Top SPECIFICATION GitHub Repositories & Tools (2026)

Spec-driven development (SDD) for AI coding assistants.

The toolkit to pack, ship, store, and deliver container content

Examples and server integrations for generating the Swagger API Specification, which enables easy access to your REST API

OpenAPI based HTTP Client code generator

The open source, cloud native tool for API Mocking and Testing. Microcks is a Cloud Native Computing Foundation incubating project 🚀

RISC-V Supervisor Binary Interface (RISC-V SBI) library in Rust; runs on M or HS mode; good support for embedded Rust ecosystem. For binary download see firmware folder.

a language for building system dynamic models

Workflow Runtime Engine based on the Open Workflow Specification (CNCF Sandbox project) for Agentic Workflows

CLI for streamlined spec-driven development