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v7.20.0 stable release comes with 140+ enhancements, bug fixes. Once again thanks for all the contributions from the community.

This release comes with 2 new generators:

  • [Terraform] New Terraform Provider generator [#22949]
  • C++ Httplib server codegen [#21724]

Below are the highlights of the changes. For a full list of changes, please refer to the "Pull Request" tab.

General

  • feat: Make model property generation deterministic by sorting alphabetically [#22836]
  • [Normalizer] add type information to an error message [#22742]

C

  • [csharp][generichost] Added xml comments and restrict some access [#22796]
  • C# GenericHost Support multi targetting [#22234]
  • C# GenericHost remove state from TokenProvider abstract base class so it makes more sense for JIT requested tokens (for long lived ApiClients with OAuth security schemes) [#22233]
  • [csharp][generichost] Add HTTP client name to fix client duplicity [#22118]

C++

  • [cpp-qt-client]Prefix signal argument types with namespace [#22921]
  • [cpp-qt] Add global server index setter for all operations [#22760]
  • C++ Httplib server codegen (New Generator) [#21724]

Go

  • [go] Fix text escaping in example code generation [#22841]

Java

  • [java][jackson] fix double serialization of discriminator [#22924]
  • [BUG] [JAVA] fix validateJsonElement failing for required nullable fields [#22912]
  • [JAVA][FEIGN] Put back hardcoded HTTP Client but without the performance issue [#22905]
  • feature(jackson3) add jackson3 support for spring generator [#22854]
  • [JAVA-SPRING;KOTLIN-SPRING] - add possibility to override x-implements and x-kotlin-implements via config options. [#22839]
  • Fix Jackson Serialization of additionalProperties on java and jaxrs-spec [#22366]

Kotlin

  • [KOTLIN;SPRING] - add support for 'x-spring-paginated' to get closer to feature parity with java-spring codegen add 'autoXSpringPaginated' option; support x-operation-extra-annotation [#22958]
  • [BUG] [KOTLIN-SPRING] @HttpExchange in declarative interface does not support property placeholders [#22882]
  • [kotlin][jvm-okhttp4] Fix multipart/form-data with JSON content-type [#22856]
  • [Kotlin][Client] Migrate Enum.values() to Enum.entities [#22852]
  • [KOTLIN-CLIENT] fix Parent interface class having incorrect collection property type List instead of Set [#22850]
  • [JAVA-SPRING][KOTLIN-SPRING] - add possibility to override x-implements and x-kotlin-implements via config options. [#22839]
  • [kotlin-server] Add polymorphism, oneOf and allOf support [#22610]

PHP

  • [php-symfony] fix sequencial escape when validating a class type [#22906]
  • [php][php-nextgen] Fix nullability when multiple response types are possible [#22827]

Protobuf

  • [Protobuf] Fix Discriminator Issue and add capability Enum Extraction [#22740]

Python

  • Update python sdk to strip any directory traversal in filename [#22965]
  • Remove coding: utf-8 as that's the default already [#22934]
  • feat(python): enhance retry configuration in REST client [#22867]
  • [python-fastapi] Set python version to 3.10 [#22823]

R

  • [R] avoid to-JSON issues when R6 classes contain lists of R6 classes [#22828]
  • [R] optionally skip parsing responses to R6 objects [#22705]

Rust

  • Add support for ApiKey auth to rust-server [#22950]
  • Add support for enums of integers in rust-server generator [#22915]
  • fix: apply integer type fitting for Rust params [#22853]
  • feat: Support selective ssl/tls backend in rust-server to optionally remove openssl [#22825]
  • [Rust] Update reqwest to 0.13 and reqwest-middleware to 0.5 [#22816]
  • fix: Fix rust-server model generation following serde_valid upgrade [#22737]

Swift

  • [swift6][client] Remove unnecessary Combine checks [#22810]
  • [swift6] fix Vapor build, disable swift 5 tests on CI and enable more swift 6 tests on CI [#22805]
  • [swift6][client] Increase minimum supported SDK to accommodate swift concurrency [#22802]
  • [swift6][client] improve swift 6 thread safety [#22801]
  • [swift6][client] Add new hooks to OpenAPIInterceptor [#22800]
  • [swift6][client] mark PromiseKit as deprecated [#22792]
  • [swift6][client] make api calls concurrent [#22790]
  • [swift5][client] soft deprecate Swift 5 generator [#22789]
  • [swift6][client] mark some closures as sendable [#22776]

Terraform

  • [Terraform] New Terraform Provider generator (New Generator) [#22949]

TypeScript

  • fix(typescript-axios): Ignore unused parameter on JSON serializer replacer function [#22858]
  • [BUG][Typescript] Fix isRelativeUrl incorrectly detecting URLs containing @, -, ~, . as not relative. [#22768]
  • [typescript-angular] Fix inner enum reference in multi-map property type [#22748]
  • Add create requestOpts method to {{classname}}Interface [#21709]
  • [typescript] make TypeScript version configurable and default to v5 [#20064]
Source: README.md, updated 2026-02-16