Virality (descriptive + prediction v0)

Descriptive hybrid (compute_virality_score)

Feature	Role
velocity	token-length proxy (capped)
acceleration	lexical spread/coordination cues
hybrid_score	weighted blend with network prior
spread_cues	count of spread-language hits

All descriptive. Label: operational measurement on text → treat as INFERRED.

Prediction v0 (predict_virality → analysis.virality.prediction)

Weak forward estimate of near-term hybrid virality from current features.

{
  "predicted_hybrid": 0.72,
  "baseline_hybrid": 0.61,
  "delta_vs_baseline": 0.11,
  "horizon": "short",
  "confidence": 0.55,
  "method": "feature_blend_v0",
  "provenance": "SPECULATIVE",
  "note": "Not a settled forecast; not Brier-eligible without settlement design."
}

Rules

• Lives under analysis, not calibration forecasts (no virality.predicted signal_key yet)
• Never sets provenance.brier
• Does not auto-settle

Inputs

hybrid, velocity, acceleration, lineage confidence, hyperstition stage, memetic score, neologism count

Community drivers (trace_semantic_variation)

Multi-label drivers (arXiv-inspired tags):

• communicative_need
• semantic_distinction
• community_identity
• platform_compression
• status_competition
• risk_signaling

Output includes driver (joined string, back-compat) and drivers (list).