A small todo app demonstrating how SpecDD works in practice. It shows how colocated .sdd specs guide AI agents to implement code in small, well-defined steps while reducing errors and keeping changes aligned with the intended design.

Specification-Driven Development framework that enables humans and AI agents to build better software by giving them small, local instructions right where the code lives. It increases productivity, reduces implementation errors, and helps keep changes aligned with the project’s intended design.

SpecDD CLI is a tool for working with SpecDD framework-enabled projects.

Homebrew tap for installing the SpecDD CLI.

Reusable Agent Skills-standard skills for working in SpecDD projects

SpecDD plugin for Antigravity: reusable skills for working under .sdd contracts and active SpecDD project bootstraps.

SpecDD skills for Cline: on-demand workflows for implementing, reviewing, testing, documenting, and tracing changes in SpecDD projects.

SpecDD skills for Junie: reusable agent workflows for reading .sdd contracts and working under active SpecDD project authority.

SpecDD skills for GitHub Copilot: orientation, planning, implementation, review, testing, tracing, and documentation workflows for SpecDD projects.

SpecDD skills for Claude Code, adding specification-aware workflows for planning, implementation, review, testing, debugging, tracing, and documentation.