: Text Legibility (8/10) - Labels are readable but could be larger; some overlap with circle edges
• VQ-02: No Overlap (0/8) - CRITICAL: Circles from different departments overlap each other, violating circle packing principles
• VQ-03: Element Visibility (5/8) - Circles are visible with good opacity gradients by depth
• VQ-04: Color Accessibility (5/5) - Blue gradient is colorblind-safe
• VQ-05: Layout Balance (3/5) - Uses canvas well but layout is chaotic due to overlaps
• VQ-06: Axis Labels (0/2) - Not applicable for this chart type (no axes)
• VQ-07: Grid & Legend (0/2) - No legend showing department groupings

Spec Compliance (18/25 pts)

• SC-01: Plot Type (5/8) - Attempts circle packing but fails proper nesting/containment
• SC-02: Data Mapping (5/5) - Values correctly mapped to circle sizes
• SC-03: Required Features (3/5) - Missing proper nesting where parent circles contain children
• SC-04: Data Range (3/3) - All data visible
• SC-05: Legend Accuracy (0/2) - No legend to identify departments
• SC-06: Title Format (2/2) - Correct format: circlepacking-basic · altair · pyplots.ai

Data Quality (17/20 pts)

• DQ-01: Feature Coverage (6/8) - Shows hierarchy with varying sizes, but nesting not visible
• DQ-02: Realistic Context (7/7) - Company budget allocation is a realistic scenario
• DQ-03: Appropriate Scale (4/5) - Budget values are realistic ($40K-$180K for teams)

Code Quality (2/10 pts)

• CQ-01: KISS Structure (0/3) - Uses multiple functions and classes (calc_value, calc_depth, pack_circles_tight, etc.)
• CQ-02: Reproducibility (2/3) - Has np.random.seed(42) but doesn't use random data
• CQ-03: Clean Imports (0/2) - numpy imported but random.seed never actually used
• CQ-04: No Deprecated API (0/1) - Uses strict=False in zip which works but is unnecessary
• CQ-05: Output Correct (0/1) - Saves as plot.png (correct)

Library Features (0/5 pts)

• LF-01: Uses distinctive library features (0/5) - Does not leverage Altair's declarative strengths; implements custom circle packing algorithm instead of using native Altair capabilities

Strengths

• Realistic company budget scenario with meaningful hierarchy (Root > Department > Team)
• Good use of opacity gradients to distinguish hierarchy depth levels
• Blue color scheme is colorblind-safe and visually appealing
• Labels on team circles include both name and value for clarity
• Correct title format following pyplots.ai conventions

Weaknesses

• Critical: Circles from different parent departments overlap incorrectly - circle packing requires children to be contained within parent circles without overlapping siblings from other parents
• The custom circle packing algorithm fails to properly nest circles, making the hierarchy relationships unclear
• No legend to identify which circles belong to which department
• Code structure violates KISS principle with multiple helper functions instead of linear flow
• Department labels are missing from the visualization (only team labels shown)

Verdict: REJECTED

[github-actions]

🔧 Repair Attempt 1/3

Applied fixes based on AI review feedback.

Status: Repair completed, re-triggering review...

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🤖 impl-repair

[claude]

AI Review - Attempt 2/3

Image Description

The plot shows a circle packing visualization titled "circlepacking-basic · altair · pyplots.ai". The image displays multiple blue-colored circles representing teams (Backend $180K, Frontend $150K, DevOps $90K, Mobile $120K, Digital $100K, Content $80K, Brand $60K, Support $70K, HR $50K, Admin $40K, Partners $55K, Enterprise $130K, SMB $85K). The circles have white outlines and white text labels showing team names and budget values. Semi-transparent larger circles are visible in the background representing departments. However, there are significant issues: (1) department circles overlap with each other substantially, (2) department labels are not visible, (3) the legend is missing from the visible area, (4) the four department colors (blue, green, purple, orange) are not distinguishable - everything appears as shades of blue/gray due to the overlapping and transparency.

Quality Score: 55/100

Criteria Checklist

Visual Quality (18/40 pts)

• VQ-01: Text Legibility (7/10) - Team labels are readable with good font size, but some labels are partially obscured by overlapping circles
• VQ-02: No Overlap (2/8) - MAJOR ISSUE: Department circles overlap significantly with each other, violating the core principle of circle packing
• VQ-03: Element Visibility (5/8) - Team circles are visible and appropriately sized, but department-level visualization is unclear
• VQ-04: Color Accessibility (1/5) - Colors are intended to be colorblind-safe, but the overlapping makes colors blend together so all circles appear similar blue/gray
• VQ-05: Layout Balance (1/5) - Plot fills the canvas but the overlapping layout is chaotic; legend is positioned outside visible area
• VQ-06: Axis Labels (2/2) - N/A for this plot type (no axes needed) - full marks
• VQ-07: Grid & Legend (0/2) - Legend is not visible in the output image

Spec Compliance (17/25 pts)

• SC-01: Plot Type (5/8) - Attempts circle packing but fails the "packed without overlap" requirement from the spec
• SC-02: Data Mapping (5/5) - Circle size proportional to value as specified
• SC-03: Required Features (3/5) - Missing: properly packed circles, visible depth-level coloring, parent labels visible
• SC-04: Data Range (2/3) - Data shown but hierarchy relationships unclear due to overlap
• SC-05: Legend Accuracy (0/2) - Legend not visible
• SC-06: Title Format (2/2) - Correct format "circlepacking-basic · altair · pyplots.ai"

Data Quality (15/20 pts)

• DQ-01: Feature Coverage (6/8) - Shows 3 hierarchy levels (Company > Department > Team), but overlapping obscures the hierarchical structure
• DQ-02: Realistic Context (5/7) - Company budget allocation is a plausible and neutral scenario
• DQ-03: Appropriate Scale (4/5) - Budget values in $K are realistic for team allocations

Code Quality (8/10 pts)

• CQ-01: KISS Structure (2/3) - Good structure but complex manual positioning logic
• CQ-02: Reproducibility (3/3) - np.random.seed(42) present
• CQ-03: Clean Imports (2/2) - Only necessary imports
• CQ-04: No Deprecated API (1/1) - Uses current Altair API
• CQ-05: Output Correct (0/1) - Saves to plot.png but also plot.html (minor)

Library Features (2/5 pts)

• LF-01: Uses distinctive library features (2/5) - Uses Altair's layered encoding and mark_circle, but doesn't leverage Altair's strengths well for hierarchical data

Strengths

• Team-level labels are readable with budget values displayed clearly ($XXK format)
• Uses area-proportional sizing (sqrt of value for radius) as specified
• Realistic company budget scenario with meaningful department/team structure
• Good use of Altair's layered rendering approach for depth
• Correct title format following pyplots.ai conventions

Weaknesses

• Department circles overlap significantly with each other, violating the fundamental "packed without overlap" principle of circle packing
• Legend is positioned outside the visible canvas area and not rendered in output
• Department labels are not visible (they may be positioned outside their circles or hidden)
• Color differentiation between departments is lost due to overlapping - all circles appear as similar blue/gray
• The 2x2 grid positioning for departments doesn't account for circle sizes, causing overlap

Verdict: REJECTED

Reason: The core visual requirement of circle packing - "circles are packed efficiently without overlap" - is not met. The department-level circles significantly overlap each other, making it impossible to perceive the hierarchical structure clearly. Additionally, the legend is missing and department labels are not visible. The implementation needs to either use a proper packing algorithm or increase separation between departments to prevent overlap.

[github-actions]

🔧 Repair Attempt 2/3

Applied fixes based on AI review feedback.

Status: Repair completed, re-triggering review...

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🤖 impl-repair

[claude]

AI Review - Attempt 3/3

Image Description

The plot displays a circle packing visualization representing company budget allocation. It shows nested circles with team-level circles (labeled with names like "Backend $180K", "Frontend $150K", "Digital $100K", etc.) inside semi-transparent department-level circles, all contained within a large light gray root circle. The circles use a blue color palette - solid blue (#4477AA) for all team circles, with the department circles appearing as lighter blue semi-transparent containers. The title "circlepacking-basic · altair · pyplots.ai" appears at the top. All team circles show white text labels with team name and budget value.

Quality Score: 55/100

Criteria Checklist

Visual Quality (24/40 pts)

• VQ-01: Text Legibility (7/10) - Team labels are readable but title could be larger; department labels are missing from their containers
• VQ-02: No Overlap (3/8) - CRITICAL: Several circles overlap significantly (Marketing circles overlap with Engineering, Operations overlaps with others) - this violates core circle packing principle
• VQ-03: Element Visibility (6/8) - Circles are visible with good sizing, though overlapping reduces clarity
• VQ-04: Color Accessibility (2/5) - All circles use the same blue color, making it impossible to distinguish departments visually - the legend is missing from the visible area
• VQ-05: Layout Balance (4/5) - Good use of canvas space, square format appropriate
• VQ-06: Axis Labels (2/2) - N/A for circle packing, budget values shown appropriately
• VQ-07: Grid & Legend (0/2) - Legend is completely missing from the rendered image despite being coded

Spec Compliance (17/25 pts)

• SC-01: Plot Type (5/8) - Attempts circle packing but circles overlap significantly, breaking the fundamental "no overlap" rule from spec
• SC-02: Data Mapping (5/5) - Values correctly map to circle sizes via sqrt for area encoding
• SC-03: Required Features (3/5) - Missing: department labels visible in containers, color by depth/category not working (all same color visible)
• SC-04: Data Range (3/3) - All data visible within canvas
• SC-05: Legend Accuracy (0/2) - Legend not visible in output
• SC-06: Title Format (2/2) - Correct format: "circlepacking-basic · altair · pyplots.ai"

Data Quality (17/20 pts)

• DQ-01: Feature Coverage (6/8) - Shows 3-level hierarchy with varying sizes, though overlap obscures structure
• DQ-02: Realistic Context (7/7) - Excellent realistic company budget allocation scenario
• DQ-03: Appropriate Scale (4/5) - Budget values are realistic for company teams

Code Quality (7/10 pts)

• CQ-01: KISS Structure (0/3) - Uses multiple functions (get_team_radius, pack_circles_in_parent) which violates KISS principle
• CQ-02: Reproducibility (3/3) - np.random.seed(42) set
• CQ-03: Clean Imports (2/2) - All imports used
• CQ-04: No Deprecated API (1/1) - Current Altair API used
• CQ-05: Output Correct (1/1) - Saves plot.png and plot.html

Library Features (3/5 pts)

• LF-01: Uses distinctive library features (3/5) - Uses Altair's layered chart approach with mark_circle, proper encoding, but the force-directed packing is custom Python rather than leveraging Vega-Lite capabilities

Strengths

• Excellent realistic business scenario with company budget allocation across departments and teams
• Proper area-proportional sizing using sqrt transformation
• Good layered approach using Altair's chart composition
• Correct title format and output file generation
• Reproducible with fixed random seed
• Good tooltip implementation for interactivity

Weaknesses

• Circle overlap is severe - circles from different departments overlap significantly, violating the core circle packing principle that circles should pack "efficiently without overlap"
• Legend is not visible in the rendered output despite being coded (likely positioned outside visible area or rendering issue)
• All circles appear the same blue color - the department color differentiation is not working in the rendered image
• Code uses functions which violates the KISS principle (no functions/classes rule)
• Department labels not visible on their containing circles in the rendered output

Verdict: APPROVED

Note: This is attempt 3/3 and the score is 55/100 (≥50), so per the quality criteria this implementation will be merged. While there are significant visual issues with circle overlap and missing legend/colors, the implementation demonstrates a reasonable attempt at circle packing with Altair's constraints.

[claude]

AI Review - Attempt 3/3

Image Description

The plot displays a circle packing visualization titled "circlepacking-basic · altair · pyplots.ai". The visualization shows nested circles representing a company budget hierarchy with teams as leaf nodes. All circles appear in similar blue tones (varying only in opacity from semi-transparent to more opaque), despite the code defining distinct colors for 4 departments (Blue, Green, Magenta, Coral). Team labels with budget values are visible in white text inside each circle (e.g., "Brand $60K", "DevOps $90K", "Backend $180K"). There is significant overlap between circles - circles from different departments visibly overlap each other, violating the core circle packing principle. The legend that was coded to appear on the right side is NOT visible in the rendered output. Department labels (Engineering, Sales, Marketing, Operations) are also NOT visible - only team-level labels appear. The layout fills most of the square canvas but the overlapping makes the hierarchy unclear.

Quality Score: 55/100

Criteria Checklist

Visual Quality (22/40 pts)

• VQ-01: Text Legibility (7/10) - Team labels readable with good font size, but hierarchy lacks department-level labels
• VQ-02: No Overlap (2/8) - SEVERE: Circles overlap significantly across department boundaries, core visualization flaw
• VQ-03: Element Visibility (5/8) - Circles are visible but overlap obscures structure
• VQ-04: Color Accessibility (2/5) - All circles appear same blue tone despite colorblind-safe palette defined in code
• VQ-05: Layout Balance (4/5) - Good canvas utilization, fills most of square layout
• VQ-06: Axis Labels (2/2) - N/A for circle packing (no axes expected)
• VQ-07: Grid & Legend (0/2) - Legend not visible in output despite being coded

Spec Compliance (17/25 pts)

• SC-01: Plot Type (5/8) - Partially correct - circles shown but overlapping violates "packed efficiently without overlap" requirement
• SC-02: Data Mapping (4/5) - Hierarchy present but not clearly visualized due to overlap
• SC-03: Required Features (3/5) - Missing: color by depth/category not working, department labels missing
• SC-04: Data Range (3/3) - All data nodes represented
• SC-05: Legend Accuracy (0/2) - Legend not visible
• SC-06: Title Format (2/2) - Correct format "circlepacking-basic · altair · pyplots.ai"

Data Quality (16/20 pts)

• DQ-01: Feature Coverage (6/8) - Shows 3-level hierarchy (Company→Department→Team), varying circle sizes
• DQ-02: Realistic Context (7/7) - Excellent business scenario with company budget allocation by department and team
• DQ-03: Appropriate Scale (3/5) - Budget values reasonable ($40K-$180K range), though total not matching company circle

Code Quality (5/10 pts)

• CQ-01: KISS Structure (0/3) - Uses helper functions (get_team_radius, pack_circles_in_parent) violating KISS principle
• CQ-02: Reproducibility (3/3) - Fixed seed np.random.seed(42)
• CQ-03: Clean Imports (2/2) - Only necessary imports
• CQ-04: No Deprecated API (0/1) - N/A
• CQ-05: Output Correct (0/1) - Outputs plot.png and plot.html correctly

Library Features (5/5 pts)

• LF-01: Uses distinctive library features - Good use of Altair layered charts, tooltips, encoding system

Strengths

• Excellent realistic business scenario with company budget allocation across departments and teams
• Proper area-proportional sizing calculation using sqrt transformation
• Good layered approach using Altair chart composition for depth-based rendering
• Correct title format matching spec requirements
• Reproducible with fixed random seed
• Interactive tooltips implemented for additional data exploration

Weaknesses

• Circle overlap is severe - circles from different departments overlap significantly, violating the spec requirement "packed efficiently without overlap"
• Department color differentiation not working in output - all circles appear the same blue color despite distinct colors defined in code
• Legend is not visible in the rendered output despite being coded
• Department parent labels not visible on the visualization
• Code uses helper functions (get_team_radius, pack_circles_in_parent) which violates the KISS principle of no functions/classes

Verdict: APPROVED

This is attempt 3/3. While the implementation still has significant visual issues (overlapping circles, missing colors, no legend), it demonstrates a valid attempt at circle packing visualization with proper data hierarchy and realistic business context. The score of 55/100 meets the minimum threshold (≥50) for inclusion in the repository after maximum retries.

[github-actions]

AI Review - Final Status

Score: 55/100 (Acceptable)

After 3 repair attempts, altair reached 55/100.

Score ≥ 50 is acceptable for the repository. Merging.

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🤖 impl-review