# Author: Liam Grinstead
# Collapse gradient waveform from τ_eff, β, and coherence response

def render_waveform(agent: dict, score: float) -> str:
    tau = agent.get("collapse_overlay", {}).get("tau_eff", 1.0)
    beta = agent.get("collapse_overlay", {}).get("beta_band", 0.5)
    amp = min(40, 12 + tau * 10)
    hue = int(20 + beta * 220)
    speed = max(1.2, 2.4 - beta)

    return f"""
    <svg width="420" height="140" xmlns="http://www.w3.org/2000/svg">
      <text x="10" y="24" font-size="16">Collapse Gradient</text>
      <path d="M10 80 Q80 {80-amp} 150 80 T290 80 T410 80"
            stroke="hsl({hue},80%,50%)" fill="none" stroke-width="3">
        <animate attributeName="stroke" values="hsl({hue},80%,50%);hsl({hue},80%,65%);hsl({hue},80%,50%)"
                 dur="{speed}s" repeatCount="indefinite"/>
      </path>
      <text x="10" y="120" font-size="12">τ_eff={tau} · β={beta} · score={score}</text>
    </svg>
    """