io.github.emiliaprotocol/mcp-server 0 stars mcpmodel-context-protocolhuman-in-the-loophuman-signoffwebauthnpasskeyirreversible-actionspayment-guardagent-accountabilityagent-safetyai-agentstrust-receiptoffline-verificationseparation-of-dutiespolicy-evaluationdelegationemilia-protocol