Improve feasibility checks for interactive/capability-specific specs

[MarkusNeusinger]

Problem

The line-interactive spec requires true interactivity (hover tooltips, zoom, pan, range selection). However, implementations were generated and approved for matplotlib, seaborn, and plotnine - libraries that can only output static PNG files.

These implementations "faked" interactivity by:

• Using mplcursors (only works in live display, not in saved PNG)
• Adding static annotations to "simulate" hover states
• Adding text hints like "use scroll to zoom" that don't actually work in PNG output

This passed AI quality review with scores of 85-88/100.

Root Cause

1. impl-generate prompts don't check if a spec's requirements are feasible for the target library
2. quality-evaluator prompts don't verify that claimed features actually work in the saved output format
3. No automatic not-feasible detection for capability mismatches

Affected Specs

Any spec requiring features that static libraries can't provide:

• line-interactive - hover, zoom, pan (matplotlib/seaborn/plotnine deleted)
• Potentially others with: animations, hover tooltips, click interactions, etc.

Library Capability Matrix

Feature	matplotlib	seaborn	plotnine	plotly	bokeh	altair	highcharts	letsplot	pygal
Static PNG	✅	✅	✅	✅	✅	✅	✅	✅	✅
Interactive HTML	❌	❌	❌	✅	✅	✅	✅	✅	⚠️
Hover tooltips	❌	❌	❌	✅	✅	✅	✅	✅	⚠️
Zoom/Pan	❌	❌	❌	✅	✅	✅	✅	✅	❌
Animations	❌	❌	❌	✅	❌	❌	✅	❌	❌

Proposed Fixes

1. Update prompts/library/*.md with capability declarations

Add to each library prompt:

## Library Capabilities
- Output formats: PNG only (no HTML)
- Interactivity: None (static output)
- NOT FEASIBLE for specs requiring: hover, zoom, pan, animations, click handlers

2. Update prompts/plot-generator.md with feasibility check

Add pre-generation step:

## Before Generating
1. Check if spec requirements match library capabilities
2. If spec requires interactivity but library only outputs static images → STOP
3. Return "NOT_FEASIBLE: {library} cannot provide {required_feature}"

3. Update prompts/quality-evaluator.md with output verification

Add to quality criteria:

## Auto-Reject: Fake Features
- AR-08: FAKE_INTERACTIVITY - Code claims interactivity but output is static
  - Check: If spec requires hover/zoom → verify output is HTML, not just PNG
  - Check: If code uses interactive libraries (mplcursors) but saves as PNG → REJECT

4. Add spec tagging for required capabilities

In specification.yaml:

requires:
  - interactive_output  # Needs HTML, not just PNG
  - hover_tooltips
  - zoom_pan

Then impl-generate can auto-skip incompatible libraries.

Immediate Actions Taken

• Deleted line-interactive implementations for matplotlib, seaborn, plotnine
• Deleted corresponding GCS images and metadata

🤖 Generated with Claude Code