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The generated contract carries info.x-darpan-contract-version, decoupled from the product release version. The policy is additive-only: new methods, new optional parameters, and new response fields ship without a bump; breaking changes require a conscious one. See Contract versioning.

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Contract version 1

Baseline contract (current; shipped alongside Darpan 2.1.2).
  • JSON-RPC 2.0 transport over POST /rpc/json; HTTP 200 for every dispatched call.
  • Auth channels: HttpOnly darpan_login_key cookie plus CSRF token (browser, canonical) and login_key header (integration callers and fallback).
  • Method surface as documented in the service catalog.