{"endpoint":"/api/kyh/multi/evolution","method":"POST","description":"Relationship evolution — how a relationship changed over time, trust trajectory, temporal analysis, inflection points, pattern recognition (honeymoon fade, slow build, rupture repair), relationship health tracking, trend forecasting","price":"$3.00 via x402 (USDC on Base or Solana)","input":{"human_a":"{ name?, birthData?, textSamples?, observations?, responses? }","human_b":"Same structure as human_a","snapshots":"Array of { timestamp, label?, trust_a_to_b?, trust_b_to_a?, observations_a?, observations_b?, interaction_notes?, conflict_occurred?, collaboration_quality?, communication_frequency?, emotional_tone? }","context":"Optional: { relationship_type?, agent_role?, specific_question? }"},"output":"timespan, baseline_compatibility, trend, inflection_points, pattern, timeline, current_state, agent_recommendation, interpretation, agent_prompt","limits":{"min_snapshots":2,"max_snapshots":20}}