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ChromiumRL Signals

ChromiumRL exposes browser-engine signals that are not available in visual-only metrics. These signals are captured via CDP while WootzApp renders the task page.

Typical signals:

  • compositor stability
  • layout timing
  • CLS attribution
  • touch target fidelity
  • web vitals

The reward bundle combines:

  • ChromiumRL metrics
  • visual similarity
  • semantic metrics (when enabled)
  • ground-truth metrics for Design2Code

See w8_rl/rewards/chromiumrl.py and w8_rl/rewards/composite.py for details.

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