Code Generation GitHub Repositories (2026) · Open Source Tools

Type-safe, import-aware, width-aware code generation across multiple languages

Compile-time-safe dependency injection for Swift without the boilerplate

CasADi is a symbolic framework for numeric optimization implementing automatic differentiation in forward and reverse modes on sparse matrix-valued computational graphs. It supports self-contained C-code generation and interfaces state-of-the-art codes such as SUNDIALS, IPOPT etc. It can be used from C++, Python, Matlab/Octave, Julia or Javascript

Go test suite framework – BDD vocabulary, lifecycle hooks, fixtures, fuzzing, benchmarking, snapshots. Zero reflection, zero runtime deps – powered by code generation.

An agent-native QA CLI for web pages. Deterministic, no tests to write, no LLM.

Generate fully-typed, lint-clean language bindings for Rust libraries across 16 languages

Declarative Kotlin code generation API written in pure Kotlin.

Micronas Interconnect Expander (Electronic Design Automation, Electronic System-Level Design)

Open-source OpenAPI mock server with cloud hosting and local modes for development, testing, and CI. Generates realistic API responses from specs with latency simulation, error injection, proxy fallback, and request validation. Validated against 2,200+ real-world OpenAPI specs.

Go full-stack headless content platform on go-kratos: Protobuf as the single API contract with Go/TypeScript/OpenAPI codegen, REST + gRPC dual-protocol admin/app/core services, multi-tenant isolation with menu/API/data-level RBAC and native i18n — with a Vue3 (Vben) admin and Vue/React/Taro/Flutter app frontends.

Generate avro schemas from python dataclasses, Pydantic models and Faust Records. Code generation from avro schemas. Serialize/Deserialize python instances with avro schemas.

Generates Kotlin Code from OpenAPI 3 Specifications

DSL and compiler framework for automated finite-differences and stencil computation

Supercharge Swift's Codable implementations with macros meta-programming.

[HISTORICAL] Multiply inheritance code generation for PHP