AI / FlutterBench / Tasks / flutter-custom-render-object / flutter-custom-render-object__t25-gpt-5
Trial Evaluation

flutter-custom-render-object__t25-gpt-5

Task: google/flutter-custom-render-object
PARTIAL
72 % Composite Reward
Model GPT 5 OpenAI
Agent Harness codex-agent Dart MCP + Skills
Tokens 84.6k 80.8k in / 3.8k out
Cost $0.2398 USD estimated
Execution Phase Durations
Environment Setup10.0s
Agent Setup10.0s
Agent Execution1.0m
Verifier29.0s

Scoring Rubric Breakdown

Composite Reward = 0.60×Outcome + 0.30×Quality + 0.10×DX

Detailed criteria evaluation produced by automated test graders and LLM rubrics:

OUTCOMEWeight 60%
69%
render_box_layout wt: 40% 1.00

performLayout honors BoxConstraints and sets size accurately.

paint_canvas_verification wt: 40% 0.69

Custom painter draws polygons, ticks, and labels without clip bleed.

hit_test_gesture wt: 20% 0.20

hitTestChildren detects taps on radar chart vertices.

QUALITYWeight 30%
69%
StaticAnalysisGrader wt: 50% 0.69

3 linter warnings detected.

structural_validation wt: 30% 0.60

Clean separation of concerns and architectural layers.

idiomatic_review wt: 20% 0.69

Dart 3 idioms (pattern matching, records, sealed classes) adherence.

DXWeight 10%
97%
tool_usage wt: 40% 0.97

Dart MCP tools (analyze_files, dtd, hot_reload) utilized efficiently.

trajectory wt: 30% 0.97

Linear problem-solving without excessive tool backtracking.

error_recovery wt: 30% 1.00

Fast turnaround from initial compile warnings to clean build.

Agent Execution Trajectory

Sequential step timeline captured during autonomous agent execution:

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Generated Code Artifacts

Files modified or generated by the agent during this trial:

📄 artifacts/workspace/lib/rendering/radar_chart_render_box.dart Generated 
// Generated implementation for flutter-custom-render-object
// Model: gpt-5
// Verification score: 0.72 (partial)
📄 artifacts/workspace/lib/widgets/radar_chart.dart Generated 
// Generated implementation for flutter-custom-render-object
// Model: gpt-5
// Verification score: 0.72 (partial)
📄 artifacts/workspace/test/render_box_test.dart Generated 
// Generated implementation for flutter-custom-render-object
// Model: gpt-5
// Verification score: 0.72 (partial)

Execution & Verifier Logs

Verifier Standard Output (test-stdout.txt) 
00:00 +0: loading tests/graders.dart
00:01 +1: Environment setup verification passed.
00:02 +2: Task codebase compilation check.
00:03 +3: 3/5 Custom RenderObject & Canvas tests passed.
00:04 +3 -1: 2 edge-case assertions failed.
00:05 +4: Static analysis completed with minor hints.
Overall result: PARTIAL (Score: 0.72)
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