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Quality regression: generated visualizations are subpar and broken

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Les mainteneurs répondent en général sous 1 jour

Une pull request liée a déjà été fusionnée.

  • #60 par @jerelvelarde — fusionnée

Évaluation

Difficulté
4/5
Temps estimé
3-5 jours
Accessibilité débutants
35/100
Type d'issue
Bug
Clarté
À clarifier
Activité
Calme
Stack technique
three.js, typescript
Domaine
ai, data-visualization

Piste de recherche

Start by reviewing the agent system prompt, the widget renderer import map, and the LangGraph/CopilotKit setup around langchain_openai.ChatOpenAI. Compare the attached .chalk HTML outputs across models and broader visualization prompts, then determine whether prompt guidance, few-shot examples, or model changes address the regression. Done means the cause is identified and a reproducible quality improvement is demonstrated.

Rédigé par le modèle d'indexation à partir du texte de l'issue.

Description

Problem

The quality of generated visualizations from the deployed agent has degraded. The same prompt ("sphere icosahedron morph") produces broken or low-quality outputs across multiple attempts.

Evidence

Two downloaded outputs from the same prompt attached as .html files in .chalk/:

Attempt 1 — CSS 3D divs (sphere-icosahedron-morph (1).html)
  • Uses 20 <div> elements with CSS transform-style: preserve-3d and clip-path transitions
  • No WebGL / Three.js despite it being available via the import map
  • Hover interaction conflicts with the CSS spin animation (style.animation = 'none' vs CSS animation: spin 10s)
  • The morph is cosmetic — just toggling border-radius: 50% ↔ clip-path: polygon() on flat divs
  • Faces positioned via manual JS math that approximates 3D but doesn't actually render proper geometry
Attempt 2 — Canvas 2D fake 3D (sphere-icosahedron-morph.html)
  • Uses canvas.getContext('2d') instead of WebGL
  • Sphere is just a radial gradient circle, not actual geometry
  • Icosahedron faces are projected triangles drawn with ctx.moveTo/lineTo — no real lighting
  • Uses color-mix() CSS which has mixed browser support
  • The "morph" is interpolating between a gradient blob and wireframe triangles — visually unconvincing
What a good output would look like
  • Use Three.js (available in the import map at https://esm.sh/three)
  • Proper IcosahedronGeometry with MeshStandardMaterial or custom shaders
  • Real WebGL lighting and smooth vertex-level morphing between sphere and icosahedron
  • Orbit controls or smooth auto-rotation

Possible causes

  1. Model regression — GPT-5.4 (gpt-5.4-2026-03-05) may be producing lower-quality code for complex 3D visualizations compared to earlier versions
  2. System prompt lacks quality guidance — The current prompt mentions widgetRenderer capabilities but doesn't guide the model toward using Three.js/WebGL for 3D content, or set quality expectations for interactive visualizations
  3. No few-shot examples — The agent has no reference for what "good" output looks like, so it falls back to simpler CSS/Canvas approaches

Suggested investigation

  • Compare output quality between GPT-5.4 and other models (e.g. Claude) for the same prompts
  • Add quality guidance to the system prompt (e.g. "For 3D visualizations, use Three.js from the import map")
  • Consider adding few-shot examples of high-quality widget HTML in the agent skills
  • Test a broader set of prompts to determine if regression is model-wide or specific to 3D content

Environment

  • Model: gpt-5.4-2026-03-05 via langchain_openai.ChatOpenAI
  • Agent: LangGraph with CopilotKit middleware
  • Widget renderer: sandboxed iframe with import map (Three.js, GSAP, D3, Chart.js available)
Langage dominant
TypeScript
Étoiles
3.9k
Forks
414
Merge moyen
4 h
PR mergées (30 j)
6

Préparer son environnement

Par où commencer

  1. Lisez l'issue en entier, puis le guide de contribution du projet.
  2. Signalez en commentaire que vous la prenez — cela évite que deux personnes fassent le même travail.
  3. Forkez le dépôt et travaillez sur une branche.
  4. Ouvrez une pull request qui référence le numéro de l'issue.

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