What problem does it solve? Rewriting a payment integration from Juspay to Cashfree breaks in predictable places: different auth headers, different checkout handoff tokens, different webhook verification, and a different status model. This Skill provides the complete mapping and step-by-step rewrite path so the migration does not silently break fulfilment, refunds, or webhook handling. ## Core Features & Use Cases - Concept and Field Mapping: Translates Juspay concepts (sdk_payload, client_auth_token, x-merchantid, CHARGED status) to Cashfree equivalents (payment_session_id, x-client-id/x-client-secret, PAID status) with endpoint, credential, and status tables. - Guided Seven-Step Migration: Covers inventorying Juspay code, rewriting order creation/verification/refunds, replacing frontend checkout handoff, rewriting webhook signature verification, rebuilding fulfilment logic, and parallel-run cutover. - Deep Reference Document: Includes per-language backend rewrites (Node.js, Python, Java, Go), webhook event maps, refund and subscription/mandate mapping, mobile SDK mapping, and an orchestrator feature exit checklist. - Use Case: A merchant whose Node.js backend calls Juspay's /session API with Basic Auth and whose frontend uses Hypercheckout process(...) can follow this Skill to produce a working Cashfree integration using PGCreateOrder, payment_session_id, and Cashfree.js checkout. ## Quick Start Ask the AI to migrate the existing Juspay order creation and webhook handling code in this project to Cashfree Payments.