The original title is: "Agent-Ready Commerce, Part 5: Keeping ACP, MCP, and AP2 Adapters Thin"

Short summary

Protocol adapters in agent-commerce systems often drift from translation into business-logic decision-making, creating semantic inconsistency across interfaces like MCP, ACP, and AP2. The solution: keep adapters thin by moving all commercial meaning—eligibility, policy interpretation, checkout validity—into a shared platform core layer, not into protocol-specific boundary code. This prevents multiple contradictory interpretations of the same product state across different integrations.

• •Adapters should translate protocols, not decide commercial logic
• •Semantic drift occurs when different adapters implement the same concept differently
• •Keep commercial meaning (eligibility, policy, authority) in platform core, not protocol boundaries

Generated with AI, which can make mistakes.